ASP.Net之瞞天過海

 

using System;
using System.Web;
using System.Drawing;
using System.Drawing.Imaging;
using System.Net;
using System.IO;

namespace Goodspeed.test.httphandle
{

    public class myjpg : IHttpHandler
    {
        public myjpg() { }

        public void ProcessRequest(HttpContext Context)
        {
            HttpResponse Response = Context.Response;
            HttpRequest Request = Context.Request;
            string Url = Request.Url.ToString();
            //Url = "http://www.allinone.net.cn/office/photo/pic/20040714/" + Url.Substring(Url.LastIndexOf("/") + 1);
            Url = "http://img1.qq.com/news/20040721/490452.jpg";

            Response.ContentType = "image/JPEG";

            WebClient wc = new WebClient();
            Stream resStream = wc.OpenRead(Url);
            Image originalimage = Image.FromStream(resStream);//擷取映像

            方法二#region 方法二
            //byte[] myDataBuffer = wc.DownloadData(Url);            
            //Response.BinaryWrite(myDataBuffer);
            #endregion

            浮水印#region 浮水印
            Image newImage = Image.FromFile("c:\watermark1.gif");
            //浮水印
            using (Graphics g = Graphics.FromImage(originalimage))
            {
                Point ulCorner = new Point(originalimage.Width - newImage.Width - 5, originalimage.Height - newImage.Height - 5);//浮水印的位置
                g.DrawImage(newImage, ulCorner);
                g.Dispose();
            }

            #endregion

            originalimage.Save(Response.OutputStream, ImageFormat.Jpeg);
            Response.End();
            originalimage.Dispose();
            wc.Dispose();
        }

        public bool IsReusable
        {
            get { return true; }
        }

    }
}