在单独的线程中启动WPF窗口
本文关键字:启动 WPF 窗口 线程 单独 | 更新日期: 2023-09-27 18:00:22
我使用的以下代码在单独的线程中打开一个窗口
public partial class App : Application
{
protected override void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
}
private void button1_Click(object sender, RoutedEventArgs e)
{
Thread newWindowThread = new Thread(new ThreadStart(() =>
{
// Create and show the Window
Config tempWindow = new Config();
tempWindow.Show();
// Start the Dispatcher Processing
System.Windows.Threading.Dispatcher.Run();
}));
// Set the apartment state
newWindowThread.SetApartmentState(ApartmentState.STA);
// Make the thread a background thread
newWindowThread.IsBackground = true;
// Start the thread
}
}
如果我在一个方法中使用这段代码,它就会起作用。但当我按如下方式使用它时,我会得到一个错误:
public partial class App : Application
{
#region Instance Variables
private Thread newWindowThread;
#endregion
protected override void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
newWindowThread = new Thread(new ThreadStart(() =>
{
// Create and show the Window
Config tempWindow = new Config();
tempWindow.Show();
// Start the Dispatcher Processing
System.Windows.Threading.Dispatcher.Run();
}));
}
private void button1_Click(object sender, RoutedEventArgs e)
{
// Set the apartment state
newWindowThread.SetApartmentState(ApartmentState.STA);
// Make the thread a background thread
newWindowThread.IsBackground = true;
// Start the thread
}
}
它抛出以下错误:
System.Threading.ThreadStateException
The state of the thread was not valid to execute the operation
这是什么原因造成的?
@d.moncada,@JPVenson,@TomTom对不起所有人,尤其是@d.moncada,你的回答让我意识到了我的真正错误,如果运行一次直到我的代码工作为止。但我真正的问题是,我试图在两个位置按下按钮1_Click,实际上我使用了一个计时器,该计时器调用了行的方法
private void button1_Click(object sender, RoutedEventArgs e)
现在我的问题的解决方案是检测线程是否已经在C#.net中运行?
我认为问题是在Thread
开始运行之后设置ApartmentState
。
尝试:
public partial class App : Application
{
#region Instance Variables
private Thread newWindowThread;
#endregion
protected override void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
newWindowThread = new Thread(new Thread(() =>
{
// Create and show the Window
Config tempWindow = new Config();
tempWindow.Show();
// Start the Dispatcher Processing
System.Windows.Threading.Dispatcher.Run();
}));
// Set the apartment state
newWindowThread.SetApartmentState(ApartmentState.STA);
// Make the thread a background thread
newWindowThread.IsBackground = true;
}
private void button1_Click(object sender, RoutedEventArgs e)
{
// Start the thread
newWindowThread.Start();
}
}
为什么要这么做?(几乎)没有理由在应用程序中运行第2个UI线程。。。如果您想要一个非模态的新窗口,请实例化您的窗口并调用show
。
为什么差一点?因为这是一个非常复杂的主题,除非你有巨大的预算来开发这种行为,否则你可以没有它