Silverlight Cache Control: Using revision number in url for XAP causes HyperLink to crash SL App!

Question

Hi there,

To make sure all our customers receive the latest Silverlight App, we are placing the new revision number on the url for XAP file as follows:

<param name="source" value="/ClientBin/ShoeboxViewer.xap?v=5" />

Problem is when we do this, all HyperLink controls (in the Silverlight App) that use relative URLs, throw an internal error when clicked. Here's the stack trace:

Unhandled Error in Silverlight 2 Application Specified argument was out of the range of valid values. Parameter name: baseUri at System.Uri..ctor(Uri baseUri, Uri relativeUri) at System.Windows.Controls.HyperlinkButton.GetAbsoluteUri() at System.Windows.Controls.HyperlinkButton.Navigate() at System.Windows.Controls.HyperlinkButton.OnClick() at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e) at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e) at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName)

If I remove the querystring, it works fine.

Can anyone help?

Cheers, Ash.

Answer 1

The problem is actually that HyperlinkButtons can't use relative urls. I ran into this just the other day. It's a hack, but I got it to work by adding a click handler to the HyperlinkButton and then calling HtmlPage.Navigate, passing in a uri marked as relative

Answer 2

Jacob is right - you might also want to look at this solution to fixup relative URLs.