Asp – HTTP Errors with .Net 3.5 SP1

.net-3.5asp.net

I have a ASP.Net website that is failing on AJAX postbacks (both with ASP.Net AJAX and a 3rd part control) in IE. FireFox works fine. If I install the website on another machine without .Net 3.5 SP1, it works as expected.

When it fails, Fiddler shows that I'm getting a 405 "Method Not Allowed". The form seems to be posting to pages other than page I'm viewing.

The form's action is "#" for the page on the broken website (with SP1). The form's action is "Default.aspx" for the same page on a website without SP1.

Any ideas?

Best Answer

SP1 changes the HtmlForm control so that it honors the action attribute, where previous versions ignored it. It sounds like you have something like this on the broken pages:

<form runat="server" action="#">

Remove the action, and it should be fine:

<form runat="server">

More info here: http://forums.asp.net/t/1305800.aspx

Related Solutions

How to tell if .NET 3.5 SP1 is installed

Look at HKLM\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5\. One of these must be true:

The Version value in that key should be 3.5.30729.01
Or the SP value in the same key should be 1

In C# (taken from the first comment), you could do something along these lines:

const string name = @"SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5";
RegistryKey subKey = Registry.LocalMachine.OpenSubKey(name);
var version = subKey.GetValue("Version").ToString();
var servicePack = subKey.GetValue("SP").ToString();

Asp.net-mvc – Html.AntiForgeryToken() causeing errors after upgrading to .NET 3.5 SP1

Doh, just solved it.

Cleared my browser cache and cookies and everything works fine again.

Best Answer

Related Solutions

How to tell if .NET 3.5 SP1 is installed

Asp.net-mvc – Html.AntiForgeryToken() causeing errors after upgrading to .NET 3.5 SP1

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