<script src="~/Scripts/jquery-3.3.1.js"></script>

<script src="~/Scripts/jweixin-1.4.0.js"></script>

@*<script src="~/Scripts/jweixin-1.0.0.js"></script>*@

<script>

    wx.config({

        debug: true,

                appId: "@ViewBag.AppId",

                timestamp: "@ViewBag.timestamp",

                nonceStr: "@ViewBag.nonceStr",

                signature: "@ViewBag.signature",

        jsApiList: [

                    "checkJsApi",

                    "onMenuShareAppMessage",

                ]

    });

    wx.ready(function () {

        wx.checkJsApi({

            jsApiList: ['onMenuShareAppMessage'], // 需要检测的JS接口列表，所有JS接口列表见附录2,

            success: function (res) {

                // 以键值对的形式返回，可用的api值true，不可用为false

                // 如：{"checkResult":{"chooseImage":true},"errMsg":"checkJsApi:ok"}

            }

        });

        wx.error(function (res) {

            //alert(res);

        });

        wx.onMenuShareAppMessage({

            title: '测试', // 分享标题

            desc: '测试', // 分享描述

            link: 'http://chwmay.51mypc.cn/Home/Index', // 分享链接，该链接域名或路径必须与当前页面对应的公众号JS安全域名一致

            imgUrl: 'https://i.vzan.cc/image/liveimg/jpeg/2018/4/13/185209cf7bdd0050fd4ced84b0a64aded068ef.jpeg', // 分享图标

            type: 'link',

            dataUrl: '',

            success: function () {

                alert();

            },

            cancel: function () {

                // 用户取消分享后执行的回调函数

            }

        });

    })

</script>

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using WebTestDemo.Code;

namespace WebTestDemo.Controllers

{

    /// <summary>

    /// 微信JSSDK的使用

    /// </summary>

    public class JssdkController : BaseController

    {

        public static string AppId = "";

        public static string timestamp = "";

        public static string nonceStr = "";

        public static string signature = "";

        public ActionResult Index()

        {

            timestamp = JssdkHelper.ConvertDateTimeInt(DateTime.Now).ToString();   //时间戳获取当前时间

            nonceStr = "Test" + new Random().Next(, ) + "Demo";               //随机字符串没有固定的字符和没有特定的格式

            string url = HttpContext.Request.Url.ToString();  // url（当前网页的URL，不包含#及其后面部分）

            url = url.Substring(, url.IndexOf('#') == - ? url.Length : url.IndexOf('#'));

            signature = JssdkHelper.ReturnSignature(timestamp, nonceStr, url);

            ViewBag.AppId = JssdkHelper.appid;

            ViewBag.timestamp = timestamp;

            ViewBag.nonceStr = nonceStr;

            ViewBag.signature = signature;

            return View();

        }

    }

}

    public static class JssdkHelper

    {

        public const string appid = "你的appid";

        public const string appsecret = "你的appsecret ";

        public const string baseurl = "https://api.weixin.qq.com/";

        public const string openurl = "https://open.weixin.qq.com/";

        public const string token = "test";

        public static int ConvertDateTimeInt(DateTime time)

        {

            DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(, , ));

            return (int)(time - startTime).TotalSeconds;

        }

        /// <summary>

        /// 返回签名

        /// </summary>

        /// <param name="signature"></param>

        /// <param name="timestamp"></param>

        /// <param name="nonce"></param>

        /// <returns></returns>

        public static string ReturnSignature(string timestamp, string nonce, string url)

        {

            string tmpStr = string.Empty;

            string jsapi_ticket = Getjsapi_ticket();

            SortedList<string, string> SLString = new SortedList<string, string>();

            SLString.Add("jsapi_ticket", jsapi_ticket);

            SLString.Add("noncestr", nonce);

            SLString.Add("timestamp", timestamp);

            SLString.Add("url", url);

            foreach (KeyValuePair<string, string> des in SLString)  //返回的是KeyValuePair，在学习的时候尽量少用var，起码要知道返回的是什么

            {

                tmpStr += des.Key + "=" + des.Value + "&";

            }

            if (tmpStr.Length > )

                tmpStr = tmpStr.Substring(, tmpStr.Length - );

            return Utils.SHA1Encrypt(tmpStr);

        }

        /// <summary>

        /// 获取Token

        /// </summary>

        /// <returns></returns>

        public static string GetToken()

        {

            string token = CookieHelper.GetCookie(CookieHelper.StrWXTokenCookieName);

            if (string.IsNullOrEmpty(token))

            {

                string url = string.Format("{0}cgi-bin/token?grant_type=client_credential&appid={1}&secret={2}", baseurl, appid, appsecret);

                string str = Utils.HttpGet(url);

                JObject j = JObject.Parse(str);

                token = j.Value<string>("access_token");

            }

            return token;

        }

        public static string Getjsapi_ticket()

        {

            string access_token = GetToken();

            string url = string.Format("https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token={0}&type=jsapi", access_token);

            string backStr = HttpClientHelper.GetResponse(url);

            //string backStr = "{ \"errcode\":0,\"errmsg\":\"ok\",\"ticket\":\"kgt8ON7yVITDhtdwci0qeZWDYY9llY5RrKsWxKD--zOUIRYqJ1XwMo305bwZhG22b5hOl-TZ-gZAXCbMMHwvCw\",\"expires_in\":7200}";

            string str_ticket = backStr.Split(',')[].Split(':')[];

            string Jsapi_ticket = str_ticket.Substring(, str_ticket.Length - );

            return Jsapi_ticket;

        }

    }