如何移动滑块自动滚动（按钮）

Question

如果整个长度恰好是600点，如何将滑块左右部分精确地移动200个点？使用ButtonLeft和ButtonRight按钮...

    private void buttonLeft_Click(object sender, EventArgs e)
    {
        panel1.AutoScrollPosition = new Point(-200, 0);
    }

    private void buttonRight_Click(object sender, EventArgs e)
    {
        panel1.AutoScrollPosition = new Point(+200, 0);
    }

Answer 1

如果有错误，请纠正我，但是代码可以正常工作：SL#1 SL#2

    private void buttonLeft_Click(object sender, EventArgs e)
    {
        panel1.AutoScrollPosition = new Point(-panel1.AutoScrollPosition.X - 200);
    }

    private void buttonRight_Click(object sender, EventArgs e)
    {
        panel1.AutoScrollPosition = new Point(-panel1.AutoScrollPosition.X + 200);
    }

或

    private void buttonLeft_Click(object sender, EventArgs e)
    {
        Point p = panel1.AutoScrollPosition;
        panel1.AutoScrollPosition = new Point(-p.X - 200)
    }

    private void buttonRight_Click(object sender, EventArgs e)
    {
        Point p = panel1.AutoScrollPosition;
        panel1.AutoScrollPosition = new Point(-p.X + 200)
    }