如何在C#的WinForm中制作饼状图和柱状图.docx

1、如何在C#的WinForm中制作饼状图和柱状图如何在C#的WinForm中制作饼状图和柱状图作者：佚名 文章来源：不详 点击数： 105 更新时间：2006-6-21 热 当我们的软件需要各种饼状图和柱状图来表示数据时，我们或许会想到用Offices中的图形控件或是第三方控件，但现在的第三方控件大都需要注册，有些免费的控件会有开发商的标记等。而对于使用Offices的图形控件来说，并不能在程序中得于很好控制，其使用的简易程度也较低，所以在这我给出在C#中使用GDI+实现饼状图和柱状图跟数据库联接显示数据的方法。using System;using System.IO;/用于文件存取using

2、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 BaseLayerpublic class PieChartpublic PieChart()/Render是图形大标题，图开小标题，图形宽度，图形长度，饼图的数据集和饼图的数据集要表示出来的数据public

3、 Image Render(string title, string subTitle, int width, int height, DataSet chartData,int DataLine)const int SIDE_LENGTH = 400;const int PIE_DIAMETER = 200;DataTable dt = chartData.Tables0;/通过输入参数，取得饼图中的总基数float sumData = 0;foreach(DataRow dr in dt.Rows)sumData += Convert.ToSingle(drDataLine);/产生一个i

4、mage对象，并由此产生一个Graphics对象Bitmap bm = new Bitmap(width,height);Graphics g = Graphics.FromImage(bm);/设置对象g的属性g.ScaleTransform(Convert.ToSingle(width)/SIDE_LENGTH,(Convert.ToSingle(height)/SIDE_LENGTH);g.SmoothingMode = SmoothingMode.Default;g.TextRenderingHint = TextRenderingHint.AntiAlias;/画布和边的设定g.Cl

5、ear(Color.White);g.DrawRectangle(Pens.Black,0,0,SIDE_LENGTH-1,SIDE_LENGTH-1);/画饼图标题g.DrawString(title,new Font(Tahoma,14),Brushes.Black,new PointF(5,5);/画饼图的图例g.DrawString(subTitle,new Font(Tahoma,12),Brushes.Black,new PointF(7,35);/画饼图float curAngle = 0;float totalAngle = 0;for(int i=0;idt.Rows.Cou

6、nt;i+)curAngle = Convert.ToSingle(dt.RowsiDataLine) / sumData * 360;g.FillPie(new SolidBrush(ChartUtil.GetChartItemColor(i),100,65,PIE_DIAMETER,PIE_DIAMETER,totalAngle,curAngle);g.DrawPie(Pens.Black,100,65,PIE_DIAMETER,PIE_DIAMETER,totalAngle,curAngle);totalAngle += curAngle;/画图例框及其文字g.DrawRectangle

7、(Pens.Black,200,300,199,99);g.DrawString(图表说明,new Font(Tahoma,12,FontStyle.Bold),Brushes.Black,new PointF(200,300);/画图例各项PointF boxOrigin = new PointF(210,330);PointF textOrigin = new PointF(235,326);float percent = 0;for(int i=0;idt.Rows.Count;i+)g.FillRectangle(new SolidBrush(ChartUtil.GetChartIte

8、mColor(i),boxOrigin.X,boxOrigin.Y,20,10);g.DrawRectangle(Pens.Black,boxOrigin.X,boxOrigin.Y,20,10);percent = Convert.ToSingle(dt.RowsiDataLine) / sumData * 100;g.DrawString(dt.Rowsi1.ToString() + - + dt.Rowsi0.ToString() + ( + percent.ToString(0) + %),new Font(Tahoma,10),Brushes.Black,textOrigin);bo

9、xOrigin.Y += 15;textOrigin.Y += 15;/回收资源g.Dispose();return (Image) bm;/画条形图public class BarChartpublic BarChart()/Render是图形大标题，图开小标题，图形宽度，图形长度，饼图的数据集和饼图的数据集public Image Render(string title, string subTitle, int width, int height, DataSet chartData)const int SIDE_LENGTH = 400;const int CHART_TOP = 75

10、;const int CHART_HEIGHT = 200;const int CHART_LEFT = 50;const int CHART_WIDTH = 300;DataTable dt = chartData.Tables0;/计算最高的点float highPoint = 0;foreach(DataRow dr in dt.Rows)if(highPointConvert.ToSingle(dr0)highPoint = Convert.ToSingle(dr0);/建立一个Graphics对象实例Bitmap bm = new Bitmap(width,height);tryGr

11、aphics g = Graphics.FromImage(bm);/设置条图图形和文字属性g.ScaleTransform(Convert.ToSingle(width)/SIDE_LENGTH,(Convert.ToSingle(height)/SIDE_LENGTH);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_LENGTH-1

12、,SIDE_LENGTH-1);/画大标题g.DrawString(title,new Font(Tahoma,14),Brushes.Black,new PointF(5,5);/画小标题g.DrawString(subTitle,new Font(Tahoma,12),Brushes.Black,new PointF(7,35);/画条形图float barWidth = CHART_WIDTH / (dt.Rows.Count * 2);PointF barOrigin = new PointF(CHART_LEFT + (barWidth / 2),0);float barHeight

13、 = dt.Rows.Count;for(int i=0;idt.Rows.Count;i+)barHeight = Convert.ToSingle(dt.Rowsi0) * 200 / highPoint * 1;barOrigin.Y = CHART_TOP + CHART_HEIGHT - barHeight;g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i),barOrigin.X,barOrigin.Y,barWidth,barHeight);barOrigin.X = barOrigin.X + (barWi

14、dth * 2);/设置边g.DrawLine(new Pen(Color.Black,2),new Point(CHART_LEFT,CHART_TOP),new Point(CHART_LEFT,CHART_TOP + CHART_HEIGHT);g.DrawLine(new Pen(Color.Black,2),new Point(CHART_LEFT,CHART_TOP + CHART_HEIGHT),new Point(CHART_LEFT + CHART_WIDTH,CHART_TOP + CHART_HEIGHT);/画图例框和文字g.DrawRectangle(new Pen(

15、Color.Black,1),200,300,199,99);g.DrawString(图表说明,new Font(Tahoma,12,FontStyle.Bold),Brushes.Black,new PointF(200,300);/画图例PointF boxOrigin = new PointF(210,330);PointF textOrigin = new PointF(235,326);for(int i=0;idt.Rows.Count;i+)g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i),boxOrig

16、in.X,boxOrigin.Y,20,10);g.DrawRectangle(Pens.Black,boxOrigin.X,boxOrigin.Y,20,10);g.DrawString(dt.Rowsi1.ToString() + - + dt.Rowsi0.ToString(),new Font(Tahoma,10),Brushes.Black,textOrigin);boxOrigin.Y += 15;textOrigin.Y += 15;/输出图形g.Dispose();return bm;catchreturn bm;public class ChartUtilpublic Cha

17、rtUtil()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;brea

18、k;return selectedColor;叶子当我们的软件需要各种饼状图和柱状图来表示数据时，我们或许会想到用Offices中的图形控件或是第三方控件，但现在的第三方控件大都需要注册，有些免费的控件会有开发商的标记等。而对于使用Offices的图形控件来说，并不能在程序中得于很好控制，其使用的简易程度也较低，所以在这我给出在C#中使用GDI+实现饼状图和柱状图跟数据库联接显示数据的方法。 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 u

19、sing 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 BaseLayer public class PieChart public PieChart() /Render是图形大标题，图开小标题，图形宽度，图形长度，饼图的数据集和饼图的数据集要表示出来的数据 public Image Render(string title, string subTitle, int

20、width, int height, DataSet chartData,int DataLine) const int SIDE_LENGTH = 400; const int PIE_DIAMETER = 200; DataTable dt = chartData.Tables0; /通过输入参数，取得饼图中的总基数 float sumData = 0; foreach(DataRow dr in dt.Rows) sumData += Convert.ToSingle(drDataLine); /产生一个image对象，并由此产生一个Graphics对象 Bitmap bm = new

21、Bitmap(width,height); Graphics g = Graphics.FromImage(bm); /设置对象g的属性 g.ScaleTransform(Convert.ToSingle(width)/SIDE_LENGTH,(Convert.ToSingle(height)/SIDE_LENGTH); g.SmoothingMode = SmoothingMode.Default; g.TextRenderingHint = TextRenderingHint.AntiAlias; /画布和边的设定 g.Clear(Color.White); g.DrawRectangle

22、(Pens.Black,0,0,SIDE_LENGTH-1,欢迎光临学网,收藏本篇文章 1 2 3 4 5 6$False$ SIDE_LENGTH-1); /画饼图标题 g.DrawString(title,new Font(Tahoma,14),Brushes.Black,new PointF(5,5); /画饼图的图例 g.DrawString(subTitle,new Font(Tahoma,12),Brushes.Black,new PointF(7,35); /画饼图 float curAngle = 0; float totalAngle = 0; for(int i=0;idt

23、.Rows.Count;i+) curAngle = Convert.ToSingle(dt.RowsiDataLine) / sumData * 360; g.FillPie(new SolidBrush(ChartUtil.GetChartItemColor(i),100,65,PIE_DIAMETER,PIE_DIAMETER,totalAngle,curAngle); g.DrawPie(Pens.Black,100,65,PIE_DIAMETER,PIE_DIAMETER,totalAngle,curAngle); totalAngle += curAngle; /画图例框及其文字

24、g.DrawRectangle(Pens.Black,200,300,199,99); g.DrawString(图表说明,new Font(Tahoma,12,FontStyle.Bold),Brushes.Black,new PointF(200,300); /画图例各项 PointF boxOrigin = new PointF(210,330); PointF textOrigin = new PointF(235,326); float percent = 0; for(int i=0;idt.Rows.Count;i+) g.FillRectangle(new SolidBrush

25、(ChartUtil.GetChartItemColor(i),boxOrigin.X,boxOrigin.Y,20,10); g.DrawRectangle(Pens.Black,boxOrigin.X,boxOrigin.Y,20,10); percent = Convert.ToSingle(dt.RowsiDataLine) / sumData * 100; g.DrawString(dt.Rowsi1.ToString() + - + dt.Rowsi0.ToString() + ( + percent.ToString(0) + %),new Font(Tahoma,10),文章整

26、理:学网 (本站) 1 2 3 4 5 6Brushes.Black,textOrigin); boxOrigin.Y += 15; textOrigin.Y += 15; /回收资源 g.Dispose(); return (Image) bm; /画条形图 public class BarChart public BarChart() /Render是图形大标题，图开小标题，图形宽度，图形长度，饼图的数据集和饼图的数据集 public Image Render(string title, string subTitle, int width, int height, DataSet cha

27、rtData) const int SIDE_LENGTH = 400; const int CHART_TOP = 75; const int CHART_HEIGHT = 200; const int CHART_LEFT = 50; const int CHART_WIDTH = 300; DataTable dt = chartData.Tables0; /计算最高的点 float highPoint = 0; foreach(DataRow dr in dt.Rows) if(highPointConvert.ToSingle(dr0) highPoint = Conver

28、t.ToSingle(dr0); /建立一个Graphics对象实例 Bitmap bm = new Bitmap(width,height); try Graphics g = Graphics.FromImage(bm); /设置条图图形和文字属性 g.ScaleTransform(Convert.ToSingle(width)/SIDE_LENGTH,(Convert.ToSingle(height)/SIDE_LENGTH); g.SmoothingMode = Smoothing欢迎光临学网,收藏本篇文章 1 2 3 4 5 6 Mode.Default; g.TextRenderi

29、ngHint = TextRenderingHint.AntiAlias; /设定画布和边 g.Clear(Color.White); g.DrawRectangle(Pens.Black,0,0,SIDE_LENGTH-1,SIDE_LENGTH-1); /画大标题 g.DrawString(title,new Font(Tahoma,14),Brushes.Black,new PointF(5,5); /画小标题 g.DrawString(subTitle,new Font(Tahoma,12),Brushes.Black,new PointF(7,35); /画条形图 float barWidth = CHART_WIDTH / (dt.Rows.Count * 2); PointF barOrigin = new PointF(CHART_LEFT + (barWidth / 2),0); float barHeight = dt.Rows.Count; for(int i=0;idt.Rows.Count;i+) barHeight