Why bother? If you use the default Ajax timeout setting, which is 110 seconds (or 90 seconds for .Net framework 1.0/1.1), users may get the timeout error, especially when they are using the web application with a slow network connection.
In order to set the AJAX timeout settings, you would need to check three things in your code
1) add below code in the web.config file - for example to set it to 10 minutes (600 seconds).
- <httpRuntime executionTimeout="600" maxRequestLength="40960"/>
2) this above executionTimeout setting only applies if you set the "debug" attribute in the <Compilation> tag to "False" in the web.config. Here is the reference
- http://msdn.microsoft.com/en-us/library/e1f13641.aspx
3) you would also need to set AsyncPostBackTimeout in the aspx page (or the site.master page) to match with the setting in the web.config file.
- <asp:ScriptManager ID="ScriptManager1" runat="server" AsyncPostBackTimeout="600">
...
</asp:ScriptManager>
This is one type of hidden bugs, if your developer's or QC's network speed is faster than your end-users. :)
Of course, you would also need to watch out the timeout settings for your website and web services, if any.