，转c# WinForm画图集锦

1 //描绘曲线

//创建曲线中的点

Point point1 = new Point(68, 420);

Point point2 = new Point(71, 410);

Point point3 = new Point(74, 423);

Point point4 = new Point(77, 412);

Point point5 = new Point(80, 400);

Point point6 = new Point(90, 380);

Point point7 = new Point(100, 350);

Point point8 = new Point(120, 320);

Point[] curvePoints = { point1, point2, point3, point4, point5, point6, point7, point8 };

GraphicsPath myPath = new GraphicsPath();

//AddCurve(点阵,起点,终点,弯曲程度)

myPath.AddCurve(curvePoints, 0, 7, 0.8f);

Pen myPen = new Pen(Color.Red, 1);

IMG.DrawPath(myPen, myPath);

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2 c#.net画曲线图(坐标)

using System.Drawing.Imaging;

using System.Drawing.Drawing2D;

//数据/月份

public ArrayList arrData=new ArrayList();

public ArrayList arrMonth=new ArrayList();

//定义幕布高宽

private int iCanvasWidth=400;

private int iCanvasHeight=300;

//x轴的间距

private int iX=30;

//y轴间距

private int iY=15;

public void InitArray()

{

for(int i=0;i<6;i++)

arrMonth.Add(i+1);

arrData.Add(200);

arrData.Add(180);

arrData.Add(285);

arrData.Add(290);

arrData.Add(275);

arrData.Add(350);

}

// //pen 画线

// Pen myPen = new Pen(Color.Black);

// Graphics g = this.CreateGraphics();

// g.DrawEllipse(myPen, 20, 30, 10, 50);

//

// Graphics g1 = this.CreateGraphics();

// SolidBrush myBrush = new SolidBrush(Color.Red);

// g1.FillEllipse(myBrush,20,30,40,40);

// g1.FillRectangle(myBrush,70,70,10,30);

this.InitArray();

Bitmap bitmap= new Bitmap(iCanvasWidth, iCanvasHeight,PixelFormat.Format24bppRgb);

//Graphics g=Graphics.FromImage(bitmap);

Graphics g=this.CreateGraphics();

g.Clear(Color.White);

Font font = new Font("MS UI Gothic",12);

SolidBrush brush = new SolidBrush(Color.Black);

Pen pen = new Pen(Color.Black);

pen.EndCap = LineCap.ArrowAnchor;

pen.DashStyle = DashStyle.Solid;

//坐标轴

g.DrawLine(pen,20,220,420,220);

g.DrawLine(pen,20,220,20,20);

//x轴标格

g.DrawLine(Pens.Black,20+iX*1,220,20+iX*1,220-2);

g.DrawLine(Pens.Black,20+iX*2,220,20+iX*2,220-2);

g.DrawLine(Pens.Black,20+iX*3,220,20+iX*3,220-2);

g.DrawLine(Pens.Black,20+iX*4,220,20+iX*4,220-2);

g.DrawLine(Pens.Black,20+iX*5,220,20+iX*5,220-2);

g.DrawLine(Pens.Black,20+iX*6,220,20+iX*6,220-2);

//y轴标格

g.DrawLine(Pens.Black, 20, 220 - iY*1, 20 + 2, 220 - iY*1);

g.DrawLine(Pens.Black, 20, 220 - iY*2, 20 + 2, 220 - iY*2);

g.DrawLine(Pens.Black, 20, 220 - iY*3, 20 + 2, 220 - iY*3);

g.DrawLine(Pens.Black, 20, 220 - iY*4, 20 + 2, 220 - iY*4);

g.DrawLine(Pens.Black, 20, 220 - iY*5, 20 + 2, 220 - iY*5);

g.DrawLine(Pens.Black, 20, 220 - iY*6, 20 + 2, 220 - iY*6);

//

double dblX1=20;

double dblY1=220;

for(int i=0;i<arrData.Count;i++)

{

double dblData=Convert.ToDouble(arrData[i]);

double dblY2=220-dblData*15/200;

double dblX2=20+iX*Convert.ToInt32(arrMonth[i]);

if(i!=0)

{

if(i<arrData.Count-1)

{

g.DrawLine(Pens.Black,float.Parse(dblX1.ToString()),float.Parse(dblY1.ToString()),float.Parse(dblX2.ToString()),float.Parse(dblY2.ToString()));

}

else

{

g.DrawLine(pen,float.Parse(dblX1.ToString()),float.Parse(dblY1.ToString()),float.Parse(dblX2.ToString()),float.Parse(dblY2.ToString()));

}

}

dblX1=dblX2;

dblY1=dblY2;

}

}

}

}

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C#画折线图一例

在．net中，微软给我们提供了画图类（system.drawing.imaging），在该类中画图的基本功能都有。比如：直线、折线、矩形、多边形、椭圆形、扇形、曲线等等，因此一般的图形都可以直接通过代码画出来。接下来介绍一些画图函数：

Bitmap bmap=new Bitmap(500,500)　/定义图像大小；

bmap.Save(stream,imagecodecinfo) /将图像保存到指定的输出流；

Graphics gph /定义或创建gdi绘图对像；

PointF cpt　/定义二维平面中x,y坐标；

DrawString(string,font,brush,ponitf) /用指定的brush和font对像在指定的矩形或点绘制指定的字符串；

DrawLine(pen,ponit,ponit) /用指定的笔(pen)对像绘制指定两点之间直线；

DrawPolygon(pen,ponit[]) /用指定的笔(pen)对像绘制指定多边形，比如三角形，四边形等等；

FillPolygon(brush,ponit[]) /用指定的刷子(brush)对像填充指定的多边形；

DrawEllipse(pen,x,y,width,height) /用指定的笔绘制一个边框定义的椭圆；

FillEllipse(brush,x,y,width,height) /用指定的刷子填充一个边框定义的椭圆；

DrawRectangle(pen,x,y,width,height) /用指定的笔绘制一个指定坐标点、宽度、高度的矩形；

DrawPie(pen,x,y,width,height,startangle,sweepangle) /用指定的笔绘制一个指定坐标点、宽度、高度以及两条射线组成的扇形；

下面的例子可以画出一个折线图，代码如下：

private void Form1_Load(object sender, EventArgs e)

{

string[] month=new string[12]{"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"};

float[] d=new float[12]{20.5f,60,10.8f,15.6f,30,70.9f,50.3f,30.7f,70,50.4f,30.8f,20};

//画图初始化

Bitmap bmap=new Bitmap(500,500);

Graphics gph=Graphics.FromImage(bmap);

gph.Clear(Color.White);

PointF cpt=new PointF(40,420);//中心点

PointF[] xpt=new PointF[3]{new PointF(cpt.Y+15,cpt.Y),new PointF(cpt.Y,cpt.Y-8),new PointF(cpt.Y,cpt.Y+8)};//x轴三角形

PointF[] ypt=new PointF[3]{new PointF(cpt.X,cpt.X-15),new PointF(cpt.X-8,cpt.X),new PointF(cpt.X+8,cpt.X)};//y轴三角形

gph.DrawString("某工厂某产品月生产量图表", new Font("宋体", 14), Brushes.Black, new PointF(cpt.X+60, cpt.X));//图表标题

//画x轴

gph.DrawLine(Pens.Black, cpt.X,cpt.Y ,cpt.Y,cpt.Y);

gph.DrawPolygon(Pens.Black,xpt);

gph.FillPolygon(new SolidBrush(Color.Black),xpt);

gph.DrawString("月份", new Font("宋体", 12), Brushes.Black, new PointF(cpt.Y+10, cpt.Y+10));

//画y轴

gph.DrawLine(Pens.Black, cpt.X,cpt.Y,cpt.X,cpt.X);

gph.DrawPolygon(Pens.Black,ypt);

gph.FillPolygon(new SolidBrush(Color.Black),ypt);

gph.DrawString("单位(万)", new Font("宋体", 12), Brushes.Black, new PointF(0, 7));

for(int i=1;i<=12;i++)

{

//画y轴刻度

if (i<11)

{

gph.DrawString((i*10).ToString(), new Font("宋体", 11), Brushes.Black, new PointF(cpt.X-30, cpt.Y-i*30-6));

gph.DrawLine(Pens.Black, cpt.X-3,cpt.Y-i*30 ,cpt.X,cpt.Y-i*30);

}

//画x轴项目

gph.DrawString(month[i-1].Substring(0,1), new Font("宋体", 11), Brushes.Black, new PointF(cpt.X+i*30-5, cpt.Y+5));

gph.DrawString(month[i-1].Substring(1,1), new Font("宋体", 11), Brushes.Black, new PointF(cpt.X+i*30-5, cpt.Y+20));

if(month[i-1].Length>2) gph.DrawString(month[i-1].Substring(2,1), new Font("宋体", 11), Brushes.Black, new PointF(cpt.X+i*30-5, cpt.Y+35));

//画点

gph.DrawEllipse(Pens.Black,cpt.X+i*30-1.5f,cpt.Y-d[i-1]*3-1.5f,3,3);

gph.FillEllipse(new SolidBrush(Color.Black),cpt.X+i*30-1.5f,cpt.Y-d[i-1]*3-1.5f,3,3);

//画数值

gph.DrawString(d[i-1].ToString(), new Font("宋体", 11), Brushes.Black, new PointF(cpt.X+i*30,cpt.Y-d[i-1]*3));

//画折线

if(i>1) gph.DrawLine(Pens.Red,cpt.X+(i-1)*30,cpt.Y-d[i-2]*3,cpt.X+i*30,cpt.Y-d[i-1]*3);

}

//保存输出图片

//bmap.Save(Response.OutputStream, ImageFormat.Gif);

PictureBox1.Image = bmap;

}