WCF Tips之四：WCF中的异步调用(1)

[OperationContract]
Stream TransferDocument(Document document);

[ServiceContract]
public interface IDocumentsExplorerService
{
[OperationContract]
Stream TransferDocument(Document document);
[OperationContract(AsyncPattern = true)]
IAsyncResult BeginTransferDocument(Document document,
AsyncCallback callback, object asyncState);
Stream EndTransferDocument(IAsyncResult result);
} 

BasicHttpBinding binding = new BasicHttpBinding();
binding.SendTimeout = TimeSpan.FromMinutes(10);
binding.TransferMode = TransferMode.Streamed;
binding.MaxReceivedMessageSize = 9223372036854775807;
EndpointAddress address = new EndpointAddress
("http://localhost:8008/DocumentExplorerService");
ChannelFactory factory = 
new ChannelFactory(binding,address);
m_service = factory.CreateChannel();
……
IAsyncResult result = m_service.BeginTransferDocument(doc,null,null);
result.AsyncWaitHandle.WaitOne();
Stream stream = m_service.EndTransferDocument(result);