C#工具类OracleHelper（c# oracle数据库）

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基于Oracle.ManagedDataAccess.Client封装，可以直接使用

using System;
using System.Data;
using System.Collections.Generic;
using System.Configuration;
using System.Text;
using System.IO;
using Oracle.ManagedDataAccess.Client;
//using System.Data.OracleClient; System.Data.OracleClient类已经不推荐使用
namespace Fly.Util.DataBase
{
 /// <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 + "%");
 }
 /// <summary>
 /// 执行存储过程
 /// </summary>
 /// <param name="connection">SqlServer数据库连接对象</param> 
 /// <param name="storedProcName">存储过程名</param>
 /// <param name="parameters">存储过程参数</param>
 /// <returns>SqlDataReader对象</returns>
 public static OracleDataReader RunStoredProcedure(OracleConnection connection, string storedProcName, IDataParameter[] parameters)
 {
 OracleDataReader returnReader = null;
 connection.Open();
 OracleCommand command = BuildSqlCommand(connection, storedProcName, parameters);
 returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
 return returnReader;
 }
 /// <summary>
 /// 构建SqlCommand对象
 /// </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>SqlCommand</returns>
 private static OracleCommand BuildSqlCommand(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;
 }
 }
}

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