下面是C#随机数格点值等值线绘制案例（包含源码），希望对大家有些帮助！源码：using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace MyContour{public partial class frmMain : Form{#region属性public static bool showPoint = false;public static bool drawLines = true;private float[,] _Data;///<summary>///等值线原始格点数据///</summary>public float[,] Data{get { return _Data; }set { _Data = value; }}private float[] _ContourValues;///<summary>///等值线值数组///</summary>public float[] ContourValues{get { return _ContourValues; }set { _ContourValues = value; }}#endregion#region窗体所有操作public frmMain(){InitializeComponent();MakeTestData();setColor();gg = pictureBox1.CreateGraphics();}private void button1_Click(object sender, EventArgs e) {this.timer1.Enabled = false;initValue(); //重新初始化绘制路径的数组MakeTestData();pictureBox1.Refresh();}private void pictureBox1_Paint(object sender, PaintEventArgs e){if (this.Data == null) return;StringFormat sf = new StringFormat();sf.Alignment = StringAlignment.Center;sf.LineAlignment = StringAlignment.Center;Pen pen = new Pen(Color.DarkGray, 1);//绘制等值线if (drawLines){this.plotContour(e.Graphics, pictureBox1.Size);}//绘制网格if (frmMain.showPoint){int ww = pictureBox1.Width / (Data.GetLength(0) - 1); //x轴间隔长度int yy = pictureBox1.Height / (Data.GetLength(1) - 1);//y轴间隔长度//绘制网格横竖线for (int p = 0; p < Data.GetLength(0); p++){e.Graphics.DrawLine(pen, new Point(p * ww, 0), new Point((p) * ww, pictureBox1.Height));}for (int k = 0; k < Data.GetLength(1); k++){e.Graphics.DrawLine(pen, new Point(0, k * yy), new Point(pictureBox1.Width, k * yy));}//绘制网格斜线for (int j = 0; j < Data.GetLength(0) - 1; j++){for (int i = 1; i < Data.GetLength(1); i++){e.Graphics.DrawLine(pen, new Point(j * ww, (i - 1) * yy), new Point((j + 1) * ww, i * yy));e.Graphics.DrawLine(pen, new Point(j * ww, i * yy), new Point((j + 1) * ww, (i - 1) * yy));}}//绘制格点值for (int j = 0; j < Data.GetLength(1); j++){for (int i = 0; i < Data.GetLength(0); i++){e.Graphics.DrawString(Data[i, j].ToString("f0"), DefaultFont, Brushes.Blue, i * pictureBox1.Width / (Data.GetLength(0) - 1), j * pictureBox1.Height / (Data.GetLength(1) - 1), sf);}}}}private void pictureBox1_SizeChanged(object sender, EventArgs e){pictureBox1.Refresh();}private void setColor(){label1.BackColor = getSpectrumColor(0f);label2.BackColor = getSpectrumColor(1f);label3.BackColor = getSpectrumColor(2f);label4.BackColor = getSpectrumColor(3f);label5.BackColor = getSpectrumColor(4f);label6.BackColor = getSpectrumColor(5f);label7.BackColor = getSpectrumColor(6f);label8.BackColor = getSpectrumColor(7f);}private void checkBox1_CheckedChanged(object sender, EventArgs e){frmMain.showPoint = checkBox1.Checked;pictureBox1.Refresh();}//生成路径按钮private void button2_Click(object sender, EventArgs e){drawLines = false;this.pictureBox1.Refresh();nums = 0;if (drawValues[nums].color != null){pens.Color = drawValues[nums].color;gg.DrawLine(pens, drawValues[nums].x1, drawValues[nums].y1, drawValues[nums].x2, drawValues[nums].y2);nums++;}else{this.timer1.Enabled = false;nums = 0;}timer1.Enabled = true;drawLines = true;}Graphics gg = null; //绘制路径的对象Pen pens = new Pen(Color.Black, 1);private void timer1_Tick(object sender, EventArgs e){if (drawValues[nums].color != Color.FromArgb(0, 0, 0)){pens.Color = drawValues[nums].color;gg.DrawLine(pens, drawValues[nums].x1, drawValues[nums].y1, drawValues[nums].x2, drawValues[nums].y2);nums++;}else{this.timer1.Enabled = false;nums = 0;}}#endregion#region绘制等值线操作///<summary>///生成测试数据///</summary>public void MakeTestData(){const int nx = 10, ny = 10, nv = 7;_ContourValues = new float[nv];for (int i = 0; i < nv; i++){_ContourValues[i] = i*10;}_Data = new float[nx,ny]; //nx列,ny行Random ran = new Random();for(int j=0;j<ny;j++){for(int i=0;i<nx;i++){_Data[i, j] = ran.Next(0, 70);//如果格点值等于等值线值,格点值加一个小值for (int k = 0; k < nv; k++){if (_Data[i, j] == ContourValues[k])_Data[i, j] += 0.0001f;}}}}int v1, v2, v3, small, medium, large;int[] ix = new int[4], iy = new int[4];float x1, x2, y1, y2, target;float[] X= new float[5], Y= new float[5], value= new float[5];int iX(float x,int width){return (int)Math.Round(width/(Data.GetLength(0)-1) * x); }int iY(float y,int height){return (int)Math.Round(height/(Data.GetLength(1)-1) * y); }///<summary>///根据等值线值取得相应级别颜色///</summary>///<param name="value"></param>///<returns></returns>public Color getSpectrumColor(float value){Color c = Color.Black;float c0 = 0.0F,c1 = 256.0F,c2 = 256.0F * 2.0F,c3 = 256.0F * 3.0F,c4 = 256.0F * 4.0F,c5 = 256.0F * 5.0F;float Step = c5 * (value) /ContourValues.Length;if (Step > c4 && Step <= c5){float a = Step - c4;c = Color.FromArgb(255, (int)(255.0F - 255.0F * a / c1), 0); }else if (Step > c3 && Step <= c4){float a = Step - c3;c = Color.FromArgb((int)(255.0F * a / c1), 255, 0);}else if (Step > c2 && Step <= c3){float a = Step - c2;c = Color.FromArgb(0, 255, (int)(255.0F - 255.0F * a / c1)); }else if (Step > c1 && Step <= c2){float a = Step - c1;c = Color.FromArgb(0, (int)(255.0F * a / c1), 255);}else if (Step >= c0 && Step <= c1){float a = Step;c = Color.FromArgb((int)(255.0F - 255.0F * a / c1), 0, 255); }else{c = Color.Black;}return c;}///<summary>///插值计算///</summary>///<param name="xa"></param>///<param name="ya"></param>///<param name="xb"></param>///<param name="yb"></param>///<param name="yy"></param>///<returns></returns>float interp(float xa, float ya, float xb, float yb, float yy){if ((yb - ya) != 0.0F){return xa + (yy - ya) * (xb - xa) / (yb - ya);}else{return 0.0F;}}Font font = new Font("Times New Roman", 8.0f);Brush brush = new SolidBrush(Color.Blue);//等值线分析及绘图public void plotContour(Graphics g,Size size){nums = 0;Pen pen = new Pen(Color.Black, 1);for (int j = 0; j < Data.GetLength(1)-1; j++){for (int i = 0; i < Data.GetLength(0)-1; i++){//网格四个角坐标,变量值X[0] = i; Y[0] = j; value[0] = Data[i, j];X[1] = i + 1; Y[1] = j; value[1] = Data[i + 1, j];X[2] = i + 1; Y[2] = j+1; value[2] = Data[i + 1, j+1];X[3] = i ; Y[3] = j+1; value[3] = Data[i, j+1];//网格中心点坐标,变量值X[4] = 0.5F * (X[0] + X[1]); Y[4] = 0.5F * (Y[1] + Y[2]); value[4] = 0.25F * (value[0] + value[1] + value[2] + value[3]);v3 = 4;//巡检单元格范围内所有的点信息for (v1 = 0; v1 < 4; v1++){v2 = v1 + 1;if (v1 == 3) v2 = 0;reorder(v1, v2, v3);//巡检点范围内所有的点信息for (int lines = 0; lines < ContourValues.Length; lines++){target = ContourValues[lines];if (value[small] < target && target < value[large]){x1 = interp(X[small], value[small], X[large], value[large], target);y1 = interp(Y[small], value[small], Y[large], value[large], target);if (target > value[medium]){x2 = interp(X[medium], value[medium], X[large],value[large], target);y2 = interp(Y[medium], value[medium], Y[large],value[large], target);}else{x2 = interp(X[small], value[small], X[medium],value[medium], target);y2 = interp(Y[small], value[small], Y[medium],value[medium], target);}pen.Color = getSpectrumColor(target/10);g.DrawLine(pen, iX(x1,size.Width), iY(y1,size.Height),iX(x2,size.Width), iY(y2,size.Height));//g.DrawString(target.ToString(), font, brush, newPointF((iX(x1, size.Width) + iX(x2, size.Width)) / 2, (iY(y1, size.Height)+iY(y2,size.Height) / 2)));drawValues[nums].color = getSpectrumColor(target / 10);drawValues[nums].x1 = iX(x1, size.Width);drawValues[nums].y1 = iY(y1, size.Height);drawValues[nums].x2 = iX(x2, size.Width);drawValues[nums].y2 = iY(y2, size.Height); nums++;}}}}}}int nums = 0;struct DrawValues{public Color color;public int x1;public int y1;public int x2;public int y2;}DrawValues []drawValues = new DrawValues[90000]; //存储绘制点的信息///<summary>///根据i,j,k三点值，算出大中小三点///</summary>///<param name="i"></param>///<param name="j"></param>///<param name="k"></param>void reorder(int i, int j, int k){int temp;large = i;medium = j;small = k;if (value[small] > value[medium]){temp = medium;medium = small;small = temp;}if (value[medium] > value[large]){temp = large;large = medium;medium = temp;}if (value[small] > value[medium]){temp = medium;medium = small;small = temp;}}//数组重新初始化private void initValue(){drawValues = new DrawValues[90000]; //存储绘制点的信息 }#endregion}}。