上篇说的是操作的sqlServer版，因为现在公司需要用的是Oracle数据，之前没弄过，通过网上查加自己的一些实际验证贴上来，主要是方便自己查看使用，同时也希望帮到有需要的朋友；

 以下是配置文件的连接串,前提是确定你的oracle配置好

<connectionStrings>
<!--Oracle 连接串-->
<add name="oracleconn" connectionString="Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=127.0.0.1)(PORT=1521)) (CONNECT_DATA=http://www.mamicode.com/(SERVICE_NAME=ORCL)));User ID=scott;Password=tiger;Unicode=True" providerName="System.Data.OracleClient"/>
</connectionStrings>
<appSettings>

这个命名空间是必要的  using System.Data.OracleClient; 生打出来是没有的，需要引用添加上，就可以智能提示出来了

public class DBOracleHelper
{
public static OracleCommand cmd = null;
public static OracleConnection conn = null;
public static string connstr = ConfigurationManager.ConnectionStrings["oracleconn"].ConnectionString;
public DBOracleHelper()
{}
#region 建立数据库连接对象
/// <summary>
/// 建立数据库连接
/// </summary>
/// <returns>返回一个数据库的连接OracleConnection对象</returns>
public static OracleConnection init()
{
try
{
conn = new OracleConnection(connstr);
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
}
catch (Exception e)
{
throw new Exception(e.Message.ToString());
}
return conn;
}
#endregion

#region 设置OracleCommand对象
/// <summary>
/// 设置OracleCommand对象
/// </summary>
/// <param name="cmd">OracleCommand对象 </param>
/// <param name="cmdText">命令文本</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">参数集合</param>
private static void SetCommand(OracleCommand cmd,string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
cmd.Connection = conn;
cmd.CommandText = cmdText;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
cmd.Parameters.AddRange(cmdParms);
}
}
#endregion

#region 执行相应的sql语句，返回相应的DataSet对象
/// <summary>
/// 执行相应的sql语句，返回相应的DataSet对象
/// </summary>
/// <param name="sqlstr">sql语句</param>
/// <returns>返回相应的DataSet对象</returns>
public static DataSet GetDataSet(string sqlstr)
{
DataSet set = new DataSet();
try
{
init();
OracleDataAdapter adp = new OracleDataAdapter(sqlstr, conn);
adp.Fill(set);
conn.Close();
}
catch (Exception e)
{
throw new Exception(e.Message.ToString());
}
return set;
}
#endregion

#region 执行相应的sql语句，返回相应的DataSet对象
/// <summary>
/// 执行相应的sql语句，返回相应的DataSet对象
/// </summary>
/// <param name="sqlstr">sql语句</param>
/// <param name="tableName">表名</param>
/// <returns>返回相应的DataSet对象</returns>
public static DataSet GetDataSet(string sqlstr,string tableName)
{
DataSet set = new DataSet();
try
{
init();
OracleDataAdapter adp = new OracleDataAdapter(sqlstr, conn);
adp.Fill(set,tableName);
conn.Close();
}
catch (Exception e)
{
throw new Exception(e.Message.ToString());
}
return set;
}
#endregion

#region 执行不带参数sql语句，返回所影响的行数
/// <summary>
/// 执行不带参数sql语句，返回所影响的行数
/// </summary>
/// <param name="cmdstr">增，删，改sql语句</param>
/// <returns>返回所影响的行数</returns>
public static int ExecuteNonQuery(string cmdText)
{
int count;
try
{
init();
cmd = new OracleCommand(cmdText, conn);
count = cmd.ExecuteNonQuery();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return count;
}
#endregion

#region 执行带参数sql语句或存储过程，返回所影响的行数
/// <summary>
/// 执行带参数sql语句或存储过程，返回所影响的行数
/// </summary>
/// <param name="cmdText">带参数的sql语句和存储过程名</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">参数集合</param>
/// <returns>返回所影响的行数</returns>
public static int ExecuteNonQuery(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
int count;
try
{
init();
cmd = new OracleCommand();
SetCommand(cmd, cmdText, cmdType, cmdParms);
count = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return count;
}
#endregion

#region 执行不带参数sql语句，返回一个从数据源读取数据的OracleDataReader对象
/// <summary>
/// 执行不带参数sql语句，返回一个从数据源读取数据的OracleDataReader对象
/// </summary>
/// <param name="cmdstr">相应的sql语句</param>
/// <returns>返回一个从数据源读取数据的OracleDataReader对象</returns>
public static OracleDataReader ExecuteReader(string cmdText)
{
OracleDataReader reader;
try
{
init();
cmd = new OracleCommand(cmdText, conn);
reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);

}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return reader;
}
#endregion

#region 执行带参数的sql语句或存储过程，返回一个从数据源读取数据的OracleDataReader对象
/// <summary>
/// 执行带参数的sql语句或存储过程，返回一个从数据源读取数据的OracleDataReader对象
/// </summary>
/// <param name="cmdText">sql语句或存储过程名</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">参数集合</param>
/// <returns>返回一个从数据源读取数据的OracleDataReader对象</returns>
public static OracleDataReader ExecuteReader(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
OracleDataReader reader;
try
{
init();
cmd = new OracleCommand();
SetCommand(cmd, cmdText, cmdType, cmdParms);
reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return reader;
}
#endregion

#region 执行不带参数sql语句,返回结果集首行首列的值object
/// <summary>
/// 执行不带参数sql语句,返回结果集首行首列的值object
/// </summary>
/// <param name="cmdstr">相应的sql语句</param>
/// <returns>返回结果集首行首列的值object</returns>
public static object ExecuteScalar(string cmdText)
{
object obj;
try
{
init();
cmd = new OracleCommand(cmdText, conn);
obj = cmd.ExecuteScalar();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return obj;
}
#endregion

#region 执行带参数sql语句或存储过程,返回结果集首行首列的值object
/// <summary>
/// 执行带参数sql语句或存储过程,返回结果集首行首列的值object
/// </summary>
/// <param name="cmdText">sql语句或存储过程名</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">返回结果集首行首列的值object</param>
/// <returns></returns>
public static object ExecuteScalar(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
object obj;
try
{
init();
cmd = new OracleCommand();
SetCommand(cmd, cmdText, cmdType, cmdParms);
obj = cmd.ExecuteScalar();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return obj;
}
#endregion

}

.net中DBHelper(Oracle版)