wx.config({
 debug: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，
 //若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
 appId: '', // 必填，公众号的唯一标识
 timestamp: , // 必填，生成签名的时间戳
 nonceStr: '', // 必填，生成签名的随机串
 signature: '',// 必填，签名，见附录1
 jsApiList: [] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
});

 public class WeiXinController : Controller
 {
 public static readonly string appid =
 System.Web.Configuration.WebConfigurationManager.AppSettings["wxappid"];

 public static readonly string secret =
 System.Web.Configuration.WebConfigurationManager.AppSettings["wxsecret"];

 public static readonly bool isDedug =
 System.Web.Configuration.WebConfigurationManager.AppSettings["IsDebug"] =="true";


 public static string _ticket = "";

 public static DateTime _lastTimestamp;


 public ActionResult Info(string url,string noncestr)
 {
  if (string.IsNullOrEmpty(_ticket) || 
  _lastTimestamp == null || (_lastTimestamp - DateTime.Now).Milliseconds > 7200)
  {
  var resultString = HTTPHelper.GetHTMLByURL("https://api.weixin.qq.com/cgi-bin/token"
   + appid + "&secret=" + secret);
  dynamic resultValue = JsonConvert.DeserializeObject<dynamic>(resultString);
  if (resultValue == null || resultValue.access_token == null 
  || resultValue.access_token.Value == null)
  {
   return Json(new { issuccess = false, 
   error = "获取token失败" });
  }
  var token = resultValue.access_token.Value;

  resultString = HTTPHelper.GetHTMLByURL
  ("https://api.weixin.qq.com/cgi-bin/ticket/getticket" + 
  token + "&type=jsapi");
  dynamic ticketValue = JsonConvert.DeserializeObject<dynamic>(resultString);
  if (ticketValue == null || ticketValue.errcode == null
  || ticketValue.errcode.Value != 0 || ticketValue.ticket == null)
   return Json(new { issuccess = false,
   error = "获取ticketValue失败" });
  _ticket = ticketValue.ticket.Value;
  _lastTimestamp = DateTime.Now;
  var timestamp = GetTimeStamp();
  var hexString = string.Format("jsapi_ticket={0}&noncestr={3}&timestamp={1}&url={2}",
  _ticket, timestamp, url,noncestr);

  return Json(new {
   issuccess = true, 
   sha1value = GetSHA1Value(hexString), 
   timestamp = timestamp, 
   url = url, 
   appid = appid, 
   debug=isDedug,
   tiket=_ticket
  });
  
  }
  else
  {
  var timestamp = GetTimeStamp();
  var hexString = string.Format("jsapi_ticket={0}&noncestr=1234567890123456&timestamp={1}&url={2}",
   _ticket, timestamp, url);
  return Json(new { 
   issuccess = true, sha1value = GetSHA1Value(hexString),
   timestamp = timestamp, url = url,
   appid = appid, debug = isDedug,tiket = _ticket
  });
  }
 }


 private string GetSHA1Value(string sourceString)
 {
  var hash = SHA1.Create().ComputeHash(Encoding.UTF8.GetBytes(sourceString));
  return string.Join("", 
  hash.Select(b => b.ToString("x2")).ToArray());
 }

 private static string GetTimeStamp()
 {

  TimeSpan ts = DateTime.Now - new DateTime(1970, 1, 1, 0, 0, 0, 0);

  return Convert.ToInt64(ts.TotalSeconds).ToString();

 }

 }
 
 
 
 
 public class HTTPHelper
 {
 public static string GetHTMLByURL(string url)
 {
  string htmlCode = string.Empty;
  try
  {
  HttpWebRequest webRequest = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
  webRequest.Timeout = 30000;
  webRequest.Method = "GET";
  webRequest.UserAgent = "Mozilla/4.0";
  webRequest.Headers.Add("Accept-Encoding", "gzip, deflate");
  HttpWebResponse webResponse = (System.Net.HttpWebResponse)webRequest.GetResponse();
  //获取目标网站的编码格式
  string contentype = webResponse.Headers["Content-Type"];
  Regex regex = new Regex("charset\\s*=\\s*[\\W]", RegexOptions.IgnoreCase);
  if (webResponse.ContentEncoding.ToLower() == "gzip")//如果使用了GZip则先解压
  {
   using (System.IO.Stream streamReceive = webResponse.GetResponseStream())
   {
   using (var zipStream = new System.IO.Compression.GZipStream(streamReceive, System.IO.Compression.CompressionMode.Decompress))
   {
    //匹配编码格式
    if (regex.IsMatch(contentype))
    {
    Encoding ending = Encoding.GetEncoding
    (regex.Match(contentype).Groups[1].Value.Trim());
    using (StreamReader sr = new System.IO.StreamReader(zipStream, ending))
    {
     htmlCode = sr.ReadToEnd();
    }
    }
    else
    {
    using (StreamReader sr = new System.IO.StreamReader(zipStream, Encoding.UTF8))
    {
     htmlCode = sr.ReadToEnd();
    }
    }
   }
   }
  }
  else
  {
   using (System.IO.Stream streamReceive = webResponse.GetResponseStream())
   {
   var encoding = Encoding.Default;
   if (contentype.Contains("utf"))
    encoding = Encoding.UTF8;
   using (System.IO.StreamReader sr = new System.IO.StreamReader(streamReceive, encoding))
   {
    htmlCode = sr.ReadToEnd();
   }

   }
  }
  return htmlCode;
  }
  catch (Exception ex)
  {
  return "";
  }
 }
 }