asynchronous method ?

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HI, I have a question about an asynchronous method. How to get the result value in class A after the value changed in class B.

My code :

C#

public class A
{

}


public classe B
{
   String result;
   private void OnDataAvailable(object sender, DataAvailableEventArgs e)
        {
            ...
            result = e.Data;
        }


}

Think you !
}

Posted 10-Jun-11 8:05am

canard29

Updated 10-Jun-11 8:06am

v2

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Sergey Alexandrovich Kryukov 10-Jun-11 14:41pm

What you want is not asynchronous. Griff provided a good solutiom. Also, always prefer threads to asynchronous methods (when you learn what is asynchronous, perhaps).
--SA

2 solutions

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#realJSOP · Answer 1 · 2011-06-10T08:33:00

Solution 1

If you're using .Net 3.5 or newer, you could make Class B an Observable object (derive from IObservable), and then make Class A handle Class B's NotifyPropertyChanged event.

If you're using .Net 3.0 or older, you could have Class A handle Class B's OnDataAvailable event (or a custom event that reflects it AFTER Class B's data has been set).

Posted 10-Jun-11 8:33am

#realJSOP

Updated 10-Jun-11 9:17am

v3

Comments

Sergey Alexandrovich Kryukov 10-Jun-11 14:42pm

5. See also my comment to the question above.
--SA

yesotaso 10-Jun-11 14:57pm

Sorry for intrusion but isn't IObservable<t> Interface unavailable at .Net 3.5?

#realJSOP 10-Jun-11 15:16pm

It is available - you can do WPF with 3.5, so you can use IObservable...

yesotaso 10-Jun-11 15:52pm

Thank you for the info and apologies for uninformed deviation from the subject.

Abhinav S · Answer 2 · 2011-06-10T09:04:00

Solution 4

This article[^] discusses various asynchronous return patters and should be very useful to you.

Posted 10-Jun-11 9:04am

Abhinav S