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Dear All,
I am using Ajax 4.0 and VS 2010 but I could not find UpdatePanel in it. Where is the UpdatePanel in 2010 and how can I use it? Any ideas are welcome!
Updated 19-Dec-10 20:33pm
JF2015 20-Dec-10 2:33am    
Edited to fix spelling errors.

1 solution

Just look for it in 'AJAX Extensions' Tab in the toolbox.

Apart from that, you can even type that directly in your ASPX. Try pasting,
<asp:UpdatePanel ID="upExplorer" runat="server" UpdateMode="Conditional">
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Abdul Rahman Hamidy 20-Dec-10 3:25am    
thanks for the answer, by using your code I am getting following error.
Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; .NET CLR 4.0.20506; InfoPath.2; OfficeLiveConnector.1.3; OfficeLivePatch.0.0; .NET CLR 3.0.30729)
Timestamp: Mon, 20 Dec 2010 08:23:18 UTC

Message: Sys.ArgumentNullException: Value cannot be null.
Parameter name: panelsCreated[1]
Line: 157
Char: 12
Code: 0
URI: http://localhost/SDU/ScriptResource.axd?d=gQgpR5F8qu4oPmkOpa5XkrxL93OFrscRfouwGkMdV20T7RjaxoTo68z7D3O5mNPL2CVokMHFmkhpm3Nbw3D0GA2&t=11e6618b

and bellow is my code in page
<asp:ToolkitScriptManager ID="ToolkitScriptManager2" runat="server" EnablePartialRendering="true">
<div runat="server" id="dvContent">
<asp:UpdatePanel ID="upExplorer" runat="server" UpdateMode="Conditional">

Sandeep Mewara 20-Dec-10 3:28am    
1. You missed content template in Update panel
"ContentTemplate" - see my example.

2. Make sure your website is AJAX enabled (Config related to AJAX extensions present in your Web.config)
Abdul Rahman Hamidy 20-Dec-10 4:52am    
I have other pages which is working correctly, they also have ajax accordian, ComboBox and other controls.

in this page I dont know what is going wrong, I am getting this error only when i add UpdatePanel, if i add other ajax 4.0 controls then no error appears.

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