WCF方法调用开始和结束是否有事件？

Question

I am producing a WPF application using a WCF service to feed it data. Normal boring stuff. I am not using RIA.

I have a global view model, in which I maintain just one reference to the service client object I use for all service calls. I have a little screen blocker to stop users from interacting with the application while it waits for important data. I would like this to be automated across my entire application. So I am looking for events on the service client (or its inner channel) to hook into so I can automatically do this.

So far I've not found them. The closest I've got are the completed events of each method exposed by the web service - but nothing for when the methods are called. I did some WPF/WCF work a few years back and I managed to make this work but I cannot remember how. Does anyone know the secret?

Answer 1

I would create a proxy of the proxy. The new proxy would basically wrap each call: raise a starting event, call actual method, raise an ending event. With a little help of something that could create such proxy for you, this could be easy. Castle.DynamicProxy should do the trick.

Answer 2

You can create a class that implements IClientMessageInspector and register it by using a behavior. See this post for a great answer.