Handeling Silverlight Async Calls

As it is the case in most of silver light Service Calls You must call them asynchronously

So if you normally have a method in your model class that returns a value from a method on a service

you need to wait until the Call back is complete

ok how we gonna do that lets check :

suppose the model is like this

Notice the GetAllUsers Method Takes an even handler as an argument

Lets look at what should be a viewmodel call to this method “Refer To MVVM Pattern for more”

So what is going to happen when I call the GetAllUsers from the ViewModel

Answer is simple the model register the eventhandler sent from the ViewModel to the Async Call Event and calls the MethodAsync and the callback will be handled in the ViewModel AKA the Class who called the Model //Normally you would have users as a I

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Mohammed Ezzat Awad

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