AJAX :: Hidden Or Shown AsyncFileUpload Control Does Not Fire Server-Side

May 27, 2010

I recently came across the AsyncFileUpload control in the latest (3.0.40412) release of the ASP.Net Ajax Control Toolkit. There appears to be an issue when using it in a hidden control that is later revealed, such as a tag with

[Code]....

Server-side Code -
[Code]....

I have a breakpoint on the UploadedComplete event but it never fires. However, if you take the AsyncFileUpload control out of the , making it visible at initial page render, the control works as expected.

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