Hi all. After complete of asynchronous call to WCF service I want set success message into session and show user the notification .

I tried use two ways for complete this operation.

1) Event Based Model.

client.GetDataCompleted += new EventHandler<GetDataCompletedEventArgs>(GetDataCompleted);
client.GetDataAsync(id, client);
private void GetDataCompleted(object obj, GetDataCompletedEventArgs e) 
{
   this.SetNotification(new Notification() { Message = e.Result, Type =    NotificationType.Success });
}

In MyOperationCompleted event i can set notification to HttpContext.Current.Session, but I must waiting before this operation will completed and can't navigate to others pages.

2) IAsyncResult Model.

client.BeginGetData(id, GetDataCallback, client);
 private void GetDataCallback(IAsyncResult ar) {
            string name = ((ServiceReference1.Service1Client)ar.AsyncState).EndGetData(ar);
            this.SetNotification(new Notification() { Message = name, Type = NotificationType.Success });
        }

"Generate asynchronous operations" in service reference enabled.

Please help me with this trouble. I novice in ASP.NET MVC. Thanks.