handler.ashx

来自「办公系统办公系统办公系统办公系统办公系统办公系统办公系统办公系统办公系统办公系统」· ASHX 代码 · 共 44 行

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

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

public class Handler : IHttpHandler
{
    private string WATERMARK_URL = "~/Images/Users/WaterMark.png";
    private string DEFAULTIMAGE_URL = "~/Images/Users/noperson.jpg";

    public void ProcessRequest(HttpContext context)
    {
        String ImagePath = context.Server.MapPath( context.Request["URL"]);
        Image Cover = null;
        if (File.Exists(ImagePath))
        {
            Cover = Image.FromFile(ImagePath);
            Image Water = Image.FromFile(context.Server.MapPath(WATERMARK_URL));
            Graphics G = Graphics.FromImage(Cover);
            G.DrawImage(Water, new Rectangle(Cover.Width - Water.Width, Cover.Height - Water.Height, Water.Width, Water.Height), 0, 0, Water.Width, Water.Height, GraphicsUnit.Pixel);
            G.Dispose();
            Water.Dispose();
        }
        else
        {
            Cover = Image.FromFile(context.Server.MapPath(DEFAULTIMAGE_URL));
        }
        context.Response.ContentType = "image/jpeg";
        Cover.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
        Cover.Dispose();
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }

}