How to turn an asynchronous method into a synchronous one

[Guest]

I want to write an synchronous method Logon(). The method will need to make
asynchronous calls - sending windows messages to other apps and waiting for
replies etc etc etc. I'm wondering what the best way write it as a
synchronous method is.

I can easily write a loop which goes: Thread.Sleep(awhile) until some state
has been changed by event handlers, but is that the best way?

 

[Sergey Bogdanov]

You have to use ManualResetEvent for such things. Initiate event and
pass it to an asynchronous method. When a method complete job it have to
invoke Set() method. While an asynchronous method completing execution,
a synchronosu method should invoke WaitOne(). Here is pseudo code for you:

AsyncLogon(ManualResetEvent event)
{
try
{
...
}
finally
{
event.Set();
}
}

SyncLogon()
{
ManualResetEvent event = new ManualResetEvent(false);
AsyncLogon(event);
event.WaitOne();
event.Close();
}

HTH