如何阻止后臺(tái)工作人員在表單的閉幕式上工作？我有一個(gè)生成背景工作器的表單，它應(yīng)該更新表單自己的文本框(在主線程上)，因此Invoke((Action) (...));打電話。如果在HandleClosingEvent我只是想bgWorker.CancelAsync()然后我得到ObjectDisposedException在……上面Invoke(...)打電話，可以理解。但如果我坐在HandleClosingEvent等待bgWorker的完成，而不是.invoke(.)永遠(yuǎn)不會(huì)回來(lái)，也是可以理解的。任何想法，我如何關(guān)閉這個(gè)應(yīng)用程序而沒有得到異常，或僵局？以下是簡(jiǎn)單Form 1類的三種相關(guān)方法： public Form1() {
InitializeComponent();
Closing += HandleClosingEvent;
this.bgWorker.RunWorkerAsync();
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) {
while (!this.bgWorker.CancellationPending) {
Invoke((Action) (() => { this.textBox1.Text = Environment.TickCount.ToString(); }));
}
}
private void HandleClosingEvent(object sender, CancelEventArgs e) {
this.bgWorker.CancelAsync();
/////// while (this.bgWorker.CancellationPending) {} // deadlock
}
3 回答
梵蒂岡之花
TA貢獻(xiàn)1900條經(jīng)驗(yàn) 獲得超5個(gè)贊
private bool closePending;protected override void OnFormClosing(FormClosingEventArgs e) {
if (backgroundWorker1.IsBusy) {
closePending = true;
backgroundWorker1.CancelAsync();
e.Cancel = true;
this.Enabled = false; // or this.Hide()
return;
}
base.OnFormClosing(e);}void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) {
if (closePending) this.Close();
closePending = false;
// etc...}
犯罪嫌疑人X
TA貢獻(xiàn)2080條經(jīng)驗(yàn) 獲得超4個(gè)贊
List<Thread> bgWorkersThreads = new List<Thread>();
bgWorkesThreads.Add(Thread.CurrentThread);
foreach (Thread thread in this.bgWorkersThreads) {
thread.Abort(); }CustomTaskPaneCOM ExceptionCancelAsync()
backgroundworkersDocumentBeforeClose
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