Last week I had a problem when I tried to use advance smart search panel in my
code. I got this error: "Sys.WebForms.PageRequestManagerTimeoutException.
The server request timed out" from the Ajax Extension framework. Its occurred
because the smart search took a little longer time (something like 2 minutes) and
the Ajax Extension Callback framework had a timeout.
How to solve this problem?
To solve this problem we can increase the timeout. You can change the timeout
time by adding a new property to the script manager control. This property is
called AsyncPostBackTimeOut and it can help us to define the number of
seconds before the request will throw a request timeout exception*.
For example if you want that the timeout will take maximum 10 minutes your
code should be look like this:
<asp:ScriptManager ID="ScriptManager1" runat="server"
AsyncPostBackTimeOut="600" >
asp:ScriptManager>
