Error: Could not download silverlight application. Check web server settings

Question

Developing a silverlight page in already existing web application for previewing video files. When I create a asp.net application locally and add silverlight application on the solution it works perfectly. But while I am trying to include into already existing project it throws this error. I have not deployed into the IIS. this happens while debugging.

Answer 1

Check the path to your xap file in your webpage. It should be something like:

 /ClientBin/my.xap

Also ensure that your xap file is actually in the ClientBin folder. In the web application Properties, choose the Silverlight Applications tab and add the silverlight project to the list.

Although probably not applicable in your case, this can also occur if you are using iis and haven't registered the correct mime type for .xap files. It should be set to application/x-silverlight-app.

Answer 2

This is little same with another answer, but I give my detailed solution with image of setting.

In my case, one of my aspx page will load Zip and Xap files under ClientBin Folder, normally it'll load 20 Zip/Xap files under ClientBin\,

But I found that when building/publishing the project, the Zip/Xap files are NOT output to ClientBin\, that is ClientBin folder is nearly empty.

So my solution is to let the Zip/Xap files output to ClientBin\, to do this, the setting way can see this article:

https://social.msdn.microsoft.com/Forums/silverlight/en-US/d8e2c92a-4b31-4e4b-a440-4960a8d475b4/how-to-generate-xap-file?forum=silverlightstart

Besides here is the screenshot of my setting, that is Right click at your Silverlight project > Properties > Silverlight Application, and you can click the Add button to add content,