使用CancellationPending属性来手动停止BackgroundWorker的执行。

代码示例：

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) { BackgroundWorker worker = sender as BackgroundWorker;

while (!worker.CancellationPending)
{
    // 执行任务的代码

    if (任务完成条件)
    {
        worker.ReportProgress(100);
        break;
    }
}

e.Cancel = true; // 设置CancellationPending为true

}

private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { if (e.Cancelled) { // BackgroundWorker已经被取消 } else if (e.Error != null) { // 出错 } else { // 执行完成 } }

private void button1_Click(object sender, EventArgs e) { if (backgroundWorker1.IsBusy) { backgroundWorker1.CancelAsync(); // 手动停止BackgroundWorker的执行 } }