<%@ WebHandler Language="C#" Class="Handler" %>

using System;
using System.Web;
using System.Drawing;

public class Handler : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        Bitmap img = new Bitmap(600, 400);
        Graphics g = Graphics.FromImage(img);
        Pen p = new Pen(Color.Blue, 2);//定义了一个蓝色,宽度为的画笔 
        g.DrawLine(p, 10, 10, 100, 100);//在画板上画直线,起始坐标为(10,10),终点坐标为(100,100) 
        context.Response.ContentType = "Image/GIF";
        context.Response.Clear();
        context.Response.BufferOutput = true;
        img.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Gif);
        img.Dispose();
        g.Dispose();
        p.Dispose();
       
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }

}