WCF Async method: wait until the operation is complete - wcf

Question

I want to wait until an asynchronous WCF Service operation is complete. How to do that ?
Service.WebService.GetUserCompleted += new EventHandler<BGWebService.GetUserCompletedEventArgs>(WebService_GetUserCompleted);
Service.WebService.GetUserAsync(UserId);

Answer 1

The generated method GetUserAsync should return an IAsyncResult (see MSDN documentation). You can use that to block until the operation completes:
IAsyncResult asyncResult = Service.WebService.GetUserAsync(UserId);
asyncResult.AsyncWaitHandle.WaitOne();

Answer 2

Well I tried doing this in a different way. Rather than waiting for the service response I had it send a call to the interface I was working on.
public class Person : INotifyPropertyChanged
{
//Calling the service to get the object needed
private string personname
public string PersonName
{
get {
return personname;
}
set {
personname = value;
NotifyPropertyChanged("PersonName");
}
}
private void NotifyPropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}
public event PropertyChangedEventHandler PropertyChanged;
public void LoadMembersName()
{
ServiceSoapClient serviceClient = new ServiceSoapClient() {};
serviceClient.GetMembersNameCompleted += (sender, e)=>{
PersonName = e.Result
} ;
}
}
Now on the interface we just need to load the person's name and perform the operations after the property change event triggers.
void Page_Load (object sender, EventArgs e)
{
Person per = new Person();
per.PropertyChanged += (sender,e) =>
{
//Your code here
Response.Write(per.PersonName);
};
per.LoadMembersName();
}
I am really sorry. I too had copied the code from some source, but I have misplaced the link.