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I am changing the contents of a span with javascript. I can see that it has changed with view source.
When I try to get the contents in a c# function right after, it still has the old value.
My guess is that asp is just seeing the html that it sent the client, and that javascript is changing the client html of which asp cannnot see?
this was my only guess on how to explain it. Would this be correct?
Thanks.
Yes, your guess is correct!
Javascript sees only the client side and ASP.NET only the server side. If you make some change on the client side and you want to server side to be aware of that change, you can make use of AJAX.
See Ajax for more info.
In .NET you can use a WebService, a Controller, or a Page for receiving the ajax call.