Unknown element: Canvas.RenderTransform.

2 posts, 0 answers
  1. Eric Moreau
    Eric Moreau avatar
    48 posts
    Member since:
    Sep 2007

    Posted 11 Sep 2008 Link to this post


    Last automn, I have downloaded Telerik.Silverlight.UI.dll (Product version 2007.01.0423.0) and was able to use the RadMediaPlayer from it with great success (in VS2005 since then upgraded to VS2008).

    It is an ASP.Net application having a page that host that control. The only thing I have on that page is:

    <%@ Page Language="vb"
             Title="<%$ Resources:Resources, InterviewTitle %>" %>

    <%@ Register Assembly="Telerik.Silverlight.UI" Namespace="Telerik.Silverlight.UI"
        TagPrefix="cc1" %>

    <asp:Content ID="Content2" ContentPlaceHolderID="objContentPlaceHolderContent" runat="server">

    <asp:ScriptManager runat="server">

        <cc1:RadMediaPlayer ID="RadMediaPlayer1" runat="server" Height="620px" Width="700px" AutoPlay="True">
                <cc1:RadMediaItem MediaUrl="/images/dobson.wmv"
                    Description="John Dobson @ Scully">

    Now (I don't know exactly since when), I have an error when I try to access the page that has the player on it.

    When I am in VS2008 SP1, I first have a "Unknown element: Canvas.RenderTransform." error and if click Continue, I have another error raised by IE saying:
    Silverlight error message
    ErrorCode: 2202
    ErrorType: RuntimeError
    MethodName: __ElementId_MouseLeftButtonDownAnimation

    After that the viewer is displayed but my video is not loaded.

    How can I fix the problem?
  2. Nikolay
    Nikolay avatar
    3997 posts

    Posted 12 Sep 2008 Link to this post

    Hi Eric Moreau,

    You will need to update the controls to the latest version compatible with Silverlight 1. I attached the files to this thread. Please download them and give them a go. The error should disappear.

    Let us know how this goes.

    the Telerik team

    Check out Telerik Trainer, the state of the art learning tool for Telerik products.
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