创建一个方法，当我单击图片框时，它允许您拖动鼠标可以在表单周围拖动的克隆图像

Question

    private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
    {
        Graphics gs = this.CreateGraphics();
        Bitmap bimage = new Bitmap(pictureBox1.Image);
        Rectangle rect = new Rectangle(e.X, e.Y, 200, 200);
        TextureBrush tb = new TextureBrush(bimage);
        gs.FillRectangle(tb, rect);

当我尝试拖动图像时，我没有让图像移动，这与我认为的鼠标按下方法有关我本质上想要：以便能够向下点击拖动带有图像的矩形 我已创建然后当左按钮松开以使图像消失时

Answer 1

下面是一个例子。它使用包含带有Image的PictureBox的Form。

    Form form2 = new Form();
    Point mdown = Point.Empty;
    private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
    {
        mdown = e.Location;
        form2.BackgroundImage = pictureBox1.Image;
        form2.Opacity = 0.5f;
        form2.MaximizeBox = false;
        form2.ControlBox = false;
        form2.Text = "";
        form2.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
        form2.Size = pictureBox1.Image.Size;
        form2.Show();
        Point pt = pictureBox1.PointToScreen(pictureBox1.Location);
        form2.Location = pt;
    }
    private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            form2.Location = pictureBox1.PointToScreen(
                       new Point(e.X -mdown.X, e.Y - mdown.Y ));
        }
    }
    private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
    {
        form2.Hide();
    }