当前文件： RenKouPuCha/Code/GraphicShow.aspx.cs[4K，2009-6-12 11:52:57]，打开代码结构图

		            
  1using System;
  2using System.Data;
  3using System.Configuration;
  4using System.Collections;
  5using System.Web;
  6using System.Web.Security;
  7using System.Web.UI;
  8using System.Web.UI.WebControls;
  9using System.Web.UI.WebControls.WebParts;
 10using System.Web.UI.HtmlControls;
 11using System.Drawing;
 12using System.Drawing.Imaging;
 13
 14public partial class Code_GraphicShow : System.Web.UI.Page
 15...{
 16    string[] title;   //列名
 17    int[] rowValue;   //行数据
 18    int total;        //总人数
 19    Brush[] brush;　　//填充刷子
 20    Pen p = new Pen(Color.Yellow, 0);   //画笔
 21    Bitmap objBitmap;    //画布
 22    Graphics objGraphics;
 23    float[] ratio;          //比例
 24    protected void Page_Load(object sender, EventArgs e)
 25    ...{
 26        InitialData();
 27        DrawPie();
 28    }
 29
 30    protected void InitialData()
 31    ...{
 32        //获取行号
 33        string rowStr = Request.QueryString["row"];
 34        int row = Convert.ToInt32(rowStr);
 35
 36        //获取数据表
 37        DataTable dt = (DataTable)Session["GeneralTable"];
 38
 39        //计算表的列数
 40        int colNum = dt.Columns.Count;
 41
 42        //获取除指标和市列以外的列标题
 43        title = new string[colNum - 2];
 44        for (int i = 2; i < colNum; i++)
 45        ...{
 46            title[i - 2] = dt.Columns[i].Caption;
 47        }
 48
 49        //获取除指标和市单元以外的行数据
 50        DataRow dr = dt.Rows[row];
 51        object[] arr = dr.ItemArray;
 52       　rowValue= new int[colNum - 2];
 53        for (int i = 0; i < rowValue.Length; i++)
 54        ...{
 55            rowValue[i] = Convert.ToInt32(arr[i + 2]);
 56        }
 57        total = Convert.ToInt32(arr[1]);
 58        ratio = new float[rowValue.Length];
 59        for (int i = 0; i < ratio.Length; i++)
 60        ...{
 61            ratio[i] = 360f * (float)rowValue[i] / (float)total;
 62        }
 63    }
 64    protected void DrawPie()
 65    ...{
 66        objBitmap = new Bitmap(800, 400);
 67        objGraphics = Graphics.FromImage(objBitmap);
 68        objGraphics.Clear(Color.White);
 69        objGraphics.DrawString("唐山市人口普查情况", new Font("宋体", 16), Brushes.Black, new PointF(5, 10));
 70        PointF symbolLeg = new PointF(335, 20);
 71        PointF descLeg = new PointF(360, 16);
 72        for (int i = 0; i < rowValue.Length; i++)
 73        ...{
 74            objGraphics.FillRectangle(new SolidBrush(GetColor(i)), symbolLeg.X, symbolLeg.Y, 20, 10);
 75            objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20, 10);
 76            objGraphics.DrawString(title[i].ToString(), new Font("宋体", 10), Brushes.Black, descLeg);
 77            symbolLeg.Y += 15;
 78            descLeg.Y += 15;
 79        }
 80        Rectangle rect = new Rectangle(20, 50, 250, 170);
 81        objGraphics.DrawEllipse(p, rect);
 82        brush = new Brush[rowValue.Length];
 83        for (int i = 0; i < brush.Length; i++)
 84        ...{
 85            brush[i] = new SolidBrush(GetColor(i));
 86        }
 87        float startAngle=0.0f;
 88        for (int j = 0; j < rowValue.Length; j++)
 89        ...{
 90            objGraphics.FillPie(brush[j], rect, startAngle, ratio[j]);
 91            startAngle += ratio[j];
 92        }
 93        objBitmap.Save(Response.OutputStream, ImageFormat.Gif);
 94        objBitmap.Dispose();
 95        objGraphics.Dispose();
 96    }
 97    private Color GetColor(int itemIndex)
 98    ...{
 99        Color objColor = Color.Black;
100        if (itemIndex == 0)
101        ...{
102            objColor = Color.Blue;
103        }
104        else if (itemIndex == 1)
105        ...{
106            objColor = Color.Red;
107        }
108        else if (itemIndex == 2)
109        ...{
110            objColor = Color.Yellow;
111        }
112        else if (itemIndex == 3)
113        ...{
114            objColor = Color.Purple;
115        }
116        else if (itemIndex == 4)
117        ...{
118            objColor = Color.Orange;
119        }
120        else if (itemIndex == 5)
121        ...{
122            objColor = Color.Brown;
123        }
124        else if (itemIndex == 6)
125        ...{
126            objColor = Color.Gray;
127        }
128        else if (itemIndex == 7)
129        ...{
130            objColor = Color.Maroon;
131        }
132        else if (itemIndex == 8)
133        ...{
134            objColor = Color.Lime;
135        }
136        else if (itemIndex == 9)
137        ...{
138            objColor = Color.MediumOrchid;
139        }
140        else if (itemIndex == 10)
141        ...{
142            objColor = Color.MidnightBlue;
143        }
144        return objColor;
145          
146    }
147}
148