Asp.Net 使用 GDI+ 绘制3D饼图入门篇源码

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

}

}

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