微信公众号开发--开发服务器接入微信服务器

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

using System;
using System.Web;
using System.IO;
using System.Text;
using System.Web.Security;
public class wxapi : IHttpHandler {

    public void ProcessRequest (HttpContext context) {
        string postString = string.Empty;
        Auth(); //微信接入的测试
    }
    /// <summary>
    /// 成为开发者的第一步，验证并相应服务器的数据
    /// </summary>
    private void Auth()
    {
        string token = "weixin";//从配置文件获取Token
        if (string.IsNullOrEmpty(token))
        {

        }

        string echoString = HttpContext.Current.Request.QueryString["echoStr"];
        string signature = HttpContext.Current.Request.QueryString["signature"];
        string timestamp = HttpContext.Current.Request.QueryString["timestamp"];
        string nonce = HttpContext.Current.Request.QueryString["nonce"];

        if (CheckSignature(token, signature, timestamp, nonce))
        {
            if (!string.IsNullOrEmpty(echoString))
            {
                HttpContext.Current.Response.Write(echoString);
                HttpContext.Current.Response.End();
            }
        }
    }
    /// <summary>
    /// 验证微信签名
    /// </summary>
    public bool CheckSignature(string token, string signature, string timestamp, string nonce)
    {
        string[] ArrTmp = { token, timestamp, nonce };

        Array.Sort(ArrTmp);
        string tmpStr = string.Join("", ArrTmp);

        tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
        tmpStr = tmpStr.ToLower();

        if (tmpStr == signature)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    public bool IsReusable {
        get {
            return false;
        }
    }

}