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Editorial Team
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Asked: 2026-05-19T09:58:57+00:00

I just installed VS 2010 Beta 2 and wanted to play with an ASP.NET

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I just installed VS 2010 Beta 2 and wanted to play with an ASP.NET MVC 2 project. I simply added some script (alert('hello');) into the Home controller’s index.aspx view, and I can see it executing. When I try to set a breakpoint, however, it never gets hit. I also tried to use the “debugger” keyword, and when I do, I get a disappointing “there is no source code available for the current location” message. I also get this message when I try to independently attach to an IE process where my app is running.

What do I need to do to get a friendly script debugging experience? (I have successfully used Firebug to debug this, but for some reason I prefer the VS debugger.)

Here are some details of my configuration:

  • I am launching my stuff in VS 2010 Beta 2.
  • IE8 version 8.0.7600.16385 is my default browser.
  • The “Disable script debugging (Internet Explorer)” advanced option is unchecked.
  • The “Disable script debugging (Other)” option is unchecked.
  • In my ASP.NET MVC 2 project’s “web” properties tab, the ASP.NET debugger is checked. All others are unchecked.
  • Visual Studio 2008 script debugging seems to work just fine.
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1 Answer

  1. Editorial Team

    The debugger cannot debug both Silverlight code and Script code at the same time, if the Silverlight debugger is selected JavaScript debugging is switched off.

    1. Go to the Project’s Properties (Alt+Enter).
    2. For a Web Site Project: Select “Start Options”. Or for a Web Appliction: Go to the Web tab and at the bottom you will see the Debuggers option.
    3. Check that the Silverlight checkbox is NOT ticked if you want to be able to debug JavaScript. (It is unfortunate that the UI here is not clear about this side effect.)
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