c# - How to report progress from within a class to a BackgroundWorker? -

My WinForm makes a call that takes some duplicate action, I want to show progress on one form about it.

I want to use the background writer, but I do not know how to report the progress of the form (/ background worker) from the class

Use the method to report progress and subscribe to backgroundworker to update your progress GUI.

Your copy class knows backgroundworker and subscribe to changing progress . It also exposes itself to the progress of the event, which has been raised by the event handler for the event progress of the background worker

Code:

     Public class CopySomethingAsync {Private backgroundworker _BackgroundWorker; Public Event Progressiveenthehandler progression; Public CopySomethingAsync () {//} ... Create background workers, subscribe to DoWork and RunWorkerCompleted _BackgroundWorker. Changed progress + = handles change progress; } Private Wide Handle Progress Changed (Object Sender, Progress Changed Event ARG E) {If (Progress changed! = Null) progress has been changed. Invoke (this, e); }}  

Just subscribe to progress change event CopySomethingAsync and show progress.