wpf 控件移动

 

    前端     

        <Canvas x:Name="cav1">

    <Canvas x:Name="cav2" MouseLeftButtonDown="Border_MouseLeftButtonDown" MouseMove="Border_MouseMove" MouseLeftButtonUp="Border_MouseLeftButtonUp"/>

        </Canvas>

    后端       

         private void Border_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)

        {
            isMove = true;
            FrameworkElement currEle = sender as FrameworkElement;
            pos = e.GetPosition(null);
            currEle.CaptureMouse();
        }


        private void Border_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed && isMove)
            {
                FrameworkElement currEle = sender as FrameworkElement;
                double xPos = e.GetPosition(null).X - pos.X + (double)currEle.GetValue(Canvas.LeftProperty);
                double yPos = e.GetPosition(null).Y - pos.Y + (double)currEle.GetValue(Canvas.TopProperty);
                currEle.SetValue(Canvas.LeftProperty, xPos);
                currEle.SetValue(Canvas.TopProperty, yPos);
                pos = e.GetPosition(null);
            }
        }


        private void Border_MouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            isMove = false;
            FrameworkElement currEle = sender as FrameworkElement;
            currEle.ReleaseMouseCapture();
        }