c# - 在运行时将用户控件设置为另一个窗口的内容

Question

我有一个带有用户控件的窗口。该用户控件有一个按钮，可将用户控件最大化至全屏。

为了实现此目的，我创建了一个临时窗口，将其缩放到当前屏幕边界并将其内容设置为用户控件。

private void OnBtnMaximizeClick(object sender, RoutedEventArgs e)
    {
      if (this.btnMaximize.IsChecked == true)
      {
        if (tempfullScreenWindow == null)
        {
          tempfullScreenWindow = new Window();
          tempfullScreenWindow.WindowStyle = WindowStyle.None;
          tempfullScreenWindow.ResizeMode = ResizeMode.NoResize;
        }
        var ownerWindow = Window.GetWindow(this);

        Screen screen = this.GetContainingScreen(ownerWindow);

        tempfullScreenWindow.Left = screen.WorkingArea.Left;
        tempfullScreenWindow.Top = screen.WorkingArea.Top;
        tempfullScreenWindow.Width = screen.Bounds.Width;
        tempfullScreenWindow.Height = screen.Bounds.Height;

        // InvalidOperationException comes here (Specified element is already the logical child of another element. Disconnect it first.)
        tempfullScreenWindow.Content = this;  

        tempfullScreenWindow.Owner = ownerWindow;
        tempfullScreenWindow.ShowDialog();
      }
      else
      {
        if (tempfullScreenWindow != null)
        {
          tempfullScreenWindow.Close();
        }
      }
    }

如何将用户控件设置为新创建的窗口的内容，方法是将其与所有者窗口分离，并在临时窗口关闭时将其重新附加到父窗口。

Answer 1

使用

mywindow.Content = new MyuserControl();

确保控件一次只能有一个父控件。首先从第一个窗口分离，然后将其附加到其他窗口。