WCF RIA服务中的服务器进度

Question

使用耗时的wcf ria服务时，可以从服务器向客户端发送进度更新吗？

Answer 1

Of course you can. It's not an out of the box solution anyway... All we know that every call that we make from Silverlight is async, so the client continue to respond regardless if there are pending requests.

That said, you can either make use of HttpPollingDuplex and use that sort of callback to notify your client or you can simply poll the server ar regular interval to obtain the current status of the operation.

Be aware that the server variable that holds the state should be ideally stored in ASP.NET Session and eventually accessed in a block cause you are writing it from a thread and reading it from another one

Hope this helps