Mouse.LeftButton == MouseButtonState.Pressed永不返回true [英] Mouse.LeftButton == MouseButtonState.Pressed never returning true

问题描述

我在C#中有一个Windows窗体应用程序，它监视是否按住了鼠标按钮.GUI有一个主线程，它产生了一个辅助STA线程.此代码永远不会在其中执行:

I have a Windows Forms Application in C# which monitors if the mouse buttons are being held down. There is a primary thread for the GUI, which spawns a secondary STA thread. This code never executes within it:

 if (Mouse.LeftButton == MouseButtonState.Pressed)
 {
    System.Diagnostics.Debug.WriteLine("Left mouse down");
 }

我想知道这是否是因为我为线程启用了以下STA选项吗?

I wondered if this is because I have the following STA option enabled for the thread?

 repeaterThread.SetApartmentState(ApartmentState.STA);
 repeaterThread.Start();

完整的相关代码:我正在使用 PresentationCore.dll 和 System.Windows.Input ；Winforms GUI:

Full relevant code: I'm using PresentationCore.dll, and System.Windows.Input; Winforms GUI:

按下启动按钮时:

 ...
 Thread repeaterThread = new Thread(() => ListenerThread());
 repeaterThread.SetApartmentState(ApartmentState.STA);
 repeaterThread.Start();
 ...

ListenerThread方法:

ListenerThread method:

public static void ListenerThread()
{
   while(true)
   {
      if (Mouse.LeftButton == MouseButtonState.Pressed)
      {
         System.Diagnostics.Debug.WriteLine("Left mouse down");
      }
      Thread.sleep(1000);
   }
}

如何从该线程中按住鼠标按钮?

How can I capture if the mouse button is being held down from this thread?

谢谢

推荐答案

问题是您要混合使用两种GUI技术:WinForms和WPF.您已经设置了适用于WinForms的环境，但是尝试使用WPF中的方法.

The problem is you're trying to mix two GUI technologies: WinForms and WPF. You've set environment suitable for WinForms but trying to use methods from WPF.

您不需要 PresentationCore.dll 和 System.Windows.Input .可以使用 System.Windows.Forms.Control 类实现所需的结果:

You dont need PresentationCore.dll and System.Windows.Input. The desired result can be achieved using System.Windows.Forms.Control class:

public static void ListenerThread()
{
    while (true)
    {
        if ((Control.MouseButtons & MouseButtons.Left) == MouseButtons.Left)
        {
            System.Diagnostics.Debug.WriteLine("Left mouse down");
        }
        Thread.Sleep(1000);
    }
}

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