Asp.Net 使用 GDI+ 绘制3D饼图入门篇源码

    
  topn3dpie.aspx
  ------------------
  <％@ Page language="c#" CodeBehind="topn3dpie.aspx.cs" AutoEventWireup="false" Inherits="Yeefly.topn3dpie" ％>
  
  topn3dpie.aspx.cs
  -----------------
  using System;
  using System.Collections;
  using System.ComponentModel;
  using System.Data;
  using System.Drawing;
  using System.Web;
  using System.Web.SessionState;
  using System.Web.UI;
  using System.Web.UI.WebControls;
  using System.Web.UI.HtmlControls;
  using System.Drawing.Imaging;
  using System.Drawing.Drawing2D;
  using System.IO;
  
  namespace Yeefly
  {
  /// <summary>
  /// Graph 的摘要说明。
  /// </summary>
  public class topn3dpie : System.Web.UI.Page
  {
  private void Page_Load(object sender, System.EventArgs e)
  {
  Response.ContentType = "image/jpeg";
  const int width = 300, height = 300;
  int x = 30, y = 50;
  
  int pieWidth = 120, pieHeight = 40, pieShadow = 15;
  int[] arrVote = {70,90,80,20,60,40};
  Random oRan = new Random();
  
  
  Bitmap objBitmap = new Bitmap(width, height);
  Graphics objGraphics = Graphics.FromImage(objBitmap);
  objGraphics.DrawRectangle(new Pen(Color.Black),0,0,width,height);
  objGraphics.FillRectangle(new SolidBrush(Color.White), 1, 1,width - 2, height - 2);
  SolidBrush objBrush = new SolidBrush(Color.Blue);
  objGraphics.SmoothingMode = SmoothingMode.AntiAlias;
  
  int iCurrentPos = 0;
  
  Color[] arrColor = {Color.Red,Color.Red,Color.Red,Color.Red,Color.Red,Color.Red};
  
  for(int i = arrVote.Length - 1 ; i >= 0; i--)
  {
  arrColor[i] = Color.FromArgb(oRan.Next(255), oRan.Next(255), oRan.Next(255));
  }
  
  for(int i = arrVote.Length - 1 ; i >= 0; i--)
  {
  objBrush.Color = arrColor[i];
  for(int iLoop2 = 0; iLoop2 < pieShadow; iLoop2++)
  objGraphics.FillPie(new HatchBrush(HatchStyle.Percent50,objBrush.Color),x, y + iLoop2, pieWidth, pieHeight, iCurrentPos, arrVote[i]);
  iCurrentPos += arrVote[i];
  }
  
  iCurrentPos = 0;
  for(int i = arrVote.Length - 1 ; i >= 0;i--)
  {
  objBrush.Color = arrColor[i];
  objGraphics.FillPie(objBrush,x, y, pieWidth, pieHeight, iCurrentPos, arrVote[i]);
  iCurrentPos += arrVote[i];
  }
  
  objBitmap.Save(Response.OutputStream, ImageFormat.Jpeg);
  // clean up...
  objGraphics.Dispose();
  objBitmap.Dispose();
  }
  
  #region Web 窗体设计器生成的代码
  override protected void OnInit(EventArgs e)
  {
  //
  // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
  //
  InitializeComponent();
  base.OnInit(e);
  }
  
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {
  this.Load += new System.EventHandler(this.Page_Load);
  }
  #endregion
  }
  }
    做人要厚道，请注明转自chinazhan中国站长(www.ChinaZhan.com)。