2022年2022年绘图程序代码,用C#实现 .pdf
一个很好的绘图程序代码，用C#实现。using System;using System.IO;/用于文件存取using System.Data;/用于数据访问using System.Drawing;/提供画GDI+图形的基本功能using System.Drawing.Text;/提供画 GDI+图形的高级功能using System.Drawing.Drawing2D;/提供画高级二维，矢量图形功能using System.Drawing.Imaging;/提供画 GDI+图形的高级功能namespace Drawpicture /BarChart 的摘要说明。/public class BarChart private int Pic_Width=410;private int Pic_Height=320;public static bool hasNeg=false;private const string FontWord=Arial;private const int FontSize=9;public int SIDE_WIDTH=400;public int SIDE_HEIGHT=400;private const int CHART_TOP=60;private int CHART_HEIGHT=300;private const int CHART_LEFT=60;private const int CHART_WIDTH=300;public void Render(string word,int data,out string fileName)for(int i=0;idata.Length;i+)if(datai0)Pic_Height*=2;hasNeg=true;SIDE_HEIGHT=(int)(SIDE_HEIGHT*1.5);CHART_HEIGHT=(int)(CHART_HEIGHT*0.3);break;ChartUtil cu=new ChartUtil();PointF zuoBiaoStart;名师资料总结-精品资料欢迎下载-名师精心整理-第 1 页，共 6 页 -PointF zuoBiaoEnd;Graphics g;Page Bitmap bm;createCanvas(out bm,out g,out zuoBiaoEnd,out zuoBiaoStart,cu);/画坐标轴 int chiDu=drawAxes(data,zuoBiaoStart,g,zuoBiaoEnd,cu);/画条形图 float barWidth=CHART_WIDTH/(2*2);PointF barOrigin=new PointF(CHART_LEFT+(barWidth/2),0);float barHeight=2;for(int i=0;i2;i+)barHeight=(float)datai/chiDu)*(CHART_HEIGHT/5);if(barHeight0)barOrigin.Y=CHART_TOP+CHART_HEIGHT;else barOrigin.Y=CHART_TOP+CHART_HEIGHT-barHeight;g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i),barOrigin.X,barOrigin.Y,barWidth,Math.Abs(barHeight);barOrigin.X=barOrigin.X+(barWidth*2);/画右上角的说明图形 drawInstruction(CHART_LEFT,CHART_HEIGHT,CHART_TOP,g,word,data);/输出图形 fileName=cu.PicPath+Guid.NewGuid().ToString()+.gif;bm.Save(fileName,ImageFormat.Gif);/资源回收 bm.Dispose();g.Dispose();private int drawAxes(int data,PointF zuoBiaoStart,Graphics g,PointF zuoBiaoEnd,ChartUtil cu)int chiDu=1;int t=cu.getZuoBiaoValue(data,out chiDu);Page for(int i=0;izuoBiaoStart.Length;i+)名师资料总结-精品资料欢迎下载-名师精心整理-第 2 页，共 6 页 -PointF txtPos=new PointF();txtPos.X=zuoBiaoStarti.X-50;txtPos.Y=zuoBiaoStarti.Y-5;g.DrawString(ti.ToString(),new Font(FontWord,8),Brushes.Black,txtPos);g.DrawLine(Pens.Black,zuoBiaoStarti,zuoBiaoEndi);return chiDu;private void createCanvas(out Bitmap bm,out Graphics g,out PointF zuoBiaoEnd,out PointF zuoBiaoStart,ChartUtil cu)/建立一个Graphics 对象实例 bm=new Bitmap(Pic_Width,Pic_Height);g=Graphics.FromImage(bm);/设置条图图形和文字属性 g.ScaleTransform(Convert.ToSingle(Pic_Width)/SIDE_WIDTH,(Convert.ToSingle(Pic_Height)/SIDE_HEIGHT);g.SmoothingMode=SmoothingMode.Default;g.TextRenderingHint=TextRenderingHint.AntiAlias;/设定画布和边 g.Clear(Color.White);g.DrawRectangle(Pens.Black,0,0,SIDE_WIDTH-1,SIDE_HEIGHT-1);/设置条形图的边 g.DrawRectangle(new Pen(Color.Black,1),CHART_LEFT,CHART_TOP,CHART_WIDTH,CHART_HEIGHT);if(hasNeg)g.DrawRectangle(new Pen(Color.Black,1),CHART_LEFT,CHART_TOP+CHART_HEIGHT,CHART_WIDTH,CHART_HEIGHT);zuoBiaoEnd=null;zuoBiaoStart=cu.getZuoBiaoPoint(new PointF(CHART_TOP,CHART_LEFT),CHART_HEIGHT,CHART_WIDTH,out zuoBiaoEnd,hasNeg);private void drawInstruction(int CHART_LEFT,int CHART_HEIGHT,int CHART_TOP,Graphics g,string word,int data)PointF colsNamePoint=new PointF(CHART_LEFT+55,CHART_HEIGHT+CHART_TOP+2);Page if(hasNeg)名师资料总结-精品资料欢迎下载-名师精心整理-第 3 页，共 6 页 -colsNamePoint=new PointF(CHART_LEFT+55,CHART_HEIGHT*2+CHART_TOP+2);PointF boxOrigin=new PointF(Pic_Width*5/6-30,CHART_TOP*1/3);PointF textOrigin=new PointF(Pic_Width*4/5+8,CHART_TOP*1/3-3);for(int i=0;i2;i+)g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i),boxOrigin.X,boxOrigin.Y,20,10);/g.DrawRectangle(Pens.Black,boxOrigin.X,boxOrigin.Y,20,10);g.DrawString(wordi,new Font(FontWord,FontSize),Brushes.DarkBlue,colsNamePoint);g.DrawString(datai.ToString(),new Font(FontWord,FontSize),Brushes.Black,textOrigin);colsNamePoint.X+=150;boxOrigin.Y+=15;textOrigin.Y+=15;public class ChartUtil public readonly string PicPath=System.AppDomain.CurrentDomain.BaseDirectoryTemp/;public PointF getZuoBiaoPoint(PointF orign,int height,int width,out PointF endPoint,bool hasNeg)int num=6;if(hasNeg)num=11;PointF startPoint=new PointFnum;endPoint=new PointFnum;for(int i=0;inum;i+)PointF pfStart=new PointF();PointF pfEnd=new PointF();pfStart.X=orign.X;pfEnd.X=orign.X+width;pfStart.Y=orign.Y+i*height/5;pfEnd.Y=pfStart.Y;Page startPointi=pfStart;endPointi=pfEnd;return startPoint;名师资料总结-精品资料欢迎下载-名师精心整理-第 4 页，共 6 页 -public int getZuoBiaoValue(int data,out int chidu)int result=new Int3211;int Max=data0;for(int i=0;idata.Length;i+)if(Max datai)Max=datai;string strMax=Max+;chidu=(int)(Convert.ToInt32(strMax.Substring(0,1)+1)*Math.Pow(10,strMax.Length-1)/5;for(int i=0;iresult.Length;i+)resulti=chidu*(5-i);return result;#region get color public static Color GetChartItemColor(int itemIndex)Color selectedColor;switch(itemIndex)case 0:selectedColor=Color.Blue;break;case 1:selectedColor=Color.Red;break;case 2:selectedColor=Color.Yellow;break;case 3:selectedColor=Color.Purple;break;default:selectedColor=Color.Green;break;return selectedColor;Page 名师资料总结-精品资料欢迎下载-名师精心整理-第 5 页，共 6 页 -#endregion 名师资料总结-精品资料欢迎下载-名师精心整理-第 6 页，共 6 页 -
