Hi Christian Surieux,
You can sue the "initParams" parameter for the silverlight object to pass parameters to the Silverlight application when it is initialized:
Generally there is no direct integration between the Telerik Ajax and Silverlight controls. We have not found many scenarios for which we can provide support out-of-the-box because these kind of requirements tend to be application specific. One exception is the upload control:
As back-end communication we cannot suggest a particular approach as "best' because again this may very much depend on your application.
Things to keep in mind:
- The .NET RIA Services will provide the best integration with Silverlight, but is still in beta and hosting it is a problem. (Requires full trust)
- The ADO.NET data services 1.5 are still in beta and cannot be used in a production environment. The 1.0 version lacks a lot of things that an application may need. Generally they allow exposing data in a very elegant way.
- The standard WCF services is a good choice in the short term - they are available now and are supported.
Unfortunately I cannot suggest what may be best in your case.
the Telerik team