/// <summary> /// 执行SQL语句 /// </summary> /// <param name="sql">SQL</param> public DataSet ExecSql(string sql) { DataSet result = new DataSet(); using (_DbHelper conn = new _DbHelper(_conn)) { conn.Open(); try { result = conn.ExecuteDataSet(sql); } catch (Exception err) { throw err; } finally { conn.Close(); } } return result; }