.NET Core实现企业微信消息推送

{
  "errcode" : 0,
  "errmsg" : "ok",
  "invaliduser" : "userid1|userid2",
  "invalidparty" : "partyid1|partyid2",
  "invalidtag": "tagid1|tagid2",
  "msgid": "xxxx",
  "response_code": "xyzxyz"
}

{
   "touser" : "UserID1|UserID2|UserID3",
   "toparty" : "PartyID1|PartyID2",
   "totag" : "TagID1 | TagID2",
   "msgtype" : "text",
   "agentid" : 1,
   "text" : {
       "content" : "你的快递已到，请携带工卡前往邮件中心领取。\n出发前可查看<a href=\"Http://work.weixin.qq.com\">邮件中心视频实况</a>，聪明避开排队。"
   },
   "safe":0,
   "enable_id_trans": 0,
   "enable_duplicate_check": 0,
   "duplicate_check_interval": 1800
}

 "Wx": {
    "Baseurl": "https://qyapi.weixin.qq.com/cgi-bin/",
    "TokenUrl": "gettoken?corpid=xx&corpsecret=xx",
    "PushUrl": "message/send?access_token={0}"
  },

        public void ConfigureServices(IServiceCollection services)
        {
              services.AddHttpClient("WxClient", config =>
              {
                 config.BaseAddress = new Uri(Configuration["Wx:baseurl"]);
                 config.DefaultRequestHeaders.Add("Accept", "application/json");
              });

            GlobalContext.Configuration = Configuration;
        }

        public void Configure(IApplicationBuilder app, IWEBHostEnvironment env)
        {
            GlobalContext.HttpClientFactory = app.ApplicationServices.GetService<IHttpClientFactory>();
        }

    public class GetTokenResult
    {

        /// <summary>
        /// 错误编号
        /// </summary>
        public int errcode { get; set; }

        /// <summary>
        /// 错误信息
        /// </summary>
        public string errmsg { get; set; }

        /// <summary>
        /// Token
        /// </summary>
        public string access_token { get; set; }

        /// <summary>
        /// 过期时间
        /// </summary>
        public int expires_in { get; set; }
    }

using Microsoft.Extensions.Configuration;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.net.Http;
using System.Text;
using System.Threading.Tasks;

namespace TaskScheduling.Wx
{
    public class GlobalContext
    {
        public static IConfiguration Configuration { get; set; }

        public static IHttpClientFactory HttpClientFactory { get; set; }


        /// <summary>
        /// 过期时间
        /// </summary>
        public static DateTime TimeOutDate { get; set; }

        /// <summary>
        /// Token
        /// </summary>
        public static string Token { get; set; }


        /// <summary>
        /// 获取Token
        /// </summary>
        /// <returns>Item1 Token;Item2 是否成功</returns>
        public static Tuple<string, bool> GetToken()
        {
            //判断Token是否存在 以及Token是否在有效期内
            if (string.IsNullOrEmpty(Token) || TimeOutDate > DateTime.Now)
            {
                //构造请求链接
                var requestBuild = Configuration["Wx:TokenUrl"];
                using (var wxClient = HttpClientFactory.CreateClient("WxClient"))
                {
                    var httpResponse = wxClient.GetAsync(requestBuild).Result;
                    var dynamic = JsonConvert.DeserializeObject<GetTokenResult>(
                                          httpResponse.Content.ReadAsStringAsync().Result
                                          );
                    if (dynamic.errcode == 0)
                    {
                        Token = dynamic.access_token;
                        //过期5分钟前刷新Token
                        var expires_in = Convert.ToDouble(dynamic.expires_in - 5 * 60);
                        TimeOutDate = DateTime.Now.AddSeconds(expires_in);
                        return Tuple.Create(Token, true);
                    }
                    else
                    {
                        return Tuple.Create($"获取Token失败，错误：{ dynamic.errmsg}", false);
                    }
                }
            }
            else
            {
                return Tuple.Create(Token, true);
            }
        }

        /// <summary>
        /// 推送MES
        /// </summary>
        /// <returns>Item1 Token;Item2 是否成功</returns>
        public static string WxPush(string content)
        {
            //构造请求链接
            var requestBuild = Configuration["Wx:PushUrl"];
            var (token, issuccess) = GetToken();
            if (!issuccess)
                throw new Exception(token);
            requestBuild = string.FORMat(requestBuild, token);
            //建立HttpClient
            using (var wxClient = HttpClientFactory.CreateClient("WxClient"))
            {
                byte[] data = Encoding.UTF8.GetBytes(content);
                var bytearray = new ByteArrayContent(data);
                var httpResponse = wxClient.PostAsync(requestBuild, bytearray).Result;
                var dynamic = JsonConvert.DeserializeObject<dynamic>(
                                     httpResponse.Content.ReadAsStringAsync().Result
                                     );
                if (dynamic.errcode == 0)
                    return "推送成功！";
                else
                    throw new Exception($"推送失败,原因:{JsonConvert.SerializeObject(dynamic) }");
            }
        }

        /// <summary>
        /// 获取发送内容
        /// </summary>
        /// <param name="userId"></param>
        /// <param name="Msg"></param>
        /// <returns></returns>
        public static string GetContent(string userId, string msg)
        {
            var objText = new { content = msg };
            string text = JsonConvert.SerializeObject(objText);
            var obj = new
            {
                touser = userId,
                toparty = "",
                totag = "",
                msgtype = "text",
                agentid = 1000051,//应用id
                text = objText,
                safe = 0,
                enable_id_trans = 0,
                enable_duplicate_check = 0,
                duplicate_check_interval = 1800
            };
            string strJson = JsonConvert.SerializeObject(obj);
            return strJson;
        }
    }
}

string userid = "userid";
var content1 = GlobalContext.GetContent(userid, "推送测试");
return GlobalContext.WxPush(content1);