Question

我正在制作一个Windows风格=无的WPF应用程序，我设法在我的窗口中创建和工作退出按钮，但我不知道如何在按下鼠标左键时拖动它。我在.cs文件中创建了鼠标左按钮事件，如下所示：

private void see(object sender, MouseButtonEventArgs e)
{
   this.DragMove();
}

然后我在.xaml文件中添加了边框来拖动窗口，如下所示：

<Grid>
   <Border BorderThickness="2" BorderBrush="Black" Height="120" Width="100" MouseLeftButtonDown="see" />
</Grid>

现在我不明白这里有什么问题？如果有人帮助我，我会非常感激吗？

Answer 1

对此窗口使用类似的模式：

public class DragableWindowNoStyle : Window
{

    public DragableWindowNoStyle()
    {
        WindowStyle = WindowStyle.None;
        Grid grid = new Grid() { };
        _moveBorder = new Border()
        {
            BorderThickness = new Thickness(2),
            BorderBrush = Brushes.Red,
            Background = Brushes.Black,
            Width = 50,
            Height = 20,
            HorizontalAlignment= System.Windows.HorizontalAlignment.Center,
            VerticalAlignment = System.Windows.VerticalAlignment.Top,
        }; 
        grid.Children.Add(_moveBorder); 
        this.Content = grid;

        _moveBorder.PreviewMouseLeftButtonDown += _moveBorder_PreviewMouseLeftButtonDown;  
    }

    Point _startPoint;
    bool _isDragging = false;
    Border _moveBorder;

    private void _moveBorder_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        if (Mouse.Capture(this))
        {
            _isDragging = true;
            _startPoint = PointToScreen(Mouse.GetPosition(this));
        }
    }

    protected override void OnPreviewMouseMove(MouseEventArgs e)
    {
        if (_isDragging)
        {
            Point newPoint = PointToScreen(Mouse.GetPosition(this));
            int diffX = (int)(newPoint.X - _startPoint.X);
            int diffY = (int)(newPoint.Y - _startPoint.Y);
            if (Math.Abs(diffX) > 1 || Math.Abs(diffY) > 1)
            {
                Left += diffX;
                Top += diffY;
                InvalidateVisual();
                _startPoint = newPoint;
            }
        }
    }
    protected override void OnPreviewMouseLeftButtonUp(MouseButtonEventArgs e)
    {
        if (_isDragging)
        {
            _isDragging = false;
            Mouse.Capture(null);
        }
    } 



}

Answer 2

有一个示例如何创建一个自定义窗口，其中包括从头开始调整大小，拖动，最小化，恢复和关闭功能：

如何在WPF中创建自定义窗口： https://blog.magnusmontin.net/2013/03/16/how-to-create-a-custom-window-in-wpf/

您还可以使用WindowChrome类https://msdn.microsoft.com/en-us/library/system.windows.shell.windowchrome(v=vs.110).aspx自定义窗口，同时保留其标准功能。然后您不必自己实现调整大小和拖动功能。

如何在没有默认窗口样式的情况下制作可拖动的WPF窗口？

2 个答案: