How to Safely Stop a BackgroundWorker When Closing a Windows Form?

The background work thread when the Windows window is closed elegantly

When using BackgroundWorker in the Windows window, a common problem is to stop the work thread when the window is closed. However, simply calling

in the window closing event processing process may cause abnormal or deadlocked locks. bgWorker.CancelAsync()

Question 1: Objectdisposexception in Invoke calls

If

is directly called in the window closing event processing program, the subsequent Invoke call may throw

abnormalities. This is because the window is being released, and the main thread has exited. bgWorker.CancelAsync() ObjectDisposedException Question 2: The deadlock when BGWorker is completed

Waiting in the process of closing the event processing process

Completing may lead to dead locks, because Invoke calls are still in progress to prevent the work thread from completing.

bgWorker Solution: Coordinate the closure of the window and the background workline to complete

In order to solve these problems, a more stable method is needed:

In the window closing the event processing program, if

is still running, set
1. . bgWorker e.Cancel = true Set a logo
to indicate the user's request to close.
2. closePending In the event processing program, check the
logo. If you have been set, call
3. on the window. bgWorker RunWorkerCompleted closePending Close() This method can prevent abnormalities and dead locks through the completion of the window to close the event and the completion of
.

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