c#怎么画波形图？

c#怎么画波形图？

简单画波形图代码示例：

public Form1()
{
InitializeComponent();
}
///

/// 数据点结构
///

struct DataPoint
{
public int V;
public DateTime T;
}
private const int n = 20;//点数
private int vMax = 1;//最大值
private const int r = 6;//点半径
private DataPoint[] data = new DataPoint[n];//数据点
private Point[] points = new Point[n];//坐标点
///

/// 添加数据
///

///
///
private void button1_Click(object sender, EventArgs e)
{
for (int i = 0; i < n - 1; i++)
{
data[n - i - 1] = data[n - i - 2];
}
data[0].T = DateTime.Now;
try
{
data[0].V = int.Parse(textBox1.Text);
}
catch
{
data[0].V = 0;
}
if (data[0].V > vMax)
{
vMax = data[0].V;//更新最大值
}
this.Refresh();//刷新，导致窗口重绘
}
//绘图函数
private void Form1_Paint(object sender, PaintEventArgs e)
{
for (int i=0; i < n; i++)
{
DataPoint dataPoint=data[i];
points[i].X=this.Width/n*i;
points[i].Y=this.Height-dataPoint.V*this.Height/vMax;
Rectangle rect = new Rectangle(points[i].X - r, points[i].Y - r, r + r, r + r);
e.Graphics.FillEllipse(new SolidBrush(Color.Green), rect);
e.Graphics.DrawEllipse(new Pen(Color.Red, 1), rect);
e.Graphics.DrawString(dataPoint.T.ToShortTimeString(), this.Font, new SolidBrush(Color.Black), points[i].X, this.Height -100);
}
e.Graphics.DrawLines(new Pen(Color.Red, 1), points);
}

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