Javascript – How to return data after AJAX postback back to the client in ASP.NET

ajaxasp.netjavascriptpostback

I have a simple question – I use update panel with custom server control inside. I call __doPostBack from javascript and RaisePostBackEvent on the server fires (I implement IPostBackEventHandler).
This is client to server call. Could I return data back to the client (after this partial postback)? What is the best way to achieve this?

Thank you!

Best Answer

Heko, Have you followed the postback in debug mode yet? If you're using IE with client debugging enabled, you may be able to follow the partial postback in both client and server.

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There's a lot of ways this can fall apart. Are you adding the control to the page dynamically in code behind? If so alot of times your UniqueID can be off - even though the client id's are equal. Do you have a code sample that might demonstrate what you're doing?

Javascript – How to force clients to refresh JavaScript files

As far as I know a common solution is to add a ?<version> to the script's src link.

For instance:

<script type="text/javascript" src="myfile.js?1500"></script>

I assume at this point that there isn't a better way than find-replace to increment these "version numbers" in all of the script tags?

You might have a version control system do that for you? Most version control systems have a way to automatically inject the revision number on check-in for instance.

It would look something like this:

<script type="text/javascript" src="myfile.js?$$REVISION$$"></script>

Of course, there are always better solutions like this one.

Best Answer

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