[英]Threading: Setting checkbox's visibility
In a C#.NET windows application (winforms) I set the visibility of the checkbox to false: 在C#.NET Windows应用程序(winforms)中,我将复选框的可见性设置为false:
checkBoxLaunch.Visible = true;
I started a thread. 我开始了一个话题。
Thread th = new Thread(new ThreadStart(PerformAction));
th.IsBackground = true;
th.Start();
The thread performs some stuff and sets the visibility to true: 该线程执行一些操作并将可见性设置为true:
private void PerformAction()
{
/*
.
.// some actions.
*/
checkBoxLaunch.Visible = true;
}
After the thread finishes its task, the checkbox is not visible to me. 线程完成其任务后,该复选框对我不可见。
What am I missing? 我想念什么?
You shouldn't make UI changes within a non-UI thread. 您不应该在非UI线程内进行UI更改。 Use Control.Invoke
, Control.BeginInvoke
or BackgroundWorker
to marshal the call back to the UI thread. 使用Control.Invoke
, Control.BeginInvoke
或BackgroundWorker
将呼叫Control.BeginInvoke
送回UI线程。 For example (assuming C# 3): 例如(假设C#3):
private void PerformAction()
{
/*
.
.// some actions.
*/
MethodInvoker action = () => checkBoxLaunch.Visible = true;
checkBoxLaunch.BeginInvoke(action);
}
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