Question about making Asynchronous call in C# (WPF) to COM object
- by Andrew
Hi,
Sorry to ask such a basic question but I seem to have a brain freeze on this one! I'm calling a COM (ATL) object from my WPF project. The COM method might take a long time to complete. I thought I'd try and call it asychronously. I have a few demo lines that show the problem.
private void checkBox1_Checked(object sender, RoutedEventArgs e)
{
//DoSomeWork();
AsyncDoWork caller = new AsyncDoWork(DoSomeWork);
IAsyncResult result = caller.BeginInvoke(null, null);
}
private delegate void AsyncDoWork();
private void DoSomeWork()
{
_Server.DoWork();
}
The ATL method DoWork is very exciting. It is:
STDMETHODIMP CSimpleObject::DoWork(void)
{
Sleep(5000);
return S_OK;
}
I had expectations that running this way would result in the checkbox being checked right away (instead of in 5 seconds) and me being able to move the WPF gui around the screen. I can't - for 5 seconds.
What am I doing wrong? I'm sure it's something pretty simple. Delegate signature wrong?
Thanks.
