有人懂c#的chart控件吗？我画了两条线，为什么会多出来一条线？ 代码如图。大佬救急谢谢！ 这是源码 namespace WindowsFormsApp1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } void drawline(double x1,double y1, double x2, double y2)//在两点间画线段 { double k; double b; k = (y2 - y1) / (x2 - x1); b = y1 - k * x1; for (double x = Math.Min(x1, x2); x < Math.Max(x1, x2); x += 0.01) { double y = k * x + b; chart1.Series["1"].Points.AddXY(x, y); } } private void button1_Click(object sender, EventArgs e) { chart1.Series.Add("1"); chart1.Series["1"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Spline; drawline(1, 1, 3, 3); drawline(2, 4, 1, 3.5); drawline(3, 3, 2, 4); } } }