C# 动态绘制曲线

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace 绘制曲线{ public partial class Form1 : Form { //随机数 private static int iSeed = 8; Random rd = new Random(iSeed); //存放数据的数组最大值 private int sizeMax; //存放y轴数据的数组链表 private List<int> DataL; //存放在画布上的数据节点的数组 private Point[] pArrData; public Form1() { InitializeComponent(); //根据画布的宽决定x轴需要多少个数组 sizeMax = pcbDisplay.Width / 2; //数据数组 DataL = new List<int>(); pArrData = new Point[sizeMax 1]; } //private void pcbDisplay_Click(object sender, EventArgs e) //{ //} private void Form1_Load(object sender, EventArgs e) { timer1.Start(); } private void timer1_Tick(object sender, EventArgs e) { DataL.Add(rd.Next(20, 180)); //数据链表是否达到x轴最大容量的数组（动态曲线的来源） if (DataL.Count == sizeMax 2) { DataL.RemoveAt(0);//移除链表第一个 } //判断数据链表是否为空 if (DataL.Count != 0) { pArrData = new Point[DataL.Count]; } //生成新的节点 for (int i = 0; i < sizeMax 1; i ) { if (i >= DataL.Count) { break; } pArrData[i] = new Point(i * 2, DataL[i]); } pcbDisplay.Refresh(); } #region 绘制曲线 //定义画笔 private Pen greenPen = new Pen(Color.Green, 1); private Pen redPen = new Pen(Color.Red, 1); private Pen blackPen = new Pen(Color.Black, 1); /// <summary> /// 绘制曲线 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void pcbDisplay_Paint(object sender, PaintEventArgs e) { if (DataL.Count != 1) { e.Graphics.DrawCurve(greenPen, pArrData); } } #endregion }}