/// <summary> /// 通过查询语句填充表 /// </summary> /// <param name="connectionString"></param> /// <param name="cmdType"></param> /// <param name="cmdText"></param> /// <param name="commandParameters"></param> /// <returns></returns> public static DataTable FillDataTable(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters) { // Create a new Oracle command DataTable _dt = new DataTable(); //Create a connection using (OracleConnection connection = new OracleConnection(connectionString)) { try { OracleCommand cmd = new OracleCommand(); //Prepare the command PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters); //Execute the command using (OracleDataReader rdr = cmd.ExecuteReader()) { FillTableByReader(_dt, rdr); rdr.Close(); } cmd = null; } catch (Exception e) { string _errmsg = string.Format("执行SQL语句出错,错误信息为:{0}!\n类型:{1}\n查询语句为:{2}\n参数:", e.Message, cmdType, cmdText); if (commandParameters != null) { foreach (OracleParameter _p in commandParameters) { _errmsg += string.Format("{0}={1}\n", _p.ParameterName, _p.Value.ToString()); } } OralceLogWriter.WriteSystemLog(_errmsg, "ERROR"); connection.Close(); throw; } finally { connection.Close(); } } return(_dt); }
/// <summary> /// 通过查询语句取数据到DataSet /// </summary> /// <param name="_selectStr"></param> /// <param name="_tableName"></param> /// <returns></returns> public static DataSet FillDataSet(string _selectStr, string _tableName) { OracleDataReader rdr; DataSet _ds = new DataSet(); using (OracleConnection cn = OpenConnection()) { try { OracleCommand _cmd = new OracleCommand(_selectStr, cn); DataTable _dt = new DataTable(_tableName); using (rdr = _cmd.ExecuteReader()) { try { FillTableByReader(_dt, rdr); rdr.Close(); } catch { rdr.Close(); throw; } } _ds.Tables.Add(_dt); _ds.AcceptChanges(); } catch (Exception e) { string _errmsg = string.Format("执行SQL语句出错,错误信息为:{0}!\n查询语句为:{1}\n:", e.Message, _selectStr); OralceLogWriter.WriteSystemLog(_errmsg, "ERROR"); throw e; } finally { cn.Close(); } } return(_ds); }
/// <summary> /// Execute a OracleCommand (that returns a 1x1 resultset) against the specified SqlTransaction /// using the provided parameters. /// </summary> /// <param name="transaction">A valid SqlTransaction</param> /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">The stored procedure name or PL/SQL command</param> /// <param name="commandParameters">An array of OracleParamters used to execute the command</param> /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns> 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 or commited, please provide an open transaction.", "transaction"); } // Create a command and prepare it for execution try { OracleCommand cmd = new OracleCommand(); PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); // Execute the command & return the results object retval = cmd.ExecuteScalar(); // Detach the SqlParameters from the command object, so they can be used again cmd.Parameters.Clear(); return(retval); } catch (Exception e) { string _errmsg = string.Format("执行SQL语句出错,错误信息为:{0}!\n类型:{1}\n查询语句为:{2}\n参数:", e.Message, commandType, commandText); if (commandParameters != null) { foreach (OracleParameter _p in commandParameters) { _errmsg += string.Format("{0}={1}\n", _p.ParameterName, _p.Value.ToString()); } } OralceLogWriter.WriteSystemLog(_errmsg, "ERROR"); throw e; } }
/// <summary> /// Execute an OracleCommand (that returns no resultset) against an existing database transaction /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders", new OracleParameter(":prodid", 24)); /// </remarks> /// <param name="trans">an existing database transaction</param> /// <param name="cmdType">the CommandType (stored procedure, text, etc.)</param> /// <param name="cmdText">the stored procedure name or PL/SQL command</param> /// <param name="commandParameters">an array of OracleParamters used to execute the command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters) { try { OracleCommand cmd = new OracleCommand(); PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters); int val = cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); return(val); } catch (Exception e) { string _errmsg = string.Format("执行SQL语句出错,错误信息为:{0}!\n类型:{1}\n查询语句为:{2}\n参数:", e.Message, cmdType, cmdText); foreach (OracleParameter _p in commandParameters) { _errmsg += string.Format("{0}={1}\n", _p.ParameterName, _p.Value.ToString()); } OralceLogWriter.WriteSystemLog(_errmsg, "ERROR"); throw e; } }