我如何才能暂停/继续后台工作人员
本文关键字:继续 后台 工作人员 暂停 | 更新日期: 2024-10-22 05:36:08
我有一个按钮点击事件要继续:
private void button3_Click(object sender, EventArgs e)
{
if (backgroundWorker1.IsBusy)
{
button2.Enabled = true;
button3.Enabled = false;
}
else
{
backgroundWorker1.RunWorkerAsync();
button2.Enabled = true;
button3.Enabled = false;
}
}
以及暂停的按钮点击事件:
private void button2_Click(object sender, EventArgs e)
{
if (backgroundWorker1.WorkerSupportsCancellation == true)
{
backgroundWorker1.CancelAsync();
button3.Enabled = true;
soundPlay = false;
stop_alarm = true;
}
}
问题是按钮3点击事件继续代码有时后台很忙,所以我可以启用false/true按钮,但后台工作人员仍在工作。我想暂停DoWork事件并继续。
这是我的DoWork活动:
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = sender as BackgroundWorker;
while (true)
{
if ((worker.CancellationPending == true))
{
e.Cancel = true;
break;
}
else
{
if (tempCpuValue >= (float?)numericUpDown1.Value || tempGpuValue >= (float?)numericUpDown1.Value)
{
soundPlay = true;
blinking_label();
}
else
{
soundPlay = false;
}
cpuView();
gpuView();
Thread.Sleep(1000);
}
}
}
您可以使用Thread
而不是BackgroundWorker
来执行此操作吗?
使用Thread,在其工作子例程中,您可以将线程置于捕获ThreadInterruptedException
的try/catch块内的无限休眠状态。因此,当它循环处理它正在处理的任何事情时,您可以查看布尔标志的值来知道是否休眠,然后调用Thread.Sleep(Timeout.Infinite)
。当您捕获ThreadInterruptedException
时,您将标志设置为false并继续执行。
要使线程从UI恢复,您需要将"pause"标志设置为false,并在线程上调用workerThread.Interrupt()
(假设您称之为workerThread)。
想法来源于此处
您可能需要等到取消完成后才能启用/禁用按钮。
private AutoResetEvent _resetEvent = new AutoResetEvent(false);
private void button2_Click(object sender, EventArgs e)
{
if (backgroundWorker1.WorkerSupportsCancellation == true)
{
backgroundWorker1.CancelAsync();
//Wait statement goes here.
this.Cursor=Cursors.AppStarting;
_resetEvent.WaitOne(); // will block until _resetEvent.Set() call made
button3.Enabled = true;
soundPlay = false;
stop_alarm = true;
}
}
请看这个问题:
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = sender as BackgroundWorker;
while (true)
{
if ((worker.CancellationPending == true))
{
e.Cancel = true;
break;
}
else
{
if (tempCpuValue >= (float?)numericUpDown1.Value || tempGpuValue >= (float?)numericUpDown1.Value)
{
soundPlay = true;
blinking_label();
}
else
{
soundPlay = false;
}
cpuView();
gpuView();
Thread.Sleep(1000);
}
}
_resetEvent.Set(); // signal that worker is done
}