点击此处下载源码+test代码（99KB，rar）

本来想改改几个bug再整理下发上来的。但是最近工作比较紧张，没有时间。发出来大家看看。多提提意见。帮忙改改。 

using  System;
using  System.Collections;
using  System.Drawing;
using  System.IO;
using  System.Drawing.Imaging;


namespace  qchart
... {
    /**//// 

    /// chart 的摘要说明。
    /// 抽象类，所有chart的父类
    /// 

    public abstract class Chart
    ...{
        
        public int width,height;
        public int count = -1;
        public ArrayList al =  null;
        public Bitmap bitmap = null;

        public Chart()
        ...{
            init(400, 300);
        }

        public Chart(int w,int h)
        ...{
            init(w, h);
        }

        private void init(int w, int h)
        ...{
            width = w;
            height = h;
        }


        public void saveBitmap(string file)
        ...{
            bitmap.Save(file, ImageFormat.Jpeg);
        }

        public void saveBitmap(Stream stream)
        ...{

            bitmap.Save(stream, ImageFormat.Jpeg);
        }

        public abstract void createBitmap();

    }
}

 

 

using  System;
using  System.Drawing;
using  System.Drawing.Imaging;
using  System.Collections;
using  System.IO;

namespace  qchart
... {
    /**//// 

    /// 饼图的抽象类，所有样式的饼图继承此类
    /// 

    public abstract class PieChart : Chart
    ...{
        public int startAngle = 0;

        public PieChart()
        ...{
            init(400, 300);
        }
        public PieChart(int w,int h)
        ...{
            init(w, h);
        }

        private void init(int w, int h)
        ...{
            width = w;
            height = h;
            al = new ArrayList();
        }

    

        public void addPieData(int val,string name)
        ...{
            PieData pd = new PieData(val,name);
            al.Add(pd);
            count++;
        }

        public void addPieData(int[] vals,string[] names)
        ...{
            int l = vals.Length<names.Length?vals.Length:names.Length;
            for(int i=0;i<l;i++)
            ...{
                addPieData(vals[i],names[i]);
            }
            //count += l ;
        }

        public void removePieData(int index)
        ...{
            if(index >= 0 && index <=count)
            ...{
                al.RemoveAt(index);
                count--;
            }
        }



    }
}

using  System;
using  System.Drawing;
using  System.Drawing.Imaging;
using  System.Collections;
using  System.IO;

namespace  qchart
... {
    /**//// 

    /// 
    /// 

    public  class PieChart2D : PieChart
    ...{

        public PieChart2D() : base()
        ...{
           
        }
        public PieChart2D(int w, int h)  : base(w, h)
        ...{

        }


        public override void createBitmap()
        ...{
            //用指定的大小和格式初始化 Bitmap 类的新实例
            bitmap = new Bitmap(width, height);
            //创建绘图对象
            Graphics g = Graphics.FromImage(bitmap);
            //清除整个绘图面并以透明背景色填充
            //g.Clear(Color.Transparent);
            g.Clear(Color.Snow);

            Rectangle r = new Rectangle(0, 0, width, height);

            //int[] angle = {30,60,90,45,135} ;
            int sum = startAngle;

            Pen p = new Pen(Color.YellowGreen);

            for (int i = 0; i <= count; i++)
            ...{
                PieData pd = (PieData)al[i];
                float f = Convert.ToSingle(pd.val);
                g.FillPie(Qcommon.b[i % 12], r, sum, f);
                g.DrawPie(p, r, sum, f);
                sum += Convert.ToInt32(f);
            }

        }




    }
}

using  System;
using  System.Drawing;
using  System.Drawing.Imaging;
using  System.Collections;
using  System.IO;
using  System.Drawing.Drawing2D;

namespace  qchart
... {
    /**//// 

    /// 
    /// 

    public  class PieChart3D : PieChart
    ...{
        static readonly int deta = 30;
        //static readonly int dpt  = 5;

        public PieChart3D() : base()
        ...{
           
        }
        public PieChart3D(int w, int h):base(w,h)
        ...{
            
        }


        public override void createBitmap()
        ...{
            //bool flag = false;

            //用指定的大小和格式初始化 Bitmap 类的新实例
            bitmap = new Bitmap(width , height );
            //创建绘图对象
            Graphics g = Graphics.FromImage(bitmap);
            //清除整个绘图面并以透明背景色填充
            //g.Clear(Color.Transparent);
            g.Clear(Color.Snow);

            Rectangle rs = new Rectangle((width - 400) / 2 - 50, (height - 300) / 2 + deta/2, 400, 300);

            //g.FillPie(Qcommon.b[0], rs, 0, 180);

            Rectangle r  = new Rectangle((width - 400) / 2 - 50 , (height - 300)/2 - deta/2, 400, 300);
            //Rectangle rc = new Rectangle((width - 400) / 2 + 50, (height - 300) / 2, 300, 300);

            int sum = startAngle % 360;

            Pen p = new Pen(Color.YellowGreen);
            Pen ps = new Pen(Color.DarkGray);

            Point pt = new Point();
            double a = r.Width / 2d;
            double b = r.Height / 2d;
            pt.X = r.X + r.Width / 2;
            pt.Y = r.Y + r.Height / 2;

            //画底面和侧边
            for (int i = 0; i <= count; i++)
            ...{
                double af = sum / 180d * Math.PI;
                int sign = Math.Sign(Math.Cos(af));
                double k = Math.Tan(af);

                double dx = sign * Math.Sqrt(1 / (1 / (a * a) + k * k / (b * b)));
                double dy = k * dx;

                int x = pt.X + (int)dx;
                int y = pt.Y + (int)dy;


                PieData pd = (PieData)al[i];
                float f = Convert.ToSingle(pd.val);

                int nextsum = (sum + Convert.ToInt32(f)) % 360;

                g.FillPie(Qcommon.b[i % 12], rs, sum, f);


                if (sum > 180)
                ...{
                    if (nextsum < 180)
                    ...{
                        g.FillPolygon(Qcommon.b[i % 12], new Point[] ...{ new Point(pt.X + (int)a, pt.Y), new Point(pt.X + (int)a, pt.Y + deta), pt });
                        g.DrawLine(p, new Point(pt.X + (int)a, pt.Y), new Point(pt.X + (int)a, pt.Y + deta));

                        //pt = subsidy(g, sum, p, pt, a, b, i + 1, x, y, nextsum);

                        Point pend = findPoint(nextsum, a, b, pt);
                        if (nextsum < 90)
                        ...{
                            printSmailRect(g, i, pend);
                            g.DrawLine(p, new Point(pend.X, pend.Y + deta), new Point(pt.X, pt.Y + deta));
                        }

                    }
                }
                else
                ...{
                    if (nextsum > 180)
                    ...{
                        if (sum <= 90)
                        ...{
                            // 第一象限，补上小正方形就可以了。
                            g.FillRectangle(Qcommon.b[i % 12], x - deta, y, deta, deta);
                        }
                        else
                        ...{

                            /**////// start

                            pt = subsidy(g, sum, p, pt, a, b, i, x, y, nextsum);

                            /**////// end 
                        }

                        // 处理180 度
                        if (sum == 180)
                        ...{
                            if (i == 0)
                            ...{
                                g.FillPolygon(Qcommon.b[(al.Count - 1) % 12], new Point[] ...{ new Point(pt.X - (int)a, pt.Y), new Point(pt.X - (int)a, pt.Y + deta), pt });
                            }
                            else
                            ...{
                                g.FillPolygon(Qcommon.b[(i - 1) % 12], new Point[] ...{ new Point(pt.X - (int)a, pt.Y), new Point(pt.X - (int)a, pt.Y + deta), pt });
                            }

                        }

                        g.DrawLine(p, new Point(pt.X - (int)a, pt.Y), new Point(pt.X - (int)a, pt.Y + deta));

                    }
                    else
                    ...{

                        pt = subsidy(g, sum, p, pt, a, b, i, x, y, nextsum);

                    }

                    // 画底图扇形
                    g.DrawPie(ps, rs, sum, f);
                    // 画start本处竖线
                    g.DrawLine(p, new Point(x, y), new Point(x, y + deta));


                }

                sum = nextsum;

                //this.saveBitmap("e:/qchart/temp/A" + i.ToString() + ".jpg");

            }//for

            int labelWidth = r.Right + deta;
            int labelHeight = deta;

            sum = startAngle % 360;

            // 画顶面
            for (int i = 0; i <= count; i++)
            ...{

                PieData pd = (PieData)al[i];
                float f = Convert.ToSingle(pd.val);

                int nextsum = sum + Convert.ToInt32(f);


                g.FillPie(Qcommon.b[i % 12], r, sum, f);
                g.DrawPie(p, r, sum, f);

                g.FillRectangle(Qcommon.b[i % 12], labelWidth, labelHeight, 10, 10);
                g.DrawString(pd.name, Qcommon.LegendFont, Qcommon.b[i % 12], new PointF(labelWidth + 14, labelHeight));

                labelHeight += 16;

                sum = nextsum;

                /**/////this.saveBitmap("e:/qchart/temp/B" + i.ToString() + ".jpg");

            }//for

           

            //g.DrawArc(p, rs, 0, 180);

        }

        private void printSmailRect(Graphics g, int i, Point pend)
        ...{
            Brush br = null;
            if (i == count)
                br = Qcommon.b[0];
            else
            ...{
                br = Qcommon.b[(i>0?(i - 1):i) % 12];
            }

            g.FillRectangle(Qcommon.b[0], pend.X - deta, pend.Y, deta, deta);

            
        }


        private Point subsidy(Graphics g, int sum, Pen p, Point pt, double a, double b, int i, int x, int y, int nextsum)
        ...{
            Point pend = findPoint(nextsum, a, b, pt);

            // 填充底图扇形
            /**/////g.FillPie(Qcommon.b[i % 12], rs, sum, f);
            // 补偿三角形 ：// 侧面的竖线端点加上前一个位置的上面的顶点

            if (i == 0)
            ...{
                if (sum <= 90)
                ...{
                    // 第一象限，补上小正方形就可以了。
                    g.FillRectangle(Qcommon.b[0], x - deta, y, deta, deta);
                }
                else
                ...{
                    g.FillPolygon(Qcommon.b[0], new Point[] ...{ new Point(x, y), new Point(x, y + deta), new Point(pt.X + (int)a, pt.Y) });
                }
            }
            else
            ...{
                //g.FillPolygon(Qcommon.b[i - 1], new Point[] { new Point(x, y), new Point(pend.X, pend.Y + deta), pend });

                if (sum <= 90)
                ...{
                    // 第一象限，补上小正方形就可以了。
                    g.FillRectangle(Qcommon.b[i % 12], x - deta, y, deta, deta);
                }
                else
                ...{
                    float pref = Convert.ToSingle(((PieData)al[i - 1]).val);
                    int presum = sum - Convert.ToInt32(pref);
                    if (presum < 0) presum += 360;

                    // 侧面的竖线端点加上前一个位置的上面的顶点
                    Point prept = findPoint(presum, a, b, pt);
                    g.FillPolygon(Qcommon.b[i - 1], new Point[] ...{ new Point(x, y), new Point(x, y + deta), prept });
                }

            }

            if (i == count)
            ...{
                printLine(g, p, pend);
            }
            return pt;
        }

        private void printLine(Graphics g, Pen p, Point pend)
        ...{
            g.DrawLine(p,pend,new Point(pend.X,pend.Y + deta));
        }


        private Point findPoint(int presum,double a,double b,Point pt)
        ...{
            double af = presum / 180d * Math.PI;
            int sign = Math.Sign(Math.Cos(af));
            double k = Math.Tan(af);

            double dx = sign * Math.Sqrt(1 / (1 / (a * a) + k * k / (b * b)));
            double dy = k * dx;

            int x = pt.X + (int)dx;

            int y = pt.Y + (int)dy;

            return new Point(x,y);
        }




    }
}

using  System;
using  System.Drawing;
using  System.Drawing.Imaging;

namespace  qchart
... {
    /**//// 

    /// qcommon 的摘要说明。
    /// 

    public class Qcommon
    ...{
        public static Brush[] b = ...{   Brushes.Purple,
                                      Brushes.LightSkyBlue,
                                      Brushes.Pink,
                                      Brushes.SeaGreen,
                                      Brushes.Tomato,
                                      Brushes.RoyalBlue,
                                      Brushes.Orange,
                                      Brushes.DarkGray,
                                      Brushes.PowderBlue,
                                      Brushes.OliveDrab,
                                      Brushes.Navy,
                                      Brushes.Magenta
                                  };


        public static Font LegendFont = new Font("宋体", 8, FontStyle.Regular);


    }
}

using  System;

namespace  qchart
... {
    /**//// 

    /// 饼图的数据格式
    /// 

    public class PieData
    ...{
        public PieData(double val,string name)
        ...{
            this.val = val ;
            this.name = name ;
        }

        public double val;
        public string name = null;
    }
}