Debugging WPF Browser Applications Gives Download File

Question

I created an application for my college work in a WPF browser, but when I try to debug, Firefox opens and gives me a download of the xbap file that should run in the browser. This happens in VS2008 Express and VS2010 beta. I tried in Internet Explorer and Chrome with the same result..NET Framework installed right up to version 4.0. This did not happen before I started using Windows 7, but that should not matter much, right? Any ideas? Thanks

Answer 1

Check the MIME type settings in IIS. In earlier versions of Windows, it was somewhat obscure to search in the user interface, but in 7 it is easy: Start → IIS Search → select IIS Manager → filter for MIME.

The following types must be configured:

MIME Type                        Extension
application/manifest             .manifest
application/x-ms-xbap            .xbap
application/octet-stream         .deploy
application/x-ms-application     .application
application/vnd.ms-xpsdocument   .xps
application/xaml+xml             .xaml

(taken here: http://www.xbap.org/faq.html )

Answer 2

Firefox launches XBAP using the dll from the .Net 3.5 installer, and since Windows 7 ships with 3.5 already installed, this DLL is not available

The solution is to copy the file C:\WINDOWS\Microsoft.NET\Framework\v3.5\Windows Presentation Foundation\NPWPF.dllfrom the XP computer to C:\Program Files (x86)\Mozilla Firefox\plugins(if the plugin folder does not exist, create it)