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Ok, hopefully someone can help

 I have a page, detail.aspx that is built on a masterpage.  The page contains an updatepanel (upTopNav) and panel (panel1)  that holds a textbox control (txt_vendor_ID) and a button.  The button click event has a postback URL of report.aspx.  I'm trying to find the control that is nested within the updatepanel, but I can't seem to get a value placed. I don't want to declare a page directive to use strongtype for the control, as I will have several pages doing a similar postback.

 I'm trying this

 If Not Page.PreviousPage Is Nothing Then
            Dim SourceTextBox As New TextBox
            SourceTextBox = CType(PreviousPage.FindControl("txt_vendor_ID"), TextBox)
            Vendor_ID = SourceTextBox.Text
Else
            Vendor_ID = txt_vendor_ID.Text
End If

 Any thoughts?

Hi,

This is a problem with FindControl. Text from help: "The FindControl method searches only the page's immediate, or top-level, container; it does not recursively search for controls in naming containers contained on the page"

The solutions are:

1. Use FindControlRecursive (you can find some code with google, or write yourself) instead of FindControl

2. Through exact path to the control, for example (ContentPage with Panel with TextBox)

Kampak,

Thanks, that was very helpful. and solved the problem. I used the first example.

Dave