首页 > 代码库 > OracleHelper(对增删改查分页查询操作进行了面向对象的封装,对批量增删改操作的事务封装)

OracleHelper(对增删改查分页查询操作进行了面向对象的封装,对批量增删改操作的事务封装)

    公司的一个新项目使用ASP.NET MVC开发,经理让我写个OracleHelper,我从网上找了一个比较全的OracleHelper类,缺点是查询的时候返回DataSet,数据增删改要写很多代码(当然,可以用代码生成器,不过配套的代码生成器暂时没有);又从网上找了一个封装了泛型方法的OracleHelper类,整合到一起,但貌似数据增删改查依然不方便;于是花了两天时间,在原有基础上对增删改查分页查询操作进行了面向对象的封装,并且对批量增删改操作进行事务封装,写事务代码更方便。

 

原理:

1、利用反射对增删改查进行面向对象的封装

2、事务:如果没有开启事务(没有调用OracleHelper类的BeginTransaction方法),则按原来的方法创建连接,操作数据库,然后关闭连接;如果开启了事务(调用了OracleHelper类的BeginTransaction方法),则对于同一个系统用户,所有数据库操作使用同一个OracleConnection,增删改操作后不关闭连接,先提交事务,事务提交后才关闭连接,下次事务操作再打开连接。

 

说明:

OracleHelper类包含如下功能:

1、基础方法(执行简单SQL语句;执行带参数的SQL语句;存储过程操作;)

2、扩展方法(泛型方法)

3、增删改查(封装了增删改查分页查询操作;查询主表数据时,关联表数据作为主表的类的属性直接查询出来,而不只是关联表数据的ID;添加操作,关联表数据和主表数据要分别添加(使用事务确保一致性);删除操作,关联表数据和主表数据要分别删除(使用事务确保一致性);修改操作,如果关联表的是新增的(即ID变了),要先添加关联表数据,再更新主表数据,如果关联表不是新增的(即ID没变),则只需要更新主表,方法中会自动更新关联表(关联表如果还有关联表也支持))

4、事务(支持多用户并发操作,但是不支持单个用户的并发操作(例如使用多线程插入数据))

 

代码:

OracleHelper.cs:

using System;using System.Collections;using System.Collections.Generic;using System.Configuration;using System.Data;using System.Data.OracleClient;using System.Linq;using System.Reflection;using System.Text;using System.Xml.Linq;using Models;using System.Web;namespace DBUtil{    /// <summary>    /// Oracle操作类    /// 2014年9月25日    /// 写程序之前,首先引用System.Data.OracleClient    /// </summary>    public class OracleHelper    {        #region 变量        /// <summary>        /// 数据库连接字符串        /// </summary>        public static string connectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ToString();        #endregion        #region 事务的OracleConnection        #region 数据库连接对象        /// <summary>        /// 数据库连接对象        /// </summary>        private static Dictionary<int, OracleConnection> connectionForTransaction = new Dictionary<int, OracleConnection>();        /// <summary>        /// 获取打开的数据库连接对象        /// </summary>        public static OracleConnection GetOpenConnection()        {            OracleConnection connection = null;            int userId = GetUserId();            if (!connectionForTransaction.ContainsKey(userId))            {                connection = new OracleConnection(connectionString);                connectionForTransaction.Add(userId, connection);                connection.Open();            }            else            {                connection = connectionForTransaction[userId];                if (connection.State == ConnectionState.Closed)                {                    connection.Open();                }            }            return connection;        }        #endregion        #region 事务对象        /// <summary>        /// 事务对象        /// </summary>        private static Dictionary<int, OracleTransaction> dicTran = new Dictionary<int, OracleTransaction>();        /// <summary>        /// 获取事务对象        /// </summary>        public static OracleTransaction GetTran()        {            OracleTransaction tran = null;            int userId = GetUserId();            if (!dicTran.ContainsKey(userId))            {                tran = GetOpenConnection().BeginTransaction();                dicTran.Add(userId, tran);            }            else            {                tran = dicTran[userId];            }            return tran;        }        /// <summary>        /// 移除事务对象        /// </summary>        public static void RemoveTran()        {            dicTran.Remove(GetUserId());        }        #endregion        #region 开起事务标志        /// <summary>        /// 事务标志        /// </summary>        private static Dictionary<int, bool> dicTranFlag = new Dictionary<int, bool>();        /// <summary>        /// 添加事务标志        /// </summary>        public static void AddTranFlag()        {            int userId = GetUserId();            dicTranFlag.Add(userId, true);        }        /// <summary>        /// 移除事务标志        /// </summary>        public static void RemoveTranFlag()        {            int userId = GetUserId();            dicTranFlag.Remove(userId);        }        /// <summary>        /// 事务标志        /// </summary>        public static bool TranFlag        {            get            {                bool tranFlag = false;                int userId = GetUserId();                if (dicTranFlag.ContainsKey(userId))                {                    tranFlag = true;                }                return tranFlag;            }        }        #endregion        #region 获取UserId        /// <summary>        /// 获取UserId        /// </summary>        public static int GetUserId()        {            return int.Parse(HttpContext.Current.Items["userId"].ToString());        }        #endregion        #endregion        #region 基础方法        #region 公用方法        #region GetMaxID        /// <summary>        /// 不支持多用户并发,慎用,请使用GetNextID方法        /// </summary>        private static int GetMaxID(string fieldName, string tableName)        {            string strsql = "select max(" + fieldName + ")+1 from " + tableName;            object obj = OracleHelper.GetSingle(strsql);            if (obj == null)            {                return 1;            }            else            {                return int.Parse(obj.ToString());            }        }        #endregion        #region Exists        public static bool Exists(string strSql, params OracleParameter[] cmdParms)        {            object obj = OracleHelper.GetSingle(strSql, cmdParms);            int cmdresult;            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))            {                cmdresult = 0;            }            else            {                cmdresult = int.Parse(obj.ToString());            }            if (cmdresult == 0)            {                return false;            }            else            {                return true;            }        }        #endregion        #endregion        #region  执行简单SQL语句        #region Exists        public static bool Exists(string SQLString)        {            using (OracleConnection connection = new OracleConnection(connectionString))            {                using (OracleCommand cmd = new OracleCommand(SQLString, connection))                {                    try                    {                        connection.Open();                        object obj = cmd.ExecuteScalar();                        if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))                        {                            return false;                        }                        else                        {                            return true;                        }                    }                    catch (System.Data.OracleClient.OracleException e)                    {                        connection.Close();                        throw new Exception(e.Message);                    }                    finally                    {                        cmd.Dispose();                        connection.Close();                    }                }            }        }        #endregion        #region 执行SQL语句,返回影响的记录数        /// <summary>        /// 执行SQL语句,返回影响的记录数        /// </summary>        /// <param name="SQLString">SQL语句</param>        /// <returns>影响的记录数</returns>        public static int ExecuteSql(string SQLString)        {            OracleConnection connection = GetOpenConnection();            using (OracleCommand cmd = new OracleCommand(SQLString, connection))            {                try                {                    if (TranFlag) cmd.Transaction = GetTran();                    int rows = cmd.ExecuteNonQuery();                    return rows;                }                catch (System.Data.OracleClient.OracleException E)                {                    connection.Close();                    throw new Exception(E.Message);                }                finally                {                    cmd.Dispose();                    if (!TranFlag) connection.Close();                }            }        }        #endregion        #region 执行多条SQL语句,实现数据库事务        /// <summary>        /// 执行多条SQL语句,实现数据库事务。        /// </summary>        /// <param name="SQLStringList">多条SQL语句</param>          public static bool ExecuteSqlTran(ArrayList SQLStringList)        {            bool re = false;            using (OracleConnection connection = new OracleConnection(connectionString))            {                connection.Open();                OracleCommand cmd = new OracleCommand();                cmd.Connection = connection;                OracleTransaction tx = connection.BeginTransaction();                cmd.Transaction = tx;                try                {                    for (int n = 0; n < SQLStringList.Count; n++)                    {                        string strsql = SQLStringList[n].ToString();                        if (strsql.Trim().Length > 1)                        {                            cmd.CommandText = strsql;                            cmd.ExecuteNonQuery();                        }                    }                    tx.Commit();                    re = true;                }                catch (System.Data.OracleClient.OracleException E)                {                    re = false;                    tx.Rollback();                    throw new Exception(E.Message);                }                finally                {                    cmd.Dispose();                    connection.Close();                }            }            return re;        }        #endregion        #region 执行带一个存储过程参数的的SQL语句        /// <summary>        /// 执行带一个存储过程参数的的SQL语句。        /// </summary>        /// <param name="SQLString">SQL语句</param>        /// <param name="content">参数内容,比如一个字段是格式复杂的文章,有特殊符号,可以通过这个方式添加</param>        /// <returns>影响的记录数</returns>        public static int ExecuteSql(string SQLString, string content)        {            using (OracleConnection connection = new OracleConnection(connectionString))            {                OracleCommand cmd = new OracleCommand(SQLString, connection);                System.Data.OracleClient.OracleParameter myParameter = new System.Data.OracleClient.OracleParameter("@content", OracleType.NVarChar);                myParameter.Value = content;                cmd.Parameters.Add(myParameter);                try                {                    connection.Open();                    int rows = cmd.ExecuteNonQuery();                    return rows;                }                catch (System.Data.OracleClient.OracleException E)                {                    throw new Exception(E.Message);                }                finally                {                    cmd.Dispose();                    connection.Close();                }            }        }        #endregion        #region 向数据库里插入图像格式的字段        /// <summary>        /// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)        /// </summary>        /// <param name="strSQL">SQL语句</param>        /// <param name="fs">图像字节,数据库的字段类型为image的情况</param>        /// <returns>影响的记录数</returns>        public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)        {            using (OracleConnection connection = new OracleConnection(connectionString))            {                OracleCommand cmd = new OracleCommand(strSQL, connection);                System.Data.OracleClient.OracleParameter myParameter = new System.Data.OracleClient.OracleParameter("@fs", OracleType.LongRaw);                myParameter.Value = fs;                cmd.Parameters.Add(myParameter);                try                {                    connection.Open();                    int rows = cmd.ExecuteNonQuery();                    return rows;                }                catch (System.Data.OracleClient.OracleException E)                {                    throw new Exception(E.Message);                }                finally                {                    cmd.Dispose();                    connection.Close();                }            }        }        #endregion        #region 执行一条计算查询结果语句,返回查询结果        /// <summary>        /// 执行一条计算查询结果语句,返回查询结果(object)。        /// </summary>        /// <param name="SQLString">计算查询结果语句</param>        /// <returns>查询结果(object)</returns>        public static object GetSingle(string SQLString)        {            using (OracleConnection connection = new OracleConnection(connectionString))            {                using (OracleCommand cmd = new OracleCommand(SQLString, connection))                {                    try                    {                        connection.Open();                        object obj = cmd.ExecuteScalar();                        if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))                        {                            return null;                        }                        else                        {                            return obj;                        }                    }                    catch (System.Data.OracleClient.OracleException e)                    {                        connection.Close();                        throw new Exception(e.Message);                    }                    finally                    {                        cmd.Dispose();                        connection.Close();                    }                }            }        }        #endregion        #region 执行查询语句,返回OracleDataReader        /// <summary>        /// 执行查询语句,返回OracleDataReader ( 注意:调用该方法后,一定要对SqlDataReader进行Close )        /// </summary>        /// <param name="strSQL">查询语句</param>        /// <returns>OracleDataReader</returns>        public static OracleDataReader ExecuteReader(string strSQL)        {            OracleConnection connection = new OracleConnection(connectionString);            OracleCommand cmd = new OracleCommand(strSQL, connection);            try            {                connection.Open();                OracleDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);                return myReader;            }            catch (System.Data.OracleClient.OracleException e)            {                throw new Exception(e.Message);            }        }        #endregion        #region 执行查询语句,返回DataSet        /// <summary>        /// 执行查询语句,返回DataSet        /// </summary>        /// <param name="SQLString">查询语句</param>        /// <returns>DataSet</returns>        public static DataSet Query(string SQLString)        {            using (OracleConnection connection = new OracleConnection(connectionString))            {                DataSet ds = new DataSet();                try                {                    connection.Open();                    OracleDataAdapter command = new OracleDataAdapter(SQLString, connection);                    command.Fill(ds, "ds");                }                catch (System.Data.OracleClient.OracleException ex)                {                    throw new Exception(ex.Message);                }                finally                {                    connection.Close();                }                return ds;            }        }        #endregion        #endregion        #region 执行带参数的SQL语句        #region 执行SQL语句,返回影响的记录数        /// <summary>        /// 执行SQL语句,返回影响的记录数        /// </summary>        /// <param name="SQLString">SQL语句</param>        /// <returns>影响的记录数</returns>        public static int ExecuteSql(string SQLString, params OracleParameter[] cmdParms)        {            OracleConnection connection = GetOpenConnection();            using (OracleCommand cmd = new OracleCommand())            {                try                {                    PrepareCommand(cmd, connection, null, SQLString, cmdParms);                    if (TranFlag) cmd.Transaction = GetTran();                    int rows = cmd.ExecuteNonQuery();                    cmd.Parameters.Clear();                    return rows;                }                catch (System.Data.OracleClient.OracleException E)                {                    throw new Exception(E.Message);                }                finally                {                    cmd.Dispose();                    if (!TranFlag) connection.Close();                }            }        }        #endregion        #region 执行多条SQL语句,实现数据库事务        /// <summary>        /// 执行多条SQL语句,实现数据库事务。        /// </summary>        /// <param name="SQLStringList">SQL语句的哈希表(key为sql语句,value是该语句的OracleParameter[])</param>        public static void ExecuteSqlTran(Hashtable SQLStringList)        {            using (OracleConnection conn = new OracleConnection(connectionString))            {                conn.Open();                using (OracleTransaction trans = conn.BeginTransaction())                {                    OracleCommand cmd = new OracleCommand();                    try                    {                        //循环                        foreach (DictionaryEntry myDE in SQLStringList)                        {                            string cmdText = myDE.Key.ToString();                            OracleParameter[] cmdParms = (OracleParameter[])myDE.Value;                            PrepareCommand(cmd, conn, trans, cmdText, cmdParms);                            int val = cmd.ExecuteNonQuery();                            cmd.Parameters.Clear();                            trans.Commit();                        }                    }                    catch                    {                        trans.Rollback();                        throw;                    }                }            }        }        #endregion        #region 执行一条计算查询结果语句,返回查询结果        /// <summary>        /// 执行一条计算查询结果语句,返回查询结果(object)。        /// </summary>        /// <param name="SQLString">计算查询结果语句</param>        /// <returns>查询结果(object)</returns>        public static object GetSingle(string SQLString, params OracleParameter[] cmdParms)        {            using (OracleConnection connection = new OracleConnection(connectionString))            {                using (OracleCommand cmd = new OracleCommand())                {                    try                    {                        PrepareCommand(cmd, connection, null, SQLString, cmdParms);                        object obj = cmd.ExecuteScalar();                        cmd.Parameters.Clear();                        if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))                        {                            return null;                        }                        else                        {                            return obj;                        }                    }                    catch (System.Data.OracleClient.OracleException e)                    {                        throw new Exception(e.Message);                    }                    finally                    {                        cmd.Dispose();                        connection.Close();                    }                }            }        }        #endregion        #region 执行查询语句,返回OracleDataReader        /// <summary>        /// 执行查询语句,返回OracleDataReader ( 注意:调用该方法后,一定要对SqlDataReader进行Close )        /// </summary>        /// <param name="strSQL">查询语句</param>        /// <returns>OracleDataReader</returns>        public static OracleDataReader ExecuteReader(string SQLString, params OracleParameter[] cmdParms)        {            OracleConnection connection = new OracleConnection(connectionString);            OracleCommand cmd = new OracleCommand();            try            {                PrepareCommand(cmd, connection, null, SQLString, cmdParms);                OracleDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);                cmd.Parameters.Clear();                return myReader;            }            catch (System.Data.OracleClient.OracleException e)            {                throw new Exception(e.Message);            }        }        #endregion        #region 执行查询语句,返回DataSet        /// <summary>        /// 执行查询语句,返回DataSet        /// </summary>        /// <param name="SQLString">查询语句</param>        /// <returns>DataSet</returns>        public static DataSet Query(string SQLString, params OracleParameter[] cmdParms)        {            using (OracleConnection connection = new OracleConnection(connectionString))            {                OracleCommand cmd = new OracleCommand();                PrepareCommand(cmd, connection, null, SQLString, cmdParms);                using (OracleDataAdapter da = new OracleDataAdapter(cmd))                {                    DataSet ds = new DataSet();                    try                    {                        da.Fill(ds, "ds");                        cmd.Parameters.Clear();                    }                    catch (System.Data.OracleClient.OracleException ex)                    {                        throw new Exception(ex.Message);                    }                    finally                    {                        cmd.Dispose();                        connection.Close();                    }                    return ds;                }            }        }        #endregion        #region PrepareCommand        private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, string cmdText, OracleParameter[] cmdParms)        {            if (conn.State != ConnectionState.Open)                conn.Open();            cmd.Connection = conn;            cmd.CommandText = cmdText;            if (trans != null)                cmd.Transaction = trans;            cmd.CommandType = CommandType.Text;//cmdType;            if (cmdParms != null)            {                foreach (OracleParameter parm in cmdParms)                    cmd.Parameters.Add(parm);            }        }        #endregion        #endregion        #region 存储过程操作        #region 执行存储过程 返回SqlDataReader        /// <summary>        /// 执行存储过程 返回SqlDataReader ( 注意:调用该方法后,一定要对SqlDataReader进行Close )        /// </summary>        /// <param name="storedProcName">存储过程名</param>        /// <param name="parameters">存储过程参数</param>        /// <returns>OracleDataReader</returns>        public static OracleDataReader RunProcedureReader(string storedProcName, IDataParameter[] parameters)        {            OracleConnection connection = new OracleConnection(connectionString);            OracleDataReader returnReader;            connection.Open();            OracleCommand command = BuildQueryCommand(connection, storedProcName, parameters);            command.CommandType = CommandType.StoredProcedure;            returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);            return returnReader;        }        #endregion        #region 执行存储过程,返回影响的行数        /// <summary>        /// 执行存储过程,返回影响的行数          /// </summary>        /// <param name="storedProcName">存储过程名</param>        /// <param name="parameters">存储过程参数</param>        /// <param name="rowsAffected">影响的行数</param>        /// <returns></returns>        public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)        {            using (OracleConnection connection = new OracleConnection(connectionString))            {                int result;                connection.Open();                OracleCommand command = BuildIntCommand(connection, storedProcName, parameters);                rowsAffected = command.ExecuteNonQuery();                result = (int)command.Parameters["ReturnValue"].Value;                //Connection.Close();                return result;            }        }        #endregion        #region 执行存储过程,什么值也不返回        /// <summary>        /// 执行存储过程,什么值也不返回         /// </summary>        /// <param name="storedProcName"></param>        /// <param name="parameters"></param>        public static void RunProcedure(string storedProcName, OracleParameter[] parameters)        {            using (OracleConnection connection = new OracleConnection(connectionString))            {                System.Data.OracleClient.OracleCommand cmd = BuildQueryCommand(connection, storedProcName, parameters);                try                {                    if (connection.State != ConnectionState.Open)                    {                        connection.Open();                    }                    cmd.ExecuteNonQuery();                }                catch (Exception ex)                {                    ex.Message.ToString();                    throw new Exception(ex.Message);                    // Console.WriteLine(ex.Message.ToString());                }                finally                {                    connection.Close();                }            }        }        #endregion        #region 执行存储过程,返回数据集        /// <summary>        /// 执行存储过程,返回数据集        /// </summary>        /// <param name="storedProcName">存储过程名</param>        /// <param name="parameters">存储过程参数</param>        /// <param name="tableName">DataSet结果中的表名</param>        /// <returns>DataSet</returns>        public static DataSet RunProcedureGetDataSet(string storedProcName, OracleParameter[] parameters)        {            using (OracleConnection connection = new OracleConnection(connectionString))            {                DataSet dataSet = new DataSet();                connection.Open();                OracleDataAdapter sqlDA = new OracleDataAdapter();                sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);                sqlDA.Fill(dataSet, "dt");                connection.Close();                return dataSet;            }        }        #endregion        #region 构建 OracleCommand 对象        /// <summary>        /// 构建 OracleCommand 对象(用来返回一个结果集,而不是一个整数值)        /// </summary>        /// <param name="connection">数据库连接</param>        /// <param name="storedProcName">存储过程名</param>        /// <param name="parameters">存储过程参数</param>        /// <returns>OracleCommand</returns>        private static OracleCommand BuildQueryCommand(OracleConnection connection, string storedProcName, IDataParameter[] parameters)        {            OracleCommand command = new OracleCommand(storedProcName, connection);            command.CommandType = CommandType.StoredProcedure;            foreach (OracleParameter parameter in parameters)            {                command.Parameters.Add(parameter);            }            return command;        }        #endregion        #region 执行存储过程,返回影响的行数        /// <summary>        /// 执行存储过程,返回影响的行数          /// </summary>        /// <param name="storedProcName">存储过程名</param>        /// <param name="parameters">存储过程参数</param>        /// <param name="rowsAffected">影响的行数</param>        /// <returns></returns>        public static int RunProcedure_rowsAffected(string storedProcName, IDataParameter[] parameters, out int rowsAffected)        {            using (OracleConnection connection = new OracleConnection(connectionString))            {                int result;                connection.Open();                OracleCommand command = BuildIntCommand(connection, storedProcName, parameters);                rowsAffected = command.ExecuteNonQuery();                result = (int)command.Parameters["ReturnValue"].Value;                //Connection.Close();                return result;            }        }        #endregion        #region 创建 OracleCommand 对象实例        /// <summary>        /// 创建 OracleCommand 对象实例(用来返回一个整数值)         /// </summary>        /// <param name="storedProcName">存储过程名</param>        /// <param name="parameters">存储过程参数</param>        /// <returns>OracleCommand 对象实例</returns>        private static OracleCommand BuildIntCommand(OracleConnection connection, string storedProcName, IDataParameter[] parameters)        {            OracleCommand command = BuildQueryCommand(connection, storedProcName, parameters);            command.Parameters.Add(new OracleParameter("ReturnValue",                         OracleType.Int32, 4, ParameterDirection.ReturnValue,             false, 0, 0, string.Empty, DataRowVersion.Default, null));            return command;        }        #endregion        #endregion        #endregion        #region 扩展方法        #region 执行返回一行一列的数据库操作        /// <summary>        /// 执行返回一行一列的数据库操作        /// </summary>        /// <param name="commandText">Oracle语句或存储过程名</param>        /// <param name="commandType">Oracle命令类型</param>        /// <param name="param">Oracle命令参数数组</param>        /// <returns>第一行第一列的记录</returns>        public static int ExecuteScalar(string commandText, CommandType commandType, params OracleParameter[] param)        {            int count = 0;            using (OracleConnection connection = new OracleConnection(connectionString))            {                using (OracleCommand cmd = new OracleCommand(commandText, connection))                {                    try                    {                        cmd.CommandType = commandType;                        cmd.Parameters.AddRange(param);                        connection.Open();                        count = Convert.ToInt32(cmd.ExecuteScalar());                    }                    catch (Exception ex)                    {                        count = 0;                    }                }            }            return count;        }        #endregion        #region 执行不查询的数据库操作        /// <summary>        /// 执行不查询的数据库操作        /// </summary>        /// <param name="commandText">Oracle语句或存储过程名</param>        /// <param name="commandType">Oracle命令类型</param>        /// <param name="param">Oracle命令参数数组</param>        /// <returns>受影响的行数</returns>        public static int ExecuteNonQuery(string commandText, CommandType commandType, params OracleParameter[] param)        {            int result = 0;            using (OracleConnection connection = new OracleConnection(connectionString))            {                using (OracleCommand cmd = new OracleCommand(commandText, connection))                {                    try                    {                        cmd.CommandType = commandType;                        cmd.Parameters.AddRange(param);                        connection.Open();                        result = cmd.ExecuteNonQuery();                    }                    catch (Exception ex)                    {                        result = 0;                    }                }            }            return result;        }        #endregion        #region 执行返回一条记录的泛型对象        /// <summary>        /// 执行返回一条记录的泛型对象        /// </summary>        /// <typeparam name="T">泛型类型</typeparam>        /// <param name="reader">只进只读对象</param>        /// <returns>泛型对象</returns>        private static T ExecuteDataReader<T>(IDataReader reader)        {            T obj = default(T);            try            {                Type type = typeof(T);                obj = (T)Activator.CreateInstance(type);//从当前程序集里面通过反射的方式创建指定类型的对象                   //obj = (T)Assembly.Load(OracleHelper._assemblyName).CreateInstance(OracleHelper._assemblyName + "." + type.Name);//从另一个程序集里面通过反射的方式创建指定类型的对象                 PropertyInfo[] propertyInfos = type.GetProperties();//获取指定类型里面的所有属性                foreach (PropertyInfo propertyInfo in propertyInfos)                {                    for (int i = 0; i < reader.FieldCount; i++)                    {                        string fieldName = reader.GetName(i);                        if (fieldName.ToLower() == propertyInfo.Name.ToLower())                        {                            object val = reader[propertyInfo.Name];//读取表中某一条记录里面的某一列信息                            if (val != null && val != DBNull.Value)                                propertyInfo.SetValue(obj, val, null);//给对象的某一个属性赋值                            break;                        }                    }                }            }            catch (Exception ex)            {            }            return obj;        }        #endregion        #region 执行返回一条记录的泛型对象        /// <summary>        /// 执行返回一条记录的泛型对象        /// </summary>        /// <typeparam name="T">泛型类型</typeparam>        /// <param name="commandText">Oracle语句或存储过程名</param>        /// <param name="commandType">Oracle命令类型</param>        /// <param name="param">Oracle命令参数数组</param>        /// <returns>实体对象</returns>        public static T ExecuteEntity<T>(string commandText, CommandType commandType, params OracleParameter[] param)        {            T obj = default(T);            using (OracleConnection connection = new OracleConnection(connectionString))            {                using (OracleCommand cmd = new OracleCommand(commandText, connection))                {                    cmd.CommandType = commandType;                    cmd.Parameters.AddRange(param);                    connection.Open();                    OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);                    while (reader.Read())                    {                        obj = OracleHelper.ExecuteDataReader<T>(reader);                    }                }            }            return obj;        }        #endregion        #region 执行返回多条记录的泛型集合对象        /// <summary>        /// 执行返回多条记录的泛型集合对象        /// </summary>        /// <typeparam name="T">泛型类型</typeparam>        /// <param name="commandText">Oracle语句或存储过程名</param>        /// <param name="commandType">Oracle命令类型</param>        /// <param name="param">Oracle命令参数数组</param>        /// <returns>泛型集合对象</returns>        public static List<T> ExecuteList<T>(string commandText, CommandType commandType, params OracleParameter[] param)        {            List<T> list = new List<T>();            using (OracleConnection connection = new OracleConnection(connectionString))            {                using (OracleCommand cmd = new OracleCommand(commandText, connection))                {                    try                    {                        cmd.CommandType = commandType;                        cmd.Parameters.AddRange(param);                        connection.Open();                        OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);                        while (reader.Read())                        {                            T obj = OracleHelper.ExecuteDataReader<T>(reader);                            list.Add(obj);                        }                    }                    catch (Exception ex)                    {                        list = null;                    }                }            }            return list;        }        #endregion        #endregion        #region 增删改查        #region 根据sequence名称获取下一个ID        /// <summary>        /// 根据sequence名称获取下一个ID        /// </summary>        public static int GetNextID(string sequenceName)        {            string sql = string.Format("select {0}.Nextval from dual", sequenceName);            DataTable dt = Query(sql).Tables[0];            return int.Parse(dt.Rows[0][0].ToString());        }        #endregion        #region 添加        /// <summary>        /// 添加        /// </summary>        public static void Insert(object obj)        {            StringBuilder strSql = new StringBuilder();            Type type = obj.GetType();            strSql.Append(string.Format("insert into {0}(", type.Name));            PropertyInfo[] propertyInfoList = type.GetProperties();            List<string> propertyNameList = new List<string>();            int savedCount = 0;            foreach (PropertyInfo propertyInfo in propertyInfoList)            {                if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == 0)                {                    if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == 0)                    {                        object val = propertyInfo.GetValue(obj, null);                        if (val != null)                        {                            propertyNameList.Add(propertyInfo.Name);                            savedCount++;                        }                    }                    else                    {                        object val = propertyInfo.GetValue(obj, null);                        if (val != null)                        {                            propertyNameList.Add(propertyInfo.Name + "Id");                            savedCount++;                        }                    }                }            }            strSql.Append(string.Format("{0})", string.Join(",", propertyNameList.ToArray())));            strSql.Append(string.Format(" values ({0})", string.Join(",", propertyNameList.ConvertAll<string>(a => ":" + a).ToArray())));            OracleParameter[] parameters = new OracleParameter[savedCount];            int i = 0;            foreach (PropertyInfo propertyInfo in propertyInfoList)            {                if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == 0)                {                    if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == 0)                    {                        object val = propertyInfo.GetValue(obj, null);                        if (val != null)                        {                            OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name, propertyInfo.GetValue(obj, null));                            parameters[i++] = oracleParameter;                        }                    }                    else                    {                        object val = propertyInfo.GetValue(obj, null);                        if (val != null)                        {                            object valProVal = val.GetType().GetProperty("Id").GetValue(val, null);                            OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name + "Id", valProVal);                            parameters[i++] = oracleParameter;                        }                    }                }            }            ExecuteSql(strSql.ToString(), parameters);        }        #endregion        #region 修改        /// <summary>        /// 修改        /// </summary>        public static void Update(object obj)        {            object oldObj = Find(obj);            if (oldObj == null) throw new Exception("无法获取到旧数据");            StringBuilder strSql = new StringBuilder();            Type type = obj.GetType();            strSql.Append(string.Format("update {0} ", type.Name));            PropertyInfo[] propertyInfoList = type.GetProperties();            List<string> propertyNameList = new List<string>();            int savedCount = 0;            foreach (PropertyInfo propertyInfo in propertyInfoList)            {                if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == 0)                {                    if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == 0)                    {                        object oldVal = propertyInfo.GetValue(oldObj, null);                        object val = propertyInfo.GetValue(obj, null);                        if (!object.Equals(oldVal, val))                        {                            propertyNameList.Add(propertyInfo.Name);                            savedCount++;                        }                    }                    else                    {                        object val = propertyInfo.GetValue(obj, null);                        object oldVal = propertyInfo.GetValue(oldObj, null);                        object oldValProVal = oldVal == null ? null : oldVal.GetType().GetProperty("Id").GetValue(oldVal, null);                        object valProVal = val == null ? null : val.GetType().GetProperty("Id").GetValue(val, null);                        if (!object.Equals(oldValProVal, valProVal))                        {                            propertyNameList.Add(propertyInfo.Name);                            savedCount++;                        }                    }                }            }            strSql.Append(string.Format(" set "));            OracleParameter[] parameters = new OracleParameter[savedCount];            int i = 0;            StringBuilder sbPros = new StringBuilder();            foreach (PropertyInfo propertyInfo in propertyInfoList)            {                if (propertyInfo.GetCustomAttributes(typeof(NotSaveAttribute), false).Length == 0)                {                    if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length == 0)                    {                        object oldVal = propertyInfo.GetValue(oldObj, null);                        object val = propertyInfo.GetValue(obj, null);                        if (!object.Equals(oldVal, val))                        {                            sbPros.Append(string.Format(" {0}=:{0},", propertyInfo.Name));                            OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name, val == null ? DBNull.Value : val);                            parameters[i++] = oracleParameter;                        }                    }                    else                    {                        object oldVal = propertyInfo.GetValue(oldObj, null);                        object val = propertyInfo.GetValue(obj, null);                        object oldValProVal = oldVal == null ? null : oldVal.GetType().GetProperty("Id").GetValue(oldVal, null);                        object valProVal = val == null ? null : val.GetType().GetProperty("Id").GetValue(val, null);                        if (!object.Equals(oldValProVal, valProVal))                        {                            sbPros.Append(string.Format(" {0}=:{0},", propertyInfo.Name + "Id"));                            OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name + "Id", valProVal == null ? DBNull.Value : valProVal);                            parameters[i++] = oracleParameter;                        }                    }                }                if (propertyInfo.GetCustomAttributes(typeof(IsEntityAttribute), false).Length > 0)                {                    object val = propertyInfo.GetValue(obj, null);                    if (val != null && Find(val) != null)                    {                        Update(val);                    }                }            }            if (sbPros.Length > 0)            {                strSql.Append(sbPros.ToString(0, sbPros.Length - 1));            }            strSql.Append(string.Format(" where Id={0}", int.Parse(type.GetProperty("Id").GetValue(obj, null).ToString())));            if (savedCount > 0)            {                ExecuteSql(strSql.ToString(), parameters);            }        }        #endregion        #region 删除        /// <summary>        /// 根据Id删除        /// </summary>        public static void Delete<T>(int id)        {            Type type = typeof(T);            StringBuilder sbSql = new StringBuilder();            sbSql.Append(string.Format("delete from {0} where Id={1}", type.Name, id));            ExecuteSql(sbSql.ToString());        }        /// <summary>        /// 根据Id集合删除        /// </summary>        public static void BatchDelete<T>(string ids)        {            if (string.IsNullOrWhiteSpace(ids)) return;            Type type = typeof(T);            StringBuilder sbSql = new StringBuilder();            sbSql.Append(string.Format("delete from {0} where Id in ({1})", type.Name, ids));            ExecuteSql(sbSql.ToString());        }        #endregion        #region 获取实体        #region 根据实体获取实体        /// <summary>        /// 根据实体获取实体        /// </summary>        private static object Find(object obj)        {            Type type = obj.GetType();            object result = Activator.CreateInstance(type);            bool hasValue = http://www.mamicode.com/false;            IDataReader rd = null;            string sql = string.Format("select * from {0} where Id={1}", type.Name, type.GetProperty("Id").GetValue(obj, null));            try            {                rd = ExecuteReader(sql);                PropertyInfo[] propertyInfoList = type.GetProperties();                int fcnt = rd.FieldCount;                List<string> fileds = new List<string>();                for (int i = 0; i < fcnt; i++)                {                    fileds.Add(rd.GetName(i).ToUpper());                }                while (rd.Read())                {                    hasValue = true;                    IDataRecord record = rd;                    foreach (PropertyInfo pro in propertyInfoList)                    {                        if (pro.PropertyType.IsClass)                        {                            object[] objArray = pro.GetCustomAttributes(typeof(IsEntityAttribute), false);                            if (objArray.Length > 0)                            {                                if (record[pro.Name + "Id"].GetType() == typeof(int))                                {                                    pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);                                }                                if (record[pro.Name + "Id"].GetType() == typeof(decimal))                                {                                    pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);                                }                                continue;                            }                        }                        if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)                        {                            continue;                        }                        pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);                    }                }            }            catch (Exception ex)            {                throw ex;            }            finally            {                if (rd != null && !rd.IsClosed)                {                    rd.Close();                    rd.Dispose();                }            }            if (hasValue)            {                return result;            }            else            {                return null;            }        }        #endregion        #region 根据Id获取实体        /// <summary>        /// 根据Id获取实体        /// </summary>        private static object FindById(Type type, int id)        {            object result = Activator.CreateInstance(type);            IDataReader rd = null;            bool hasValue = http://www.mamicode.com/false;            string sql = string.Format("select * from {0} where Id={1}", type.Name, id);            try            {                rd = ExecuteReader(sql);                PropertyInfo[] propertyInfoList = type.GetProperties();                int fcnt = rd.FieldCount;                List<string> fileds = new List<string>();                for (int i = 0; i < fcnt; i++)                {                    fileds.Add(rd.GetName(i).ToUpper());                }                while (rd.Read())                {                    hasValue = true;                    IDataRecord record = rd;                    foreach (PropertyInfo pro in propertyInfoList)                    {                        if (pro.PropertyType.IsClass)                        {                            object[] objArray = pro.GetCustomAttributes(typeof(IsEntityAttribute), false);                            if (objArray.Length > 0)                            {                                if (record[pro.Name + "Id"].GetType() == typeof(int))                                {                                    pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);                                }                                if (record[pro.Name + "Id"].GetType() == typeof(decimal))                                {                                    pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);                                }                                continue;                            }                        }                        if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)                        {                            continue;                        }                        pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);                    }                }            }            catch (Exception ex)            {                throw ex;            }            finally            {                if (rd != null && !rd.IsClosed)                {                    rd.Close();                    rd.Dispose();                }            }            if (hasValue)            {                return result;            }            else            {                return null;            }        }        #endregion        #region 根据Id获取实体        /// <summary>        /// 根据Id获取实体        /// </summary>        public static T FindById<T>(int id) where T : new()        {            Type type = typeof(T);            T result = (T)Activator.CreateInstance(type);            IDataReader rd = null;            bool hasValue = http://www.mamicode.com/false;            string sql = string.Format("select * from {0} where Id={1}", type.Name, id);            try            {                rd = ExecuteReader(sql);                PropertyInfo[] propertyInfoList = type.GetProperties();                int fcnt = rd.FieldCount;                List<string> fileds = new List<string>();                for (int i = 0; i < fcnt; i++)                {                    fileds.Add(rd.GetName(i).ToUpper());                }                while (rd.Read())                {                    hasValue = true;                    IDataRecord record = rd;                    foreach (PropertyInfo pro in propertyInfoList)                    {                        if (pro.PropertyType.IsClass)                        {                            object[] objArray = pro.GetCustomAttributes(typeof(IsEntityAttribute), false);                            if (objArray.Length > 0)                            {                                if (record[pro.Name + "Id"].GetType() == typeof(int))                                {                                    pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);                                }                                if (record[pro.Name + "Id"].GetType() == typeof(decimal))                                {                                    pro.SetValue(result, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);                                }                                continue;                            }                        }                        if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)                        {                            continue;                        }                        pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);                    }                }            }            catch (Exception ex)            {                throw ex;            }            finally            {                if (rd != null && !rd.IsClosed)                {                    rd.Close();                    rd.Dispose();                }            }            if (hasValue)            {                return result;            }            else            {                return default(T);            }        }        #endregion        #endregion        #region 获取列表        /// <summary>        /// 获取列表        /// </summary>        public static List<T> FindListBySql<T>(string sql) where T : new()        {            List<T> list = new List<T>();            object obj;            IDataReader rd = null;            try            {                rd = ExecuteReader(sql);                if (typeof(T) == typeof(int))                {                    while (rd.Read())                    {                        list.Add((T)rd[0]);                    }                }                else if (typeof(T) == typeof(string))                {                    while (rd.Read())                    {                        list.Add((T)rd[0]);                    }                }                else                {                    PropertyInfo[] propertyInfoList = (typeof(T)).GetProperties();                    int fcnt = rd.FieldCount;                    List<string> fileds = new List<string>();                    for (int i = 0; i < fcnt; i++)                    {                        fileds.Add(rd.GetName(i).ToUpper());                    }                    while (rd.Read())                    {                        IDataRecord record = rd;                        obj = new T();                        foreach (PropertyInfo pro in propertyInfoList)                        {                            if (pro.PropertyType.IsClass)                            {                                if (pro.GetCustomAttributes(typeof(IsEntityAttribute), false).Length > 0)                                {                                    if (record[pro.Name + "Id"].GetType() == typeof(int))                                    {                                        pro.SetValue(obj, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, (int)record[pro.Name + "Id"]), null);                                    }                                    if (record[pro.Name + "Id"].GetType() == typeof(decimal))                                    {                                        pro.SetValue(obj, record[pro.Name + "Id"] == DBNull.Value ? null : FindById(pro.PropertyType, int.Parse(((decimal)record[pro.Name + "Id"]).ToString())), null);                                    }                                    continue;                                }                            }                            if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)                            {                                continue;                            }                            pro.SetValue(obj, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);                        }                        list.Add((T)obj);                    }                }            }            catch (Exception ex)            {                throw ex;            }            finally            {                if (rd != null && !rd.IsClosed)                {                    rd.Close();                    rd.Dispose();                }            }            return list;        }        #endregion        #region 分页获取列表        /// <summary>        /// 分页(任意entity,尽量少的字段)        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="sql"></param>        /// <returns></returns>        public static PageViewModel FindPageBySql<T>(string sql, string orderby, int pageSize, int currentPage) where T : new()        {            PageViewModel pageViewModel = new PageViewModel();            using (OracleConnection connection = new OracleConnection(connectionString))            {                connection.Open();                string commandText = string.Format("select count(*) from ({0}) T", sql);                IDbCommand cmd = new OracleCommand(commandText, connection);                pageViewModel.total = int.Parse(cmd.ExecuteScalar().ToString());                int startRow = pageSize * (currentPage - 1);                int endRow = startRow + pageSize;                StringBuilder sb = new StringBuilder();                sb.Append("select * from ( select row_limit.*, rownum rownum_ from (");                sb.Append(sql);                if (!string.IsNullOrWhiteSpace(orderby))                {                    sb.Append(" ");                    sb.Append(orderby);                }                sb.Append(" ) row_limit where rownum <= ");                sb.Append(endRow);                sb.Append(" ) where rownum_ >");                sb.Append(startRow);                List<T> list = FindListBySql<T>(sb.ToString());                pageViewModel.rows = list;            }            return pageViewModel;        }        #endregion        #region getReaderValue 转换数据        /// <summary>        /// 转换数据        /// </summary>        private static Object getReaderValue(Object rdValue, Type ptype)        {            if (ptype == typeof(decimal))                return Convert.ToDecimal(rdValue);            if (ptype == typeof(int))                return Convert.ToInt32(rdValue);            if (ptype == typeof(long))                return Convert.ToInt64(rdValue);            return rdValue;        }        #endregion        #endregion        #region 事务(说明:不支持单个用户的并发事务操作)        #region 开始事务        /// <summary>        /// 开始事务        /// 说明:不支持单个用户的并发事务操作        /// </summary>        public static void BeginTransaction()        {            GetTran();            AddTranFlag();        }        #endregion        #region 结束事务(正常结束)        /// <summary>        /// 结束事务(正常结束)        /// </summary>        public static void EndTransaction()        {            try            {                GetTran().Commit();                RemoveTran();                RemoveTranFlag();            }            catch (Exception ex)            {                GetTran().Rollback();                RemoveTran();                RemoveTranFlag();            }            finally            {                GetOpenConnection().Close();            }        }        #endregion        #region 回滚事务(出错时调用该方法回滚)        /// <summary>        /// 回滚事务(出错时调用该方法回滚)        /// </summary>        public static void RollbackTransaction()        {            GetTran().Rollback();            RemoveTran();            RemoveTranFlag();            GetOpenConnection().Close();        }        #endregion        #endregion    }}
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辅助类代码:

NotSaveAttribute.cs:

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace DBUtil{    /// <summary>    /// ORM在保存数据的时候,会忽略打上 NotSave 批注的属性    /// </summary>    [Serializable, AttributeUsage(AttributeTargets.Property | AttributeTargets.Class)]    public class NotSaveAttribute : Attribute    {    }}
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IsEntityAttribute.cs:

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace Models{    /// <summary>    /// 标识该属性是实体    /// </summary>    [Serializable, AttributeUsage(AttributeTargets.Property | AttributeTargets.Class)]    public class IsEntityAttribute : Attribute    {    }}
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 PageViewModel.cs:

using System;using System.Collections;using System.Collections.Generic;using System.Linq;using System.Web;namespace Models{    public class PageViewModel    {        /// <summary>        /// 记录        /// </summary>        public IEnumerable rows { get; set; }        /// <summary>        /// 记录数        /// </summary>        public int total { get; set; }    }}
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 示例代码:

Models层代码:

Brand.cs:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using DBUtil;namespace Models{    public class Brand    {        public int Id { get; set; }        public string Name { get; set; }        public int BrandCount { get; set; }        public DateTime? BrandDate { get; set; }        [NotSave]        public string NotSaved { get; set; }        [IsEntity]        public BrandChild bc { get; set; }        public byte[] Blb { get; set; }        public byte[] Clb { get; set; }    }}
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BrandChild.cs:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using DBUtil;namespace Models{    public class BrandChild    {        public int Id { get; set; }        public string Name { get; set; }        public int Val { get; set; }        [IsEntity, NotSave]        public BrandChildChild bcc { get; set; }    }}
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BrandChildChild.cs:

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace Models{    public class BrandChildChild    {        public int Id { get; set; }        public string Name { get; set; }        public int Val { get; set; }    }}
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DAL层代码:

DalBase.cs:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using DBUtil;using Models;namespace DAL{    /// <summary>    /// DAL基类    /// </summary>    public class DalBase    {        public static void Insert(object obj)        {            OracleHelper.Insert(obj);        }        public static List<T> FindListBySql<T>(string sql) where T : new()        {            return OracleHelper.FindListBySql<T>(sql);        }        public static PageViewModel FindPageBySql<T>(string sql, string orderby, int pageSize, int currentPage) where T : new()        {            return OracleHelper.FindPageBySql<T>(sql, orderby, pageSize, currentPage);        }    }}
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BrandDal.cs:

using System;using System.Collections.Generic;using System.Linq;using System.Text;using DBUtil;namespace DAL.Admin{    /// <summary>    /// Brand    /// </summary>    public class BrandDal : DalBase    {        public static int GetNextID()        {            return OracleHelper.GetNextID("SEQ_BRAND");        }    }}
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Cotroller层测试代码片段:

        public void Run()        {            #region 长文本            if (true)            {                Brand bd5 = OracleHelper.FindById<Brand>(36);                bd5.Blb = Encoding.Default.GetBytes("大家早上好!");                bd5.Blb = null;                bd5.BrandDate = null;                OracleHelper.Update(bd5);                Brand bd6 = OracleHelper.FindById<Brand>(bd5.Id);            }            #endregion            #region 删除            if (false)            {                if (false)                {                    for (int i = 0; i < 20; i++)                    {                        Brand bd2 = new Brand();                        bd2.Id = BrandDal.GetNextID();                        bd2.Name = "bd2" + DateTime.Now.ToString();                        bd2.BrandCount = int.Parse(DateTime.Now.ToString("ss"));                        bd2.BrandDate = DateTime.Now;                        BrandDal.Insert(bd2);                    }                }                OracleHelper.BeginTransaction();                try                {                    OracleHelper.Delete<Brand>(160);                    OracleHelper.BatchDelete<Brand>("161,162");                    OracleHelper.EndTransaction();                }                catch (Exception ex)                {                    OracleHelper.RollbackTransaction();                }            }            #endregion            #region 获取及修改            if (false)            {                OracleHelper.BeginTransaction();                try                {                    BrandChild bc1 = new BrandChild();                    bc1.Id = BrandDal.GetNextID();                    bc1.Name = "bc1" + DateTime.Now.ToString();                    OracleHelper.Insert(bc1);                    Brand bd1 = new Brand();                    bd1.Id = BrandDal.GetNextID();                    bd1.Name = "bd1" + DateTime.Now.ToString();                    bd1.bc = bc1;                    OracleHelper.Insert(bd1);                    OracleHelper.EndTransaction();                }                catch (Exception ex)                {                    OracleHelper.RollbackTransaction();                }            }            #endregion            #region 获取及修改2            if (false)            {                OracleHelper.BeginTransaction();                try                {                    BrandChild bc1 = new BrandChild();                    bc1.Id = BrandDal.GetNextID();                    bc1.Name = "bc1" + DateTime.Now.ToString();                    OracleHelper.Insert(bc1);                    Brand bd1 = OracleHelper.FindById<Brand>(36);                    bd1.Name = "bd1" + DateTime.Now.ToString();                    bd1.bc = bc1;                    OracleHelper.Update(bd1);                    OracleHelper.EndTransaction();                }                catch (Exception ex)                {                    OracleHelper.RollbackTransaction();                }            }            #endregion            #region 获取及修改3            Brand brand_get = new Brand();            brand_get.Id = 36;            Brand brand_get2 = null; // (Brand)OracleHelper.Find(brand_get);            Brand brand_get3 = null; // (Brand)OracleHelper.FindById(typeof(Brand), 37);            Brand brand_get4 = OracleHelper.FindById<Brand>(36);            if (false)            {                brand_get4.Name = "gg" + new DateTime().ToString();                if (brand_get4.bc != null)                {                    brand_get4.bc.Name = "gg" + new DateTime().ToString();                    if (brand_get4.bc.bcc != null) brand_get4.bc.bcc.Name = "gg" + new DateTime().ToString();                    OracleHelper.Update(brand_get4);                }            }            #endregion            #region 添加            if (false)            {                Brand brand = new Brand();                brand.Id = BrandDal.GetNextID();                brand.Name = "test";                brand.BrandCount = 5;                brand.BrandDate = DateTime.Now;                BrandDal.Insert(brand);                OracleHelper.BeginTransaction();                try                {                    Brand brand2 = new Brand();                    brand2.Id = BrandDal.GetNextID();                    brand2.Name = "test";                    brand2.BrandCount = 5;                    brand2.BrandDate = DateTime.Now;                    BrandDal.Insert(brand2);                    brand2 = new Brand();                    brand2.Id = 36;                    brand2.Name = "test";                    brand2.BrandCount = 5;                    brand2.BrandDate = DateTime.Now;                    BrandDal.Insert(brand2);                    OracleHelper.EndTransaction();                }                catch                {                    OracleHelper.RollbackTransaction();                }                OracleHelper.BeginTransaction();                try                {                    Brand brand2 = new Brand();                    brand2.Id = BrandDal.GetNextID();                    brand2.Name = "test";                    brand2.BrandCount = 5;                    brand2.BrandDate = DateTime.Now;                    BrandDal.Insert(brand2);                    #region 获取及修改                    brand_get = new Brand();                    brand_get.Id = 36;                    brand_get2 = null; // (Brand)OracleHelper.Find(brand_get);                    brand_get3 = null; // (Brand)OracleHelper.FindById(typeof(Brand), 36);                    brand_get4 = OracleHelper.FindById<Brand>(36);                    brand_get4.Name = "gg" + new DateTime().ToString();                    brand_get4.bc.Name = "gg" + new DateTime().ToString();                    brand_get4.bc.bcc.Name = "gg" + new DateTime().ToString();                    OracleHelper.Update(brand_get4);                    #endregion                    List<Brand> brandList2 = BrandDal.FindListBySql<Brand>("select * from BRAND");                    brand2 = new Brand();                    brand2.Id = BrandDal.GetNextID();                    brand2.Name = "test";                    brand2.BrandCount = 5;                    brand2.BrandDate = DateTime.Now;                    BrandDal.Insert(brand2);                    OracleHelper.EndTransaction();                }                catch                {                    OracleHelper.RollbackTransaction();                }            }            #endregion            #region 查询列表            List<Brand> brandList = BrandDal.FindListBySql<Brand>("select * from BRAND");            #endregion            #region 分页查询列表            PageViewModel pageViewModel = BrandDal.FindPageBySql<Brand>("select * from BRAND", "order by Id desc", 10, 1);            #endregion            DataPage<Brand> page = DataPage<Brand>.GetPage((List<Brand>)pageViewModel.rows, 10);        }
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OracleHelper(对增删改查分页查询操作进行了面向对象的封装,对批量增删改操作的事务封装)