SqlDataReader和SqlCommand

Question

我有以下代码.

using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString))
{
   connection.Open();
   SqlCommand select = new SqlCommand("SELECT RTRIM(LTRIM(PART_NO)) AS PART_NO, record FROM [RMAData].[dbo].[IMPORTING_ORDER_EDI] WHERE sessionID = '" + Session.SessionID + "'", connection);

   SqlDataReader reader = select.ExecuteReader();

   if (reader.HasRows)
   {
      while (reader.Read())
      {
         if (!currentPart.IsActive)
         {
            // this part is not active, set the active flag in sql to 0
            SqlCommand update = new SqlCommand("UPDATE [RMAData].[dbo].[IMPORTING_ORDER_EDI] SET valid = 0, active = 0 WHERE record = " + reader["record"].ToString() + ";", connection);

            update.ExecuteNonQuery();
         }
         else
         {
            ///blah
         }
      }

      reader.Close();
   }
}

但这会导致以下异常......

System.InvalidOperationException:已经有一个与此命令关联的打开DataReader,必须先关闭它.

我需要读取返回的每一行,对数据进行一些验证并在必要时进行更新,然后继续下一条记录.如果我不能使用SqlCommandwhile循环,我怎样才能实现这一目标reader.Read()？

Answer 1

可以像修改连接字符串一样简单:

将MultipleActiveResultSets = True添加到连接字符串