原文地址：http://www.cnblogs.com/haibing0107/p/6143922.html
using System;
using System.Data;
using System.Collections.Generic;
using System.Configuration;
using System.Data.OracleClient;
using System.Text;
using System.IO;
/// <summary>
/// Oracle数据库操作类
/// </summary>
public static class OracleHelper
{
/// <summary>
/// 执行数据库非查询操作,返回受影响的行数
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
/// <param name="cmdType">命令的类型</param>
/// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="cmdParms">命令参数集合</param>
/// <returns>当前查询操作影响的数据行数</returns>
public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
{
OracleCommand cmd = new OracleCommand();
using (OracleConnection conn = new OracleConnection(connectionString))
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
/// <summary>
/// 执行数据库事务非查询操作,返回受影响的行数
/// </summary>
/// <param name="transaction">数据库事务对象</param>
/// <param name="cmdType">Command类型</param>
/// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="cmdParms">命令参数集合</param>
/// <returns>当前事务查询操作影响的数据行数</returns>
public static int ExecuteNonQuery(OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
{
OracleCommand cmd = new OracleCommand();
PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
/// <summary>
/// 执行数据库非查询操作,返回受影响的行数
/// </summary>
/// <param name="connection">Oracle数据库连接对象</param>
/// <param name="cmdType">Command类型</param>
/// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="cmdParms">命令参数集合</param>
/// <returns>当前查询操作影响的数据行数</returns>
public static int ExecuteNonQuery(OracleConnection connection, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
{
if (connection == null)
throw new ArgumentNullException("当前数据库连接不存在");
OracleCommand cmd = new OracleCommand();
PrepareCommand(cmd, connection, null, cmdType, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
/// <summary>
/// 执行数据库查询操作,返回OracleDataReader类型的内存结果集
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
/// <param name="cmdType">命令的类型</param>
/// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="cmdParms">命令参数集合</param>
/// <returns>当前查询操作返回的OracleDataReader类型的内存结果集</returns>
public static OracleDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
{
OracleCommand cmd = new OracleCommand();
OracleConnection conn = new OracleConnection(connectionString);
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return reader;
}
catch
{
cmd.Dispose();
conn.Close();
throw;
}
}
/// <summary>
/// 执行数据库查询操作,返回DataSet类型的结果集
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
/// <param name="cmdType">命令的类型</param>
/// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="cmdParms">命令参数集合</param>
/// <returns>当前查询操作返回的DataSet类型的结果集</returns>
public static DataSet ExecuteDataSet(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
{
OracleCommand cmd = new OracleCommand();
OracleConnection conn = new OracleConnection(connectionString);
DataSet ds = null;
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
OracleDataAdapter adapter = new OracleDataAdapter();
adapter.SelectCommand = cmd;
ds = new DataSet();
adapter.Fill(ds);
cmd.Parameters.Clear();
}
catch
{
throw;
}
finally
{
cmd.Dispose();
conn.Close();
conn.Dispose();
}
return ds;
}
/// <summary>
/// 执行数据库查询操作,返回DataTable类型的结果集
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
/// <param name="cmdType">命令的类型</param>
/// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="cmdParms">命令参数集合</param>
/// <returns>当前查询操作返回的DataTable类型的结果集</returns>
public static DataTable ExecuteDataTable(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
{
OracleCommand cmd = new OracleCommand();
OracleConnection conn = new OracleConnection(connectionString);
DataTable dt = null;
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
OracleDataAdapter adapter = new OracleDataAdapter();
adapter.SelectCommand = cmd;
dt = new DataTable();
adapter.Fill(dt);
cmd.Parameters.Clear();
}
catch
{
throw;
}
finally
{
cmd.Dispose();
conn.Close();
conn.Dispose();
}
return dt;
}
/// <summary>
/// 执行数据库查询操作,返回结果集中位于第一行第一列的Object类型的值
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
/// <param name="cmdType">命令的类型</param>
/// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="cmdParms">命令参数集合</param>
/// <returns>当前查询操作返回的结果集中位于第一行第一列的Object类型的值</returns>
public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
{
OracleCommand cmd = new OracleCommand();
OracleConnection conn = new OracleConnection(connectionString);
object result = null;
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
result = cmd.ExecuteScalar();
cmd.Parameters.Clear();
}
catch
{
throw;
}
finally
{
cmd.Dispose();
conn.Close();
conn.Dispose();
}
return result;
}
/// <summary>
/// 执行数据库事务查询操作,返回结果集中位于第一行第一列的Object类型的值
/// </summary>
/// <param name="trans">一个已存在的数据库事务对象</param>
/// <param name="commandType">命令类型</param>
/// <param name="commandText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="cmdParms">命令参数集合</param>
/// <returns>当前事务查询操作返回的结果集中位于第一行第一列的Object类型的值</returns>
public static object ExecuteScalar(OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
{
if (trans == null)
throw new ArgumentNullException("当前数据库事务不存在");
OracleConnection conn = trans.Connection;
if (conn == null)
throw new ArgumentException("当前事务所在的数据库连接不存在");
OracleCommand cmd = new OracleCommand();
object result = null;
try
{
PrepareCommand(cmd, conn, trans, cmdType, cmdText, cmdParms);
result = cmd.ExecuteScalar();
cmd.Parameters.Clear();
}
catch
{
throw;
}
finally
{
trans.Dispose();
cmd.Dispose();
conn.Close();
conn.Dispose();
}
return result;
}
/// <summary>
/// 执行数据库查询操作,返回结果集中位于第一行第一列的Object类型的值
/// </summary>
/// <param name="conn">数据库连接对象</param>
/// <param name="cmdType">Command类型</param>
/// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="cmdParms">命令参数集合</param>
/// <returns>当前查询操作返回的结果集中位于第一行第一列的Object类型的值</returns>
public static object ExecuteScalar(OracleConnection conn, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)
{
if (conn == null) throw new ArgumentException("当前数据库连接不存在");
OracleCommand cmd = new OracleCommand();
object result = null;
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);
result = cmd.ExecuteScalar();
cmd.Parameters.Clear();
}
catch
{
throw;
}
finally
{
cmd.Dispose();
conn.Close();
conn.Dispose();
}
return result;
}
/// <summary>
/// 执行数据库命令前的准备工作
/// </summary>
/// <param name="cmd">Command对象</param>
/// <param name="conn">数据库连接对象</param>
/// <param name="trans">事务对象</param>
/// <param name="cmdType">Command类型</param>
/// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="cmdParms">命令参数集合</param>
private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, CommandType cmdType, 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 = cmdType;
if (cmdParms != null)
{
foreach (OracleParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
/// <summary>
/// 将.NET日期时间类型转化为Oracle兼容的日期时间格式字符串
/// </summary>
/// <param name="date">.NET日期时间类型对象</param>
/// <returns>Oracle兼容的日期时间格式字符串（如该字符串：TO_DATE('2007-12-1','YYYY-MM-DD')）</returns>
public static string GetOracleDateFormat(DateTime date)
{
return "TO_DATE('" + date.ToString("yyyy-M-dd") + "','YYYY-MM-DD')";
}
/// <summary>
/// 将.NET日期时间类型转化为Oracle兼容的日期格式字符串
/// </summary>
/// <param name="date">.NET日期时间类型对象</param>
/// <param name="format">Oracle日期时间类型格式化限定符</param>
/// <returns>Oracle兼容的日期时间格式字符串（如该字符串：TO_DATE('2007-12-1','YYYY-MM-DD')）</returns>
public static string GetOracleDateFormat(DateTime date, string format)
{
if (format == null || format.Trim() == "") format = "YYYY-MM-DD";
return "TO_DATE('" + date.ToString("yyyy-M-dd") + "','" + format + "')";
}
/// <summary>
/// 将指定的关键字处理为模糊查询时的合法参数值
/// </summary>
/// <param name="source">待处理的查询关键字</param>
/// <returns>过滤后的查询关键字</returns>
public static string HandleLikeKey(string source)
{
if (source == null || source.Trim() == "") return null;
source = source.Replace("[", "[]]");
source = source.Replace("_", "[_]");
source = source.Replace("%", "[%]");
return ("%" + source + "%");
}
}
