You can pass any object into the object argument of the runworkerasync call, and then retrieve the arguments from within the dowork event. You can also pass arguments from the dowork event to the runworkercompleted event using the result variable in the doworkeventargs. Use a doworkeventhandler delegate to identify the method that will run when the dowork event occurs. To associate the event with your event handler method, create an instance of this delegate and add it to the dowork event. To stop the event handler method being called when the event occurs, remove the delegate from the dowork event.
Explicit convertion. But depending on the situation you may need to maintain a reference to the previous delegate in order to be able to remove it later. Message box while my main form is doing a lengthy task. As for my case, the lengthy task is transmitting serial protocol.
If your operation produces a result, you can assign the result to the property. This will be available to the runworkercompleted event handler in the property. Public event doworkeventhandler dowork j. Public void add_dowork. Doworkeventhandler value. Public void remove_dowork. Jscript unterstützt die verwendung von ereignissen, aber nicht die deklaration von neuen ereignissen. Dieses ereignis wird beim aufrufen der runworkerasync.
When you create a doworkeventhandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. Handler method is called whenever the event occurs, unless you remove the delegate. Doworkeventhandler doworkeventhandler doworkeventhandler doworkeventhandler examples im folgenden codebeispiel wird veranschaulicht, wie sie mit der doworkeventhandler delegat zum behandeln der dowork ereignis.