如何在WCF和Silverlight应用程序上使用相同的类库

Question

Hi I would like to use the same class library from my Silverlight application and WCF based service. I created a Silverlight C# class library and found the WCF service does not allow adding reference to Silverlight Project types. So

• What should i do to make this work?

• Can Silverlight invoke methods on Silverlight Class library if it communicates with WCF service?

• Is silverlight always this hard?

Answer 1

Portable Class Library

http://msdn.microsoft.com/en-us/library/gg597391.aspx

Answer 2

Try making 2 class libraries, one for Silverlight and one for WCF. Both use the same C# source code files. In the second project, you can add the files as link (In Visual Studio in solution explorer: add existing item, and then in the drop-down Add button, choose "Add as link".

That's how we solved it for shared code. You have to limit yourself to library calls that exist in both worlds though.

Answer 3

Now it is easy :D - just use the .shared trick. It allows you to share the same code between server and client. Look here: http://msdn.microsoft.com/en-us/library/ee707371(v=vs.91).aspx

PS.: You can even add conditional directives on your .shared classes, like this:

#if SILVERLIGHT
        MessageBox.Show("yay, I will run only on silverlight");
#endif