static void CallbackMethod(IAsyncResult ar)
{
// ar -> delegate which comes from BeginInvoke method
// so we retrieve it
AsyncResult async = (AsyncResult)ar;
AsyncMethodHandler asyncCaller = (AsyncMethodHandler)async.AsyncDelegate;
// these are parameters that we passed to our async method
string formatString = (string)ar.AsyncState;
int threadId = 0;
Console.WriteLine(formatString, threadId, asyncCaller.EndInvoke(out threadId, ar));
}
static void Main(string[] args)
{
int threadId;
AsyncMethodHandler ah = new AsyncMethodHandler(Program.AsyncMethod);
ah.BeginInvoke(9000,
out threadId,
new AsyncCallback(CallbackMethod),
"The call executed on thread {0}, with return value: \n\"{1}\".");
Console.WriteLine($"The main thread {System.Threading.Thread.CurrentThread.ManagedThreadId} continues to execute...");
System.Threading.Thread.Sleep(4000);
Console.WriteLine($"Main thread {System.Threading.Thread.CurrentThread.ManagedThreadId} ends.");
}
protected void CallBackBuildControls(IAsyncResult ar)
{
try
{
// Retrieve the delegate.
AsyncResult result = (AsyncResult)ar;
AsyncMethodHandler caller = (AsyncMethodHandler)result.AsyncDelegate;
// Call EndInvoke to retrieve the results.
_PACTControlData = caller.EndInvoke(ar);
// Still on secondary thread, must update ui on primary thread
UpdateUI(_PACTControlData);
}
catch (Exception ex)
{
string exMessage = null;
exMessage = "Error: " + ex.Message;
//UpdateUI(exMessage);
}
}
public void DodajDelegata(AsyncMethodHandler handler)
{
Event += handler;
}