Silverlight in Application Page

http://karinebosch.wordpress.com/2009/07/24/create-a-sharepoint-application-page-hosting-a-silverlight-3-application/

The <asp:Silverlight> control but  if you want to keep up with the newest technologies, you adapt to the rules.

In that case you can use the <object> tag to create the Silverlight application. The code snippet below contains the entire application page.

<%@ Assembly Name="Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Page Language="C#" MasterPageFile="~/_layouts/application.master" Inherits="Microsoft.SharePoint.WebControls.LayoutsPageBase" %>
<%@ Import Namespace="Microsoft.SharePoint" %>
<asp:Content ID="Main" ContentPlaceHolderID="PlaceHolderMain" runat="server">
    <script type="text/javascript">
        function onSilverlightError(sender, args) {
            var appSource = "";
            if (sender != null && sender != 0) {
                appSource = sender.getHost().Source;
            }
            var errorType = args.ErrorType;
            var iErrorCode = args.ErrorCode;
            if (errorType == "ImageError" || errorType == "MediaError") {
                return;
            }
            var errMsg = "Unhandled Error in Silverlight Application " + appSource + "\n";
            errMsg += "Code: " + iErrorCode + "    \n";
            errMsg += "Category: " + errorType + "       \n";
            errMsg += "Message: " + args.ErrorMessage + "     \n";
            if (errorType == "ParserError") {
                errMsg += "File: " + args.xamlFile + "     \n";
                errMsg += "Line: " + args.lineNumber + "     \n";
                errMsg += "Position: " + args.charPosition + "     \n";
            }
            else if (errorType == "RuntimeError") {
                if (args.lineNumber != 0) {
                    errMsg += "Line: " + args.lineNumber + "     \n";
                    errMsg += "Position: " + args.charPosition + "     \n";
                }
                errMsg += "MethodName: " + args.methodName + "     \n";
            }
            throw new Error(errMsg);
        }
    </script>
    <div id="silverlightControlHost" style="width:300;height:100">
        <object data="data:application/x-silverlight-2," type="application/x-silverlight-2"
            width="100%" height="100%">
            <param name="source" value="HelloSilverlight3.xap" />
            <param name="width" value="300" />
            <param name="height" value="100" />
            <param name="onError" value="onSilverlightError" />
            <param name="background" value="white" />
            <param name="minRuntimeVersion" value="3.0.40624.0" />
            <param name="autoUpgrade" value="true" />
            <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=3.0.40624.0" style="text-decoration: none">
                <img src="http://go.microsoft.com/fwlink/?LinkId=108181" alt="Get Microsoft Silverlight"
                    style="border-style: none" />
            </a>
        </object>
    </div>
</asp:Content>
<asp:Content ID="PageTitle" ContentPlaceHolderID="PlaceHolderPageTitle" runat="server">
    Silverlight 3 Demo Application Page
</asp:Content>
<asp:Content ID="PageTitleInTitleArea" runat="server" ContentPlaceHolderID="PlaceHolderPageTitleInTitleArea">
    Silverlight 3 Demo Application Page
</asp:Content>

InitParameters can be passed by using another <param> element. The value string is comma separated as it has always been:

<param name="initParams" value="key1=value,key2=value2" />

The only disadvantage is that you have to click the Silverlight application before you can start interacting with it.

You can download the demo project here. Have fun with it!