基于Oracle.ManagedDataAccess.Client封装的Oracle工具类OracleHelper，代码如下：
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; } } }