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  • 0 comments  /  posted by  Silverlight Show  on  Jun 11, 2010 (1 week ago)
    Tim Heuer is discussing the issue of hosting Silverlight applications (XAPs) on your site that are from a different domain.

    What I mean here is that your site ( has an <object> tag for Silverlight plugin that has the Source parameter set to  This is essentially the cross-domain hosting situation.  What happens in this situation is that the plugin loads but the app does not, presenting in just a big blank space where the app should be.

    A recent head-banger sent me a note and I sent him my items to check on how to solve this.  I thought I’d share.

  • 0 comments  /  posted by  Silverlight Show  on  Dec 18, 2009 (6 months ago)
    In this article Gill Cleeren is looking at cross-domain access to a service in Silverlight 4’s trusted applications.

    As you may know, when accessing any service located in a domain different from the one in which the Silverlight application itself is hosted, Silverlight will check for a cross domain file being in place. Cross-domain policies prevent Silverlight applications to connect with services that are not in the same domain. However, a service can opt-in to be connected to if at the root of the domain, a cross-domain policy file has been deployed. Silverlight will check for its existence (the file should be named clientaccesspolicy.xml or crossdomain.xml, which is the cross-domain file of Flash) and if found, Silverlight will connect in a cross-domain manner.

  • Problems With The Clientaccesspolicy.xml For Silverlight Access to HTTPS

    0 comments  /  posted by  Silverlight Show  on  Jun 30, 2009 (11 months ago)
    Tags: HTTPS , Applications , Security , Cross-Domain

    Al Pascual had some difficulties with the solution of his clientaccesspolicy problems and asks if anyone could give him a hand.

    I deployed a Silverlight application that needs to access HTTPS resources, for the deployment of course I read the guidelines to declared on the clientaccesspolicy file the https explicitly. [...]

    On some of my previous posts I explain my frustration believing that Silverlight was not able to read the security cookie to send it at each request, until a change was made to the client access policy file to do not state explicitly that HTTPS had access to that resource.

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