[英]C# Backgroundworker w/ multiple parameters not cancelling
我正在使用具有多个参数的backgroundworker。 工人正在使用我的参数。 但是我的问题是,我无法阻止后台工作人员。
....
BackgroundWorker workerGetAdvData;
workerGetAdvData = new BackgroundWorker();
workerGetAdvData.DoWork += new DoWorkEventHandler(getAdvData.request_DoWork);
workerGetAdvData.RunWorkerAsync(clsComSettingMain);
........
class ClsGetAdvData
{
//open Serial Port with settings from clsComSettings class
byte[] adv_request = { 0xF0, 0x02, 0x0D }; //Command for requesting advanced sensor data from PFC
public void request_DoWork(object sender, DoWorkEventArgs e)
{
ClsComSettingMain clsComSettingMain = (ClsComSettingMain)e.Argument;
string comPort = clsComSettingMain.comport;
int baudRate = clsComSettingMain.baudRate;
if (comPort != null && baudRate != 0)
{
SerialPort serialPort = new SerialPort(comPort, baudRate);
serialPort.Open();
while (true)
{
if (e.Cancel)
{
e.Cancel = true;
break;
}
else
{
serialPort.Write(adv_request, 0, 3); // Write byte array to serial port, with no offset, all 3 bytes
Thread.Sleep(500);
}
}
}
}
}
我正在尝试使用以下代码取消后台工作者:
private void MenuItem_Click_Serial_Stop(object sender, RoutedEventArgs e)
{
if (workerGetAdvData.IsBusy) //check if worker is running
{
workerGetAdvData.CancelAsync();
}
}
}
但是工人并没有停止。 因为我在工作程序中使用了参数,它不起作用吗?
亲切的问候
最好的祝福
在DoWork代码中,您应该像这样检查BackgroundWorker.CancellationPending属性
public void request_DoWork(object sender, DoWorkEventArgs e)
{
var worker = (BackgroundWorker)sender;
ClsComSettingMain clsComSettingMain = (ClsComSettingMain)e.Argument;
string comPort = clsComSettingMain.comport;
int baudRate = clsComSettingMain.baudRate;
if (comPort != null && baudRate != 0)
{
SerialPort serialPort = new SerialPort(comPort, baudRate);
serialPort.Open();
while (true)
{
if (worker.CancellationPending)
{
e.Cancel = true;
break;
}
else
{
serialPort.Write(adv_request, 0, 3); // Write byte array to serial port, with no offset, all 3 bytes
Thread.Sleep(500);
}
}
}
}
您只需阅读CancelAsync
方法文档 ,就可以轻松地自己回答这个问题。
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