.net简单的三层实现功能(12)

345         {
346             try
347             {
348                 DbConnection connection = GetConnection();
349                 DbCommand command = GetCommand(sqlCommand, CommandType.Text, connection);
350                 foreach (KeyValuePair<string, object> p in parameters)
351                 {
352                     command.Parameters.Add(GetParameter(p.Key, p.Value, command));
353                 }
354                 connection.Open();
355                 DbDataReader reader = command.ExecuteReader(CommandBehavior.CloseConnection);
356                 command.Parameters.Clear();
357                 return reader;
358             }
359             catch (Exception ex)
360             {
361                 Console.Write("" + ex.Message);
362                 return null;
363             }
364         }
365
366         /// <summary>
367         /// 返回DataTable对象
368         /// </summary>
369         /// <param name="safeSql"></param>
370         /// <returns></returns>
371         public static DataTable GetDataSet(string safeSql)
372         {
373             /*DbProviderFactory _factory = DbProviderFactories.GetFactory(providerName);