ZedGraph C#条形图 - 如何检查鼠标单击了哪个栏？

using ZedGraph;

private List<BarItem> bars;

private void Form1_Load(object sender, EventArgs e)
{
    // 创建ZedGraph控件并添加到窗体中
    ZedGraphControl zedGraphControl1 = new ZedGraphControl();
    this.Controls.Add(zedGraphControl1);

    // 创建BarItem列表并添加栏的信息
    bars = new List<BarItem>();
    bars.Add(new BarItem(1, 10));
    bars.Add(new BarItem(2, 20));
    bars.Add(new BarItem(3, 15));

    // 绘制条形图
    GraphPane pane = zedGraphControl1.GraphPane;
    BarItem.CreateBarItems(pane, bars, Color.Blue);

    // 注册MouseDown事件
    zedGraphControl1.MouseDownEvent += new ZedGraphControl.MouseEventHandler(zedGraphControl1_MouseDown);
}

private void zedGraphControl1_MouseDown(object sender, MouseEventArgs e)
{
    // 将鼠标点击的屏幕坐标转换为图表坐标
    GraphPane pane = zedGraphControl1.GraphPane;
    double x, y;
    pane.ReverseTransform(e.Location, out x, out y);

    // 遍历BarItem列表，判断鼠标点击的坐标是否在栏的范围内
    foreach (BarItem bar in bars)
    {
        if (bar.Rect.Contains((float)x, (float)y))
        {
            // 执行相应的操作，例如弹出提示框显示该栏的详细信息
            MessageBox.Show("点击了栏：" + bar.Value);
            break;
        }
    }
}