732829 - Double postback when using ASP.net Updatepanel and asp:DropDownList (select) with autopostback

Status: RESOLVED INVALID

(Core :: General, defect)

Description

[Troels Jessen]

Attachment: Test.aspx

User Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3; Zune 4.7)

Steps to reproduce:

I have created an aspx page including an updatepanel and one asp:dropdownlist (renders as "select") with autopostback="true". Page is attached.

Mozilla/5.0 (Andoid; Linux armv7l; rv:10.0.2) Gecko/20120515
Firefox/10.0.2 Fennec/10.0.2

Serverside: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272

The page works as expected using other browsers on Android, an using IE and Firefox at Windows.


Actual results:

When I changed the selected item of the select box, the page triggered the javascript postback twice.


Expected results:

The javascript postback should have triggered only once.