当窗口恢复时，C＃中是否引发了一个事件？ [英] Is there an event raised in C# when a window is restored?

问题描述

我注意到有一个事件是在一个窗口是激活，但是我找不到要恢复的窗口的相应事件，例如从最大化或最小化状态。

解决方案

如果您不喜欢使用窗体的 WindowState 属性，并且不希望保留指示窗体以前状态的标志，则可以在

您需要覆盖窗体的窗口过程（ WndProc ）并收听 WM_SYSCOMMAND 消息指示 SC_RESTORE 。例如：

  protected override void WndProc（ref Message m）
 {
 const int WM_SYSCOMMAND = 0x0112 ; 
 const int SC_RESTORE = 0xF120; 
 
 if（m.Msg == WM_SYSCOMMAND&&（int）m.WParam == SC_RESTORE）
 {
 //做任何你需要的处理，或者提高一个事件
 // ... 
 MessageBox.Show（Window was restored）; 
} 
 
 base.WndProc（ref m）; 
} 
  

Is there any event that is raised when a window is restored in C#/.NET?

I noticed that there is an event that is raised when a window is activated, but I can't find a corresponding event for a window being restored, such as from a maximized or minimized state.

解决方案

If you don't like using the form's WindowState property and don't want to have to keep around a flag indicating the form's previous state, you can achieve the same result at a slightly lower level.

You'll need to override your form's window procedure (WndProc) and listen for a WM_SYSCOMMAND message indicating SC_RESTORE. For example:

protected override void WndProc(ref Message m)
{
    const int WM_SYSCOMMAND = 0x0112;
    const int SC_RESTORE = 0xF120;

    if (m.Msg == WM_SYSCOMMAND && (int)m.WParam == SC_RESTORE)
    {
        // Do whatever processing you need here, or raise an event
        // ...
        MessageBox.Show("Window was restored");
    }

    base.WndProc(ref m);
}

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