using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.IO;
using System.Xml;
using System.Text;
using System.Data.SqlClient;
using System.Data;


namespace Web.UI
{
    public partial class Weixin : System.Web.UI.Page
    {
        const string Token = "token";		//你的token
        protected string strJson = "";
        protected string DefaultOrganise;
        Lib.SqlHelper sqlHelper = new Lib.SqlHelper();
        string Connectionstring = @"Data Source=192.100.60.122;Initial catalog=appdevtestdb;UID=sa;pwd=ZBJT0049admin;";//替换
        protected void Page_Load(object sender, EventArgs e)
        {
            string postStr = "";
           // Valid();                        //验证通过后可删除此行代码
            if (Request.HttpMethod.ToLower() == "post")
            {
                Stream s = System.Web.HttpContext.Current.Request.InputStream;
                byte[] b = new byte[s.Length];
                s.Read(b, 0, (int)s.Length);
                postStr = Encoding.UTF8.GetString(b);
                if (!string.IsNullOrEmpty(postStr))
                {
                    ResponseMsg(postStr);

                }

            }
        }

        /// 

        /// 返回信息结果(微信信息返回)
        /// 
        /// 
        private void ResponseMsg(string weixinXML)
        {
            //回复消息的部分:你的代码写在这里
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(weixinXML);
            XmlNodeList list = doc.GetElementsByTagName("xml");
            XmlNode xn = list[0];
            string FromUserName = xn.SelectSingleNode("//FromUserName").InnerText;
            string ToUserName = xn.SelectSingleNode("//ToUserName").InnerText;
            string content = "";
            content = xn.SelectSingleNode("//Content").InnerText;
            //string content = "";// doc.GetElementsByTagName("content").Item(0).ToString();
    
            if (content.Equals("Hello2BizUser"))
            {
                content = "欢迎关注!";
            }
          
            else 
            {
               
                content = "现在是北京时间：" + string.Format("{0:f}", DateTime.Now);
            }
            string strresponse = "";
            strresponse = strresponse + "<![CDATA[" + FromUserName + "]]>";
            strresponse = strresponse + "<![CDATA[" + ToUserName + "]]>";
            strresponse = strresponse + "" + DateTime.Now.Ticks.ToString() + "";
            strresponse = strresponse + "<![CDATA[text]]>";
            strresponse = strresponse + "<![CDATA[" + content + "]]>";
            strresponse = strresponse + "0";
            strresponse = strresponse + "";
            WriteLog("postStr:" + content);
            Response.Write(strresponse);
        }
        /// 

              /// 

        /// 写日志(用于跟踪)
        /// 
        private void WriteLog(string strMemo)
        {
            if (!Directory.Exists(Server.MapPath(@"logs\")))
            {
                Directory.CreateDirectory(Server.MapPath(@"logs\"));
            }
            string filename = Server.MapPath(@"logs/log.txt");
            StreamWriter sr = null;
            try
            {
                if (!File.Exists(filename))
                {
                    sr = File.CreateText(filename);
                }
                else
                {
                    sr = File.AppendText(filename);
                }
                sr.WriteLine(strMemo);
            }
            catch
            {
            }
            finally
            {
                if (sr != null)
                    sr.Close();
            }
        }

        /// 

        /// 验证微信签名
        /// 
        /// * 将token、timestamp、nonce三个参数进行字典序排序
        /// * 将三个参数字符串拼接成一个字符串进行sha1加密
        /// * 开发者获得加密后的字符串可与signature对比，标识该请求来源于微信。
        /// 
        private bool CheckSignature()
        {
            string signature = Request.QueryString["signature"].ToString();
            string timestamp = Request.QueryString["timestamp"].ToString();
            string nonce = Request.QueryString["nonce"].ToString();
            string[] ArrTmp = { Token, timestamp, nonce };
            Array.Sort(ArrTmp);     //字典排序
            string tmpStr = string.Join("", ArrTmp);
            tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
            tmpStr = tmpStr.ToLower();
            if (tmpStr.Equals(signature))
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        /// 

        /// 验证
        /// 
        private void Valid()
        {
            string echoStr = Request.QueryString["echoStr"].ToString();
            if (CheckSignature())
            {
                if (!string.IsNullOrEmpty(echoStr))
                {
                    Response.Write(echoStr);
                    Response.End();
                }
            }
        }
    }
}