picture2在panel1或2的位置总是不对，但是picture1确实正确的

private void panel1_DragDrop(object sender, DragEventArgs e)
{
PictureBox pictureBox1 = (PictureBox)e.Data.GetData(typeof(PictureBox));
Panel panel1 = (Panel)sender;
panel1.Controls.Add(pictureBox1);
pictureBox1.Location = this.PointToClient(new Point(e.X - panel1.Left, e.Y - panel1.Top));
PictureBox pictureBox2 = (PictureBox)e.Data.GetData(typeof(PictureBox));

        panel1.Controls.Add(pictureBox2);
        pictureBox2.Location = this.PointToClient(new Point(e.X - panel1.Left, e.Y - panel1.Top));

    }
    private void panel2_DragDrop(object sender, DragEventArgs e)
    {
        PictureBox pictureBox1 = (PictureBox)e.Data.GetData(typeof(PictureBox));
        Panel panel2 = (Panel)sender;
        panel2.Controls.Add(pictureBox1);
        pictureBox1.Location = this.PointToClient(new Point(e.X - panel2.Left, e.Y - panel2.Top));
        PictureBox pictureBox2 = (PictureBox)e.Data.GetData(typeof(PictureBox));

        panel1.Controls.Add(pictureBox2);
        pictureBox2.Location = this.PointToClient(new Point(e.X - panel1.Left, e.Y - panel1.Top));

    }

放两个label调试输出下当前的x y看看