using System;
using System.Web;

public class visitor : IHttpHandler {

public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "image/JPEG";
using (System.Drawing.Bitmap bitImage = new System.Drawing.Bitmap(330, 300))
{
//設置畫布
using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitImage))
{
//IP
g.DrawString("IP:" + context.Request.UserHostAddress, new System.Drawing.Font("宋體", 20), System.Drawing.Brushes.Red, new System.Drawing.PointF(0, 0));
//操作系統
g.DrawString("操作系統:" + context.Request.Browser.Platform, new System.Drawing.Font("宋體", 20), System.Drawing.Brushes.Red, new System.Drawing.PointF(0, 50));
//瀏覽器
g.DrawString("瀏覽器:" + context.Request.Browser.Type, new System.Drawing.Font("宋體", 20), System.Drawing.Brushes.Red, new System.Drawing.PointF(0, 100));
}
//保存到輸出流中
bitImage.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);

}
}

public bool IsReusable {
get {
return false;
}
}

}

using System;
using System.Web;

public class dowload : IHttpHandler {

public void ProcessRequest(HttpContext context)
{
string fileName = HttpUtility.UrlEncode("悲劇.jpg");
context.Response.ContentType = "image/JPEG";

//打開附件對話框 報文頭header和設置它的值
context.Response.AddHeader("Content-Disposition", "attachment:filename=" + fileName);
context.Response.WriteFile("蘋果.jpg");
}

public bool IsReusable {
get {
return false;
}
}

}