Asp.Net 使用 GDI+ 繪製3D餅圖入門篇源碼

asp.net|餅圖 topn3dpie.aspx
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<%@ Page language="c#" CodeBehind="topn3dpie.aspx.cs" AutoEventWireup="false" Inherits="Yeefly.topn3dpie" %>

topn3dpie.aspx.cs
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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 的摘要說明。
/// </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 Form設計器產生的程式碼
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 該調用是 ASP.NET Web Form設計器所必需的。
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// 設計器支援所需的方法 - 不要使用代碼編輯器修改
/// 此方法的內容。
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}