How to Gracefully Close a Form with an Active BackgroundWorker?

Elegant closure of the window with an event BackgroundWorker

When the window initializes a backgroundworker of the update window UI, closing the window without encountering abnormal or dead locks may become tricky. This problem highlights the challenges faced when trying to stop BackgroundWorker in the Closing incident of the window.

Question:

Using

to cancel the backgroundWorker in HandleClosingEvent may cause

when calling
1. . bgWorker.CancelAsync() Invoke() In HandleClosingEvent, waiting for BackgroundWorker to complete, it will cause dead locks, because ObjectDisposedException will not return.
2. Invoke() Solution:

Avoiding dead locks and abnormal security methods is to cancel the FormClosing event itself. The following steps outline the solution:

Define a logo to track the user's closing request.

In the cover, check whether the BackgroundWorker is busy.

1. If you are busy, set the closePending to true, cancel the backgroundWorker, and set the
to prevent the window from closing.
2. OnFormClosing In the
event processing program of BackgroundWorker, check whether
3. . If it is True, close the window. closePending e.Cancel = true After turning off the operation, reset the
logo to false.
4. RunWorkerCompleted closePending sample code:
5. closePending
Using this method, even if BackgroundWorker is actively updating the UI, the window can also be elegant without abnormal or dead locks.

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