[英]C# update GUI continuously from backgroundworker
I have created a GUI (winforms) and added a backgroundworker to run in a separate thread. 我创建了一个GUI(winforms)并添加了一个后台工作程序以在一个单独的线程中运行。 The backgroundworker needs to update 2 labels continuously.
后台工作人员需要不断更新2个标签。 The backgroundworker thread should start with button1 click and run forever.
backgroundworker线程应该以button1单击开始并永远运行。
class EcuData
{
public int RPM { get; set; }
public int MAP { get; set; }
}
private void button1_Click(object sender, EventArgs e)
{
EcuData data = new EcuData
{
RPM = 0,
MAP = 0
};
BackWorker1.RunWorkerAsync(data);
}
private void BackWorker1_DoWork(object sender, DoWorkEventArgs e)
{
EcuData argumentData = e.Argument as EcuData;
int x = 0;
while (x<=10)
{
//
// Code for reading in data from hardware.
//
argumentData.RPM = x; //x is for testing only!
argumentData.MAP = x * 2; //x is for testing only!
e.Result = argumentData;
Thread.Sleep(100);
x++;
}
private void BackWorker1_RunWorkerCompleted_1(object sender, RunWorkerCompletedEventArgs e)
{
EcuData data = e.Result as EcuData;
label1.Text = data.RPM.ToString();
label2.Text = data.MAP.ToString();
}
}
The above code just updated the GUI when backgroundworker is done with his job, and that's not what I'm looking for. 上面的代码只是在后台工作完成他的工作时更新了GUI,而这不是我正在寻找的。
You need to look at BackgroundWorker.ReportProgess . 您需要查看BackgroundWorker.ReportProgess 。
You can use it to periodically pass back an object to a method in the main thread, which can update the labels for you. 您可以使用它定期将对象传回主线程中的方法,该方法可以为您更新标签。
You can use a System.Threading.Timer and update the UI from the Timer's callback method by calling BeginInvoke on the main Form. 您可以使用System.Threading.Timer并通过调用主窗体上的BeginInvoke从Timer的回调方法更新UI。
uiUpdateTimer = new System.Threading.Timer(new TimerCallback(
UpdateUI), null, 200, 200);
private void UpdateUI(object state)
{
this.BeginInvoke(new MethodInvoker(UpdateUI));
}
private void UpdateUI()
{
// modify labels here
}
class EcuData
{
public int RPM { get; set; }
public int MAP { get; set; }
}
private void button1_Click(object sender, EventArgs e)
{
EcuData data = new EcuData
{
RPM = 0,
MAP = 0
};
BackWorker1.RunWorkerAsync(data);
}
private void BackWorker1_DoWork(object sender, DoWorkEventArgs e)
{
EcuData argumentData = e.Argument as EcuData;
int x = 0;
while (x<=10)
{
e.Result = argumentData;
Thread.Sleep(100);
this.Invoke((MethodInvoker)delegate
{
label1.Text = Convert.ToString(argumentData.RPM = x); //send hardware data later instead, x is for testing only!
label2.Text = Convert.ToString(argumentData.MAP = x * 2); //send hardware data later instead, x is for testing only!
});
x++;
}
}
This works, but it is the correct way of doing it? 这有效,但这是正确的做法吗?
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