C#调用Oracle的公共类，首先得添加引用System.Data.OracleClient，Function:
using System.Data.OracleClient;
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public abstract class OracleHelper { public static readonly string conOraStr = ConfigurationManager.AppSettings["OraConnString"]; private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable()); protected OracleHelper() { } public static void CacheParameters(string cacheKey, params OracleParameter[] commandParameters) { parmCache[cacheKey] = commandParameters; } public static int ExecuteNonQuery(string connectionString, string cmdText) { OracleCommand cmd = new OracleCommand(); OracleConnection conn = new OracleConnection(connectionString); PrepareCommand(cmd, conn, null, CommandType.Text, cmdText, null); int num = cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); return num; } public static int ExecuteNonQuery(OracleConnection connection, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters) { OracleCommand cmd = new OracleCommand(); PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters); int num = cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); return num; } public static int ExecuteNonQuery(OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters) { OracleCommand cmd = new OracleCommand(); PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters); int num = cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); return num; } public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters) { OracleCommand cmd = new OracleCommand(); using (OracleConnection connection = new OracleConnection(connectionString)) { PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters); int num = cmd.ExecuteNonQuery(); connection.Close(); cmd.Parameters.Clear(); return num; } } public static OracleDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters) { OracleDataReader reader2; OracleCommand cmd = new OracleCommand(); OracleConnection conn = new OracleConnection(connectionString); try { PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters); OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection); cmd.Parameters.Clear(); reader2 = reader; } catch { conn.Close(); throw; } return reader2; } public static object ExecuteScalar(OracleConnection connectionString, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters) { OracleCommand cmd = new OracleCommand(); PrepareCommand(cmd, connectionString, null, cmdType, cmdText, commandParameters); object obj2 = cmd.ExecuteScalar(); cmd.Parameters.Clear(); return obj2; } public static object ExecuteScalar(OracleTransaction transaction, CommandType commandType, string commandText, params OracleParameter[] commandParameters) { if (transaction == null) { throw new ArgumentNullException("transaction"); } if ((transaction != null) && (transaction.Connection == null)) { throw new ArgumentException("The transaction was rollbacked\tor commited, please\tprovide\tan open\ttransaction.", "transaction"); } OracleCommand cmd = new OracleCommand(); PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); object obj2 = cmd.ExecuteScalar(); cmd.Parameters.Clear(); return obj2; } public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters) { OracleCommand cmd = new OracleCommand(); using (OracleConnection connection = new OracleConnection(connectionString)) { PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters); object obj2 = cmd.ExecuteScalar(); cmd.Parameters.Clear(); return obj2; } } public static void ExecuteSqlTran(string conStr, List<string> SQLStringList) { using (OracleConnection connection = new OracleConnection(conStr)) { connection.Open(); OracleCommand command = new OracleCommand(); command.Connection = connection; OracleTransaction transaction = connection.BeginTransaction(); command.Transaction = transaction; try { foreach (string str in SQLStringList) { if (!string.IsNullOrEmpty(str)) { command.CommandText = str; command.ExecuteNonQuery(); } } transaction.Commit(); } catch (OracleException exception) { transaction.Rollback(); throw new Exception(exception.Message); } finally { if (connection.State != ConnectionState.Closed) { connection.Close(); } } } } public static bool Exists(string connectionString, string strOracle) { int num; object single = GetSingle(connectionString, strOracle); if (object.Equals(single, null) || object.Equals(single, DBNull.Value)) { num = 0; } else { num = int.Parse(single.ToString()); } if (num == 0) { return false; } return true; } public static OracleParameter[] GetCachedParameters(string cacheKey) { OracleParameter[] parameterArray = (OracleParameter[])parmCache[cacheKey]; if (parameterArray == null) { return null; } OracleParameter[] parameterArray2 = new OracleParameter[parameterArray.Length]; int index = 0; int length = parameterArray.Length; while (index < length) { parameterArray2[index] = (OracleParameter)((ICloneable)parameterArray[index]).Clone(); index++; } return parameterArray2; } public static object GetSingle(string connectionString, string SQLString) { object obj3; using (OracleConnection connection = new OracleConnection(connectionString)) { using (OracleCommand command = new OracleCommand(SQLString, connection)) { try { connection.Open(); object objA = command.ExecuteScalar(); if (object.Equals(objA, null) || object.Equals(objA, DBNull.Value)) { return null; } obj3 = objA; } catch (OracleException exception) { throw new Exception(exception.Message); } finally { if (connection.State != ConnectionState.Closed) { connection.Close(); } } } } return obj3; } public static string OraBit(bool value) { if (value) { return "Y"; } return "N"; } public static bool OraBool(string value) { return value.Equals("Y"); } private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, 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 = CommandType.Text; if (cmdParms != null) { foreach (OracleParameter parameter in cmdParms) { if (((parameter.Direction == ParameterDirection.InputOutput) || (parameter.Direction == ParameterDirection.Input)) && (parameter.Value == null)) { parameter.Value = DBNull.Value; } cmd.Parameters.Add(parameter); } } } private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, CommandType cmdType, string cmdText, OracleParameter[] commandParameters) { if (conn.State != ConnectionState.Open) { conn.Open(); } cmd.Connection = conn; cmd.CommandText = cmdText; cmd.CommandType = cmdType; if (trans != null) { cmd.Transaction = trans; } if (commandParameters != null) { foreach (OracleParameter parameter in commandParameters) { cmd.Parameters.Add(parameter); } } } public static DataSet Query(string connectionString, string SQLString) { using (OracleConnection connection = new OracleConnection(connectionString)) { DataSet dataSet = new DataSet(); try { connection.Open(); new OracleDataAdapter(SQLString, connection).Fill(dataSet, "ds"); } catch (OracleException exception) { throw new Exception(exception.Message); } finally { if (connection.State != ConnectionState.Closed) { connection.Close(); } } return dataSet; } } public static DataSet Query(string connectionString, string SQLString, params OracleParameter[] cmdParms) { DataSet set2; using (OracleConnection connection = new OracleConnection(connectionString)) { OracleCommand cmd = new OracleCommand(); PrepareCommand(cmd, connection, null, SQLString, cmdParms); using (OracleDataAdapter adapter = new OracleDataAdapter(cmd)) { DataSet dataSet = new DataSet(); try { adapter.Fill(dataSet, "ds"); cmd.Parameters.Clear(); } catch (OracleException exception) { throw new Exception(exception.Message); } finally { if (connection.State != ConnectionState.Closed) { connection.Close(); } } set2 = dataSet; } } return set2; } } |
