Cannot update .Text property of asp:TextBox inside asp:UpdatePanel

Question

I have several dropdownlists and textboxes inside an <asp:UpdatePanel>, which should let me edit some details after selecting an item inside an <asp:GridView>. The grid is not inside the updatepanel.

From the UpdatePanels' .Load() method, I change the .Text of a few <asp:Label>, <asp:TextBox>, and I set the .SelectedValue of some <asp:DropDownList>.

All labels are updated correcly, but the new .Text of the <asp:TextBox> and .SelectedValue of <asp:DropDownList> are not visible in the HTML output. After setting the new value, I can see that it has been set with QuickWatch from Visual Studio.

What is causing this, and how can I solve my problem?

I am using Visual Studio 2008 with .Net 3.5

Answer 1

I think the problem is when you select an item in the <asp:GridView> nothing is being posted back to the server? Is autopostback on?

In addition you need to set the update panel trigger to postback (and hence get the new value) whenever a selection is made in <asp:GridView>.

Please comment if I've got the wrong end of the stick.

Answer 2

Dude, just set the .Text in your UpdatePanels PreRender() method. It will solve your problems.

...... Thanks for all the help, guys. ;)