SqlDataReader and SqlCommand

Question

I have the following code.

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();
   }
}

but this causes the following exception...

System.InvalidOperationException: There is already an open DataReader associated with this Command which must be closed first.

I need to read each row returned, do some validation on the data and make an update if necessary, then continue to the next record. How can I achieve this if I can't use a SqlCommand while looping through reader.Read() ?

Answer 1

Could be as simple as amending your connection string:

add MultipleActiveResultSets=True to connection string