problem

Question

hi I have two threads. Thread A is main thread in charge of UI (NotifyIcon and form) while thread B is doign some lenght operations. Now when thread B is done I want thread A to look at the resaults. How can I accoplish that without loop or timer inside thread A? I want something like event raisd in thread A from thread B tnx & sorry for bad english AlienX

S_Kiryazov · Answer

The cleanest way to acomplish this provided by the .net framework is the asynchronous method invocation. To use it you have to do the following. - wrap your lengthy operations in a method to be asynchronously invoked - create a delegate to call the method through say LengthyMethodInvoker - implement a method say DoFinalTasks in the form to perform the tasks to be done when thread B is done - create an AsyncCallback delegate wrapping DoFinalTasks - call LengthyMethodInvoker.BeginInvoke supplying the AsyncCallback delegate as a parameter DoFinalTasks will be called when the lengthy calculations are done. This may be C# specific because the BeginInvoke method is not derived from Delegate but is supplied by the compiler. You can also create events in the two threads and fire them but things can easily get messed up and multithreaded applications are so damn hard to debug. So BeginInvoke is a fine solution