Winforms - 单击/拖动表单中的任意位置以移动它,就像在表单标题中单击一样

public class DraggableForm : Form
{
    private bool _dragging;
    private Point _offset;

    protected override void OnMouseDown(MouseEventArgs e)
    {
        base.OnMouseDown(e);

        if (e.Button == MouseButtons.Left)
        {
            _dragging = true;
            _offset = e.Location;
        }
    }

    protected override void OnMouseMove(MouseEventArgs e)
    {
        base.OnMouseMove(e);

        if (_dragging)
        {
            Location = new Point(Location.X + e.X - _offset.X, Location.Y + e.Y - _offset.Y);
        }
    }

    protected override void OnMouseUp(MouseEventArgs e)
    {
        base.OnMouseUp(e);

        if (e.Button == MouseButtons.Left)
        {
            _dragging = false;
        }
    }
}

static void Main()
{
    Application.EnableVisualStyles();
    Application.SetCompatibleTextRenderingDefault(false);
    Application.Run(new DraggableForm());
}