Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
Solved Archived

UpdatePanel content is not rendered in Firefox 42 after second partial postback

omerbonfil

I'm Using Firefox 42 (Code works fine in IE9,10,11 and Chrome).

Consider three DropDownLists dependent upon each other inside an ASP.net UpdatePanel. A, B, C.

When I change A, B values are populated properly. I then go to change B, C values are not populated.

The partial postback occurs, I can see the codebehind filling C properly, but the changes are not rendered in the UI.

I then continued to do another test.

I changed B values and C values populated properly. I then went and changed A, B values did not update.

Which led to the conclusion that the problem is rendering of the content on the second partial postback.

Anyone has any idea what is causing this?

I'm Using Firefox 42 (Code works fine in IE9,10,11 and Chrome). Consider three DropDownLists dependent upon each other inside an ASP.net UpdatePanel. A, B, C. When I change A, B values are populated properly. I then go to change B, C values are not populated. The partial postback occurs, I can see the codebehind filling C properly, but the changes are not rendered in the UI. I then continued to do another test. I changed B values and C values populated properly. I then went and changed A, B values did not update. Which led to the conclusion that the problem is rendering of the content on the second partial postback. Anyone has any idea what is causing this?

All Replies (1)

Chosen Solution

Just in case anyone meets this problem.

Problem was a bug in AjaxControlToolkit AsyncFileUpload Component which was related only to Firefox. updating the Toolkit to the latest version fixed the issue.

DevExpress Ajax Control Toolkit