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Silverlight media player change source and play from javascript

Posted By:      Posted Date: September 10, 2010    Points: 0   Category :ASP.Net
I am having trouble accessing an embedded Silverlight 2 media player in an aspx page from Javascript and was hoping someone might offer some insight on what's going on. What I want to do is fire a javascript event on the client when a button is pressed to change the Silverlight media player media source and then play the newly selected file. I found what seemed like a pretty straightforward example on the silverlight.net site that looked like this:<%@ Page Title="" Language="VB" MasterPageFile="~/master.master" AutoEventWireup="false" CodeFile="Test.aspx.vb" Inherits="Test" %> <%@ Register Assembly="System.Web.Silverlight" Namespace="System.Web.UI.SilverlightControls" TagPrefix="asp" %> <asp:Content ID="Content1" ContentPlaceHolderID="Middle" Runat="Server"> <asp:MediaPlayer ID="Media1" runat="server" Height="240px" Width="320px"> </asp:MediaPlayer> <button id="Button1" onclick="onPlay()" type="button">Play</button> <script type="text/javascript"> function onPlay() { try { var player = $find("ctl00_Middle_Media1"); player.set_mediasource("example.mp3");

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