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C# ADO.NET帮助类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
namespace DBComm
{
static class DBCommand
{
public class DBParameters
{
private SqlCommand m_owner = null;
public DBParameters(SqlCommand owner)
{
m_owner = owner;
}
public SqlParameterCollection P()
{
return m_owner.Parameters;
}
};
public static bool BulkToDB(string tabname, DataTable dt, params string[] destColumnNames)
{
bool bRet = false;
do
{
if (dt == null)
break;
if (dt.Rows.Count == 0)
break;
using (SqlConnection conn = DBConn.GetConn())
{
if (conn == null)
break;
SqlBulkCopy bulkcopy = new SqlBulkCopy(conn);
if (bulkcopy == null)
break;
bulkcopy.DestinationTableName = tabname;
bulkcopy.BulkCopyTimeout = 30;
if (destColumnNames.Length == 0)
{
foreach (DataColumn col in dt.Columns)
bulkcopy.ColumnMappings.Add(col.ColumnName, col.ColumnName);
}
else
{
if (destColumnNames.Length == dt.Columns.Count)
{
for (int i = 0; i < destColumnNames.Length; ++i)
{
bulkcopy.ColumnMappings.Add(dt.Columns[i].ColumnName, destColumnNames[i]);
}
}
}
bulkcopy.BatchSize = dt.Rows.Count;
try
{
bulkcopy.WriteToServer(dt);
}
catch (System.Exception e)
{
string err = e.Message;
break;
}
finally
{
bulkcopy.Close();
}
}
bRet = true;
} while (false);
return bRet;
}
public static DBParameters ExecProcNonQuery(string proc_name, object[] paraValues)
{
using (SqlConnection conn = DBConn.GetConn())
{
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = proc_name;
AddInParaValues(cmd, paraValues);
cmd.ExecuteNonQuery();
return new DBParameters(cmd);
}
}
public delegate T[] FillValues<T>(SqlDataReader reader);
public static T[] QuerySomes<T>(string sql, FillValues<T> fill)
{
using (SqlConnection conn = DBConn.GetConn())
{
T[] result = null;
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = sql;
SqlDataReader reader = null;
lock (reader = cmd.ExecuteReader())
{
try
{
result = fill(reader);
}
catch (Exception e)
{
throw new Exception(e.StackTrace);
}
finally
{
reader.Close();
}
}
return result;
}
}
public delegate object FillValue(SqlDataReader reader);
public static object QuerySome(string sql, FillValue fill)
{
using (SqlConnection conn = DBConn.GetConn())
{
object result = null;
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = sql;
SqlDataReader reader = null;
lock (reader = cmd.ExecuteReader())
{
try
{
result = fill(reader);
}
catch (Exception e)
{
throw new Exception(e.StackTrace);
}
finally
{
reader.Close();
}
}
return result;
}
}
public static object FillResultValue(SqlDataReader reader)
{
object o = null;
if (reader.Read())
{
o = reader.GetValue(0);
}
return o;
}
public static bool QueryBoolean(string sql)
{
return Convert.ToBoolean(QuerySome(sql, new FillValue(FillResultValue)));
}
public static byte[] QueryBytes(string sql)
{
return (byte[])(QuerySome(sql, new FillValue(FillResultValue)));
}
public static int QueryInteger(string sql)
{
return Convert.ToInt32(QuerySome(sql, new FillValue(FillResultValue)));
}
public static string QueryStr(string sql)
{
return QuerySome(sql, new FillValue(FillResultValue)) as string;
}
private static string[] FillStrsValue(SqlDataReader reader)
{
List<string> lststr = new List<string>();
while (reader.Read())
{
lststr.Add(reader.GetString(0));
}
return lststr.ToArray();
}
public static string[] QueryStrs(string sql)
{
return QuerySomes(sql, new FillValues<string>(FillStrsValue));
}
private static bool[] FillBooleansValue(SqlDataReader reader)
{
List<bool> lstbool = new List<bool>();
while (reader.Read())
{
lstbool.Add(reader.GetBoolean(0));
}
return lstbool.ToArray();
}
public static bool[] QueryBooleans(string sql)
{
return QuerySomes(sql, new FillValues<bool>(FillBooleansValue));
}
public static void ExecCmd(string sql)
{
using (SqlConnection conn = DBConn.GetConn())
{
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = sql;
cmd.ExecuteNonQuery();
}
}
/// <summary>
/// 获取存储过程的参数列表
/// </summary>
/// <param name="proc_Name">存储过程名称</param>
/// <returns>DataTable</returns>
private static DataTable GetParameters(SqlConnection conn, string proc_Name)
{
SqlCommand comm = new SqlCommand("dbo.sp_sproc_columns", conn);
comm.CommandType = CommandType.StoredProcedure;
comm.Parameters.AddWithValue("@procedure_name", (object)proc_Name);
SqlDataAdapter sda = new SqlDataAdapter(comm);
DataTable dt = new DataTable();
sda.Fill(dt);
return dt;
}
/// <summary>
/// 为 SqlCommand 添加参数及赋值
/// </summary>
/// <param name="comm">SqlCommand</param>
/// <param name="paraValues">参数数组(必须遵循存储过程参数列表的顺序)</param>
private static void AddInParaValues(SqlCommand comm, params object[] paraValues)
{
using (SqlConnection conn = DBConn.GetConn())
{
comm.Parameters.Add(new SqlParameter("@RETURN_VALUE", SqlDbType.Int));
comm.Parameters["@RETURN_VALUE"].Direction = ParameterDirection.ReturnValue;
if (paraValues != null)
{
DataTable dt = GetParameters(conn, comm.CommandText);
int i = 0;
foreach (DataRow row in dt.Rows)
{
string key = row[3].ToString();
if (key != "@RETURN_VALUE")
{
int value = http://www.mamicode.com/int.Parse(row[4].ToString());>using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
namespace DBComm
{
class DBConn
{
private static string m_connstr;
public static string ConnString
{
get { return m_connstr; }
private set { m_connstr = value; }
}
static DBConn()
{
SqlConnectionStringBuilder connStr = new SqlConnectionStringBuilder();
connStr.DataSource = ".";
connStr.InitialCatalog = "test";
connStr.IntegratedSecurity = true;
connStr.Pooling = true; //开启连接池
connStr.MinPoolSize = 0; //设置最小连接数为0
connStr.MaxPoolSize = 100; //设置最大连接数为100
connStr.ConnectTimeout = 10; //设置超时时间为10秒
ConnString = connStr.ConnectionString;
//ConnectDB(ConnString);
}
public static SqlConnection GetConn()
{
SqlConnection conn = new SqlConnection(ConnString);
conn.Open();
return conn;
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data;
namespace DBComm
{
static class DBTableSource
{
public static DataTable GetSource(SqlConnection conn, string strsql)
{
DataTable dt = null;
SqlCommand cmd = null;
SqlDataAdapter ad = null;
try
{
lock (dt = new DataTable())
{
if (conn is SqlConnection)
{
cmd = new SqlCommand(strsql, conn);
ad = new SqlDataAdapter((SqlCommand)cmd);
}
dt.Clear();
ad.Fill(dt);
}
}
catch (Exception e)
{
throw e;
}
return dt;
}
public static DataTable Source(string strsql)
{
using (SqlConnection conn = DBConn.GetConn())
{
return GetSource(conn, strsql);
}
}
}
}
C# ADO.NET帮助类
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