The RadHtmlPlaceHolder SourceUrl property is exposed to allow rendering of external pages. This means that you need to point it to a publicly visible page. Basically when you use this property the RadHtmlPlaceHolder creates an IFrame and sets its src property to the SourceUrl value of the placeholder. Then this IFrame is rendered on top of the Silverlight plug-in on the page where the Sl application is hosted.
Therefore in your case it is better to take advantage of the HtmlSource property that allows you to set it to a string that represents an html content. In this case the RadHtmlPlaceholder will render the content (html code) defined in the HtmlSource property by placing it in a <div> element inside the page that host the SL plug-in.
You can examine both cases in our FirstLook demo
. I hope this information will help you.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items