Page_PreRender Fires Twice On First Load In Session?
Apr 29, 2010
When I run the web application, I notice that Page_PreRender is fired twice. This only happens the first time in a new session. It does not happen if I refresh the page, or on postbacks. I use .NET framework 3.5 and the built in ajax functionality.
The problem is not related to img tag with empty src attribute (which I have seen other posts with similar problem has mentioned). I know this because I see this in both FireFox and IE. The posts I saw about this stated that this was not a problem in IE. I have also searched and found no img tags with empty src in the generated page source, so it should not be this. I have also made a simple test page where I have included some of the functionality, and this does not happen.
Note: It is the entire page cycle that is firing twice, not just render.
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