asp.net uses GDI + to draw the 3D Pie chart introductory article source code

Asp.net| Pie chart 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>
A summary description of Graph.
</summary>
public class Topn3dpie:System.Web.UI.Page
{
private void Page_Load (object sender, System.EventArgs e)
{
Response.ContentType = "Image/jpeg";
const int width = $, height = 300;
int x =, y = 50;

int piewidth = Pieheight =, 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 ();
}

Code generated #region the Web forms Designer
Override protected void OnInit (EventArgs e)
{
//
CodeGen: This call is required for the ASP.net Web forms Designer.
//
InitializeComponent ();
Base. OnInit (e);
}

<summary>
Designer supports required methods-do not use the Code editor to modify
The contents of this method.
</summary>
private void InitializeComponent ()
{
This. Load + = new System.EventHandler (this. Page_Load);
}
#endregion
}
}