关于backgroundWorker的问题

[seabluescn]

我希望点击一个按钮执行一个后台任务，同时希望，该任务未结束前，按钮事件不要重入。

//按钮事件

private void button1_Click(object sender, EventArgs e)
{
this.backgroundWorker.RunWorkerAsync();

while (this.backgroundWorker.IsBusy)
{
System.Diagnostics.Debug.WriteLine("this.backgroundWorker.IsBusy");
System.Threading.Thread.Sleep(1000);
}
}

//后台任务，仅0.1秒执行完毕

private void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
System.Threading.Thread.Sleep(100);
System.Diagnostics.Debug.WriteLine("backgroundWorker_DoWork complete");
}

程序运行后，输出窗口显示：backgroundWorker_DoWork complete

但一直输出：this.backgroundWorker.IsBusy，程序进入死锁状态。

[HDNGO]

http://download.csdn.net/source/835515

[dayizhixiaotutu]

//按钮事件

private void button1_Click(object sender, EventArgs e)
        {
            this.backgroundWorker.RunWorkerAsync();

            while (this.backgroundWorker.IsBusy)
            {
                System.Diagnostics.Debug.WriteLine("this.backgroundWorker.IsBusy");
                System.Threading.Thread.Sleep(1000);
                Application.DoEvents();
            }
        }

//后台任务，仅0.1秒执行完毕

        private void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
        {
            System.Threading.Thread.Sleep(100);
            System.Diagnostics.Debug.WriteLine("backgroundWorker_DoWork complete");
        }