<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(1);},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(1, 1000) + "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(0, url.IndexOf('#') == -1 ? 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(1970, 1, 1));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 > 0)tmpStr = tmpStr.Substring(0, tmpStr.Length - 1);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(',')[2].Split(':')[1];string Jsapi_ticket = str_ticket.Substring(1, str_ticket.Length - 2);return Jsapi_ticket;}}