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Timeout on SqlDataAdapter Fill to DataTable

Posted on 2014-03-16
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Last Modified: 2014-03-16
I have a query that when run via sql server management studio, it takes 30 seconds. But when I run it within my source code to populate a DataTable, it errors with a timeout.

Here is my code that uses the query to populate the DataTable. It errors right after the Fill:

      Public Function GetDataTable(ByVal sql As String) As DataTable

         Dim con As New SqlConnection(Name.GetConnectionString)
         Dim adapter As New SqlDataAdapter()
         adapter.SelectCommand = New SqlCommand(sql, con)
         Dim myDataTable As New DataTable()
         con.Open()
         Try
            adapter.Fill(myDataTable)
         Finally
            adapter.Dispose()
            con.Close()
         End Try
         Return myDataTable

      End Function

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Is there something wrong with my code above that would cause the same query that runs successfully in SSMS to fail with a web project? It goes straight to the Finally block.

thanks.
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Question by:Starr Duskk
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Fernando Soto earned 2000 total points
ID: 39933019
Hi BobCSD;

Try increasing the CommandTimeout property of the SqlCommand object to see if that helps. Modify your code as shown below.

Dim adapter As New SqlDataAdapter()
Dim cmd As New SqlCommand(sql, con)
' Increase the timeout to a value greater then 30 which is the default. 
' This value is in seconds
cmd.CommandTimeout = 45
adapter.SelectCommand = cmd
Dim myDataTable As New DataTable()

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Author Comment

by:Starr Duskk
ID: 39933061
I did this and it worked too. Is that 6 of one half a dozen of the other, or is the way you just showed me different?

thanks!

         Dim adapter As New SqlDataAdapter()
         adapter.SelectCommand = New SqlCommand(sql, con)
         adapter.SelectCommand.CommandTimeout = 300   ' 3/16/2014
         Dim myDataTable As New DataTable()

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LVL 64

Expert Comment

by:Fernando Soto
ID: 39933117
Yes that is fine as we'll.
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