在Point Collection类中调用plot方法

Question

我尝试使用窗口形式绘制DATA，通过调用委托，我使用按钮触发/启动事件成功绘制了XY图形（参见下面的代码）。

我不明白为什么我的代码适用于绘制XY点，但当我只想绘制Y点时它不起作用。

我的意思是单独绘制Y即X = 0,1,2,3,4，递增1或通常任何固定增量，可以是0.1或0.01，或任何东西。但Y由用户传入。

using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;

namespace PlottingSomeData
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        // Delegate
        private delegate int PlotXYDelegate(double x, double y);

        // parameter Chart, Series of the chart, x,y values of the graph
        private void PlotXYAppend(Chart chart, Series dataSeries, double x, double y) 
        {
            // invoke the delegate by passing in the add points method in point collection object
            chart.Invoke(new PlotXYDelegate(dataSeries.Points.AddXY), new Object[] { x, y });
        } 

        double[] X = { 1, 2, 3, 4, 5, 6 };
        double[] Y = { 1, 2, 3, 4, 5, 6 };

        private void button2_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < X.Length || i < Y.Length; i++)
            {
                PlotXYAppend(this.chart2, this.chart2.Series[0], X[i], Y[i]);
            }
        }

        //UP to this line... the code below doesn't work.
        private delegate int PlotYDelegate(double x, double y);

        private void PlotYAppend(Chart chart, Series dataSeries, double y)
        {
            // I do the same here but it fails... for adding single Y value. 
            // There is error for the invoking line. I don't really know what the problem is.
            chart.Invoke(new PlotYDelegate(dataSeries.Points.AddY), new Object[] { y });
        } 
    }
}

错误：＆＃39; AddY＆＃39;匹配委托＆＃39; PlotSomeData.Form1.PlotYDelegate 很抱歉要让程序运行，您需要添加按钮并从工具箱中获取图表。