<%@ WebHandler Language="C#" Class="WeiXin.MessageReceiver" %>
#define TRACE

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Diagnostics;
using System.IO;
using System.Xml;
using WeiXin;
using WeiXin.Models;

namespace WeiXin
{
    public class MessageReceiver : IHttpHandler
    {
        public MessageReceiver()
        {

        }

        public void ProcessRequest(HttpContext context)
        {
            const string TOKEN = "5201314";
            var handler = new WeiXin.HttpHandler(TOKEN, new MessageProcesser());
            handler.Process(context.Request, context.Response);
        }

        public virtual bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using WeiXin.Models;

public class MyMessageProcesser : WeiXin.MessageProcesser
{
    public MyMessageProcesser()
    {
    }

    protected override ReplyMessage ProcessSubscribeEvent(SubscribeEvent msg)
    {
        var reply = new TextReply(msg);
        reply.Content = "你好，欢迎关注";
        return reply;
    }

    protected override ReplyMessage ProcessUnsubscribeEvent(UnsubscribeEvent msg)
    {
        var reply = new TextReply(msg);
        reply.Content = "取消关注";
        return reply;
    }
}