This _postbacksettings async is null

ToolbarButton to AjaxControlToolkit. You may also read the official complete migration guide. However, it does not work on Firefox This will trigger a page reload instead of an AJAX call. In Firefox v I did some research related to the Firefox-specific page reload and seems none of them were talking about the issue I met.

I tried to study the fundamentals of this PostBack behaviour. Net DropDownList. When using the ScriptManager i. Here is the complete snippet:. EventName is optional here but since I just want this trigger to listen the SelectedIndexChanged event, I add them all. User posted I believe that's because the browser is being "helpful" and trying to automatically submit the form for you. The fact that it goes away when you add another control sounds like a typical behavior when this is going on.

Thursday, March 29, PM. User posted I've just experienced a similar problem although not involving PopupControls. Monday, April 30, AM. User posted I still get this error with the latest ASP. Even with ASP. Tuesday, May 8, AM. User posted I am also getting same issue.

I was using some old verion of ajax. Please provide me solution as I am using this control in many forms. Monday, June 25, AM. User posted This was my problem too. Wednesday, July 4, PM. But does this affect my asp. User posted ctafield 's solution worked for me too.

Tuesday, July 31, PM. Wednesday, August 1, AM. Tuesday, October 23, PM. Best regards. Alabi form Brazil. Friday, January 11, PM. User posted I encountered the same problem when using carriage return in the textbox field. So, long story short, I placed the following code; Me. Add "onKeyDown" , "if event. Friday, February 22, PM.

User posted cheers guys I got the solution. This is what helped me out in my case. Thursday, May 1, AM. User posted It's not limited to an ajax popup control. Billy's solution of adding an additional textbox display:none solved the problem. Wednesday, July 30, PM.

User posted Haven't seen this as a possible fix so here it is: I had this problem and tried all the fixes that I found on several different websites and nothing worked, or nothing worked well enough for me. Thursday, September 4, AM. User posted Just as extra information for anyone trying to solve this. Friday, September 12, PM. User posted Hi All, I would here like to explain you all why i feel this issue happens so that its easy for anyone to identify the issue and fix it in an easy way And also a senario where i fixed it.

Hope this helps. Please validate my understanding also. Tuesday, May 26, AM. User posted David,. I used an asp:image and solved my problem.

Wednesday, June 3, AM. User posted nice suggestion. I have report on my asp page and every time I change a filter and click view report, I get this error: Microsoft JScript runtime error: 'this.

Can you give a little moreinfo? I am having the same problem. I am using Reporting Services and the new report viewer control. My report page is inside a Master Page, and my master page has a script manager on it.

Add a comment. Active Oldest Votes. I discovered another solution to this problem. Andre Andre 41 2 2 bronze badges. Gorgsenegger Gorgsenegger 6, 4 4 gold badges 48 48 silver badges 87 87 bronze badges. Sunil Pandey Sunil Pandey 21 3 3 bronze badges. The thing was that on client click I was cancelling the next javascript events with this code: event. I got this problem just now and found a solution by accident.

JavaScript ordering problems? Robin Malmberg Robin Malmberg 11 1 1 bronze badge. Very strange, but your comment just fixed the very same problem I had with master pages and pages with no update panels.

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