Register XAP file extention in IIS

Posted March 7, 2008
Filed under: Uncategorized | Tags: , , , |

If you are having problems loading a Silverlight 2.0 application, and you have exhausted all options, you may need to register the XAP file extension in IIS. I banged my head against the wall (well, not really) trying to figure out why my application wasn’t loading. It turns out to be a simple fix. Register the MIME type for .xap to application/x-silverlight-app.

Below are screen shots of where to find MIME type in IIS7.

Xap MIME TypeMIME type in IIS 7

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14 comments so far

  1. Al on March 7, 2008

    Thanks! I had almost given up getting the Silverlight 2.0 beta app to show up after publishing.

    Reply
  2. Dew Drop - March 8, 2008 | Alvin Ashcraft's Morning Dew on March 8, 2008

    [...] Register XAP File Extension in IIS (Corey Schuman) [...]

    Reply
  3. .net noobie on March 15, 2008

    This also had me stummped for a while, thanks for the info, I have a shared hosting account to play with this stuff and the support guys there also had no idea…

    ok, Thanks again
    Eat Well, Be Happy and Live Long… ;)

    Reply
  4. Kinga on March 20, 2008

    Hi,
    Does it work also on IIS 6? Because you mentioned IIS7…
    Thank you,
    Kinga

    Reply
  5. Felix on March 31, 2008

    typo: application\x-silverlight-app should be application/x-silverlight-app.

    Reply
  6. cschuman on March 31, 2008

    Thanks Felix, updated the typo.

    Reply
  7. Dmytro Mindra on April 11, 2008

    Thank you for information! Yes, it works on IIS 6. I hope that guys from Microsoft will fix this issue.

    Reply
  8. Decompiling Silverlight 2 Apps – Enter the XAP - .Net World on April 25, 2008

    [...] blog (inc. screenshots). Note that if your web server is on IIS (prior to version 7) you need to register that MIME type. As an aside, my web server happens to be Apache (shocking I know!) and I had to configure nothing [...]

    Reply
  9. Videos En Mi Blog : La Bitácora on June 30, 2008

    [...] Como agrgar una extensión mime a su servidor web (si es que reciben un error de archivo no encontrado al tratar de descargar el archivo .xap) [...]

    Reply
  10. bill staples on July 9, 2008

    Here are instructions for IIS6 and IIS7, with scripts: http://learn.iis.net/page.aspx/262/silverlight/

    Reply
  11. Tim Anderson’s ITWriting - Tech writing blog » Testing a web service with IIS 7 on Vista on July 16, 2008

    [...] and  handler mappings were not configured for Silverlight and WCF. How to fix the mime type is here and the handler mappings, [...]

    Reply
  12. Sambo on August 12, 2008

    Great point, thank.

    Reply
  13. Felipe Alba on September 10, 2008

    Hi, Im having troubles with silverlight, I can’t download the .xap, I have tried everything, the mime types, changing the extension of the .xap file to .zip or .dll, and it doesn work.

    Please help

    Reply
  14. Drogna on September 22, 2008

    Finally, a simple and easy to follow tip which works

    Reply

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