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Silverlight 5 - OOB install/update broken when using anti-cache trick

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天命终不由人
天命终不由人 2020-12-21 09:53

I was using the timestamp trick on the Silverlight (see GetLastWriteTime() using answers in How do you force Firefox to not cache or re-download
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  • 臣服心动
    臣服心动 (楼主)
    2020-12-21 10:20

    I suspect this has something to do with the builtin Cassini / Visual Studio Development server and SL5 not playing nicely together for some reason.

    I'm also using the anti-cache trick you mentioned and I was experiencing the same behavior of Application.Current.InstallState always reporting NotInstalled as well as CheckAndDownloadUpdateAsync() always reporting e.UpdateAvailable = true.

    So I changed my web project configuration to use IIS Express instead of the the builtin Visual Studio Development server and re-installed the Silverlight app to the desktop. Finally, everything started working as expected. In order words Application.Current.InstallState = Installed and CheckAndDownloadUpdateAsync() is reporting e.UpdatedAvailable = false.

    Update:

    Sorry, didn't see that you're experiencing this as well on live IIS deployments.

    Update 2:

    My anti-cache HTML as requested:

    
    
      <%
          string source = @"~/ClientBin/EskomVDT.SL.xap";
          string param;

          if(System.Diagnostics.Debugger.IsAttached) {
              param = "";                                   
          }
          else {
              string xapPath = HttpContext.Current.Server.MapPath(source);
              DateTime xapCreationDate = System.IO.File.GetLastWriteTime(xapPath);

              param = "";
          }

          Response.Write(param);
      %>
      
      
      
      
      
          Get Microsoft Silverlight

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