ExecuteNonQuery within the loop of a datareader

[Guest]

Hello,

How can I use an ExecuteNonQuery within the loop of a datareader?
My code is as follows:

Dim cmdToProcess As New SqlClient.SqlCommand
Dim rdToProcess As SqlClient.SqlDataReader

With cmdToProcess
.CommandText = " SELECT * FROM tblDetails "
.Connection = cn
End With

rdToProcess = cmdToProcess .ExecuteReader

Select Case rdToProcess
Case True
Do
'here I want to add or update data
Dim cmdToChange As New SqlClient.SqlCommand

With cmdToChange
.CommandText = "INSERT INTO tblNew(AD_Action) VALUES (@Action)"
.Parameters.AddWithValue("@Action", rdToProcess("DE_Number"))
.Connection = cn
End With

cmdToChange.ExecuteNonQuery
Loop until not rdProcess.Read
End Select

At "cmdNieuweCafetariaActiedetail.ExecuteNonQuery", I get the message that I
have to close the first datareader in order to

execute, but then my code cannot proceed because rdToProcess("DE_Number")
can no longer be read.

How can I solve this?

Many thanks and greetings for your help,

Michel

 

[Guest]

Michel,

Try running the ExecuteNonQuery on a connection different than the one being
used by the data reader.

Kerry Moorman

 

[Miha Markic]

As Kerry mentioned, use another conneciton instance.
There is another option with Sql Server - MARS. Here is a post that explains
it:
http://blogs.msdn.com/dataaccess/archive/2005/08/02/446894.aspx

 

[William Vaughn]

Wait a sec. While it's possible to use MARS and such, it's silly to pull the
rows down from the system to build an INSERT statement. Even JET can execute
a INSERT based on the values supplied with a SELECT or an expression or
both. Do all of this work on the server with the database engine. That's
what its for.

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[Brandon Gano]

I agree. Michel, google "select into" to learn how to insert data directly
from one table to another.