WeChatUtil类

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

    public class WeChatUtil
    {
        /// <summary>
        /// 获取TOKEN
        /// </summary>
        /// <param name="strCorpid">企业号标识</param>
        /// <param name="strSecret">微信获取token地址</param>
        /// <param name="strSecret">具体应用Secret</param>
        /// <param name="strWeChatServiceUrl">微信接口处理地址</param>
        /// <returns></returns>
        public string GetAccessToken(string strCorpid, string strSecret, string accesstokenurl, string strWeChatServiceUrl)
        {
            string strAccessToken = string.Empty;  
            string strGetTokenUrl = strWeChatServiceUrl + "?action=gettoken";
            Dictionary<string, string> dic = new Dictionary<string, string>();
            dic.Add("corpid", strCorpid);
            dic.Add("corpsecret", strSecret);
            HttpRequestUtil httpUtil = new HttpRequestUtil();
            strAccessToken = httpUtil.SendHttpGetRequest(strGetTokenUrl, dic);
            if (!string.IsNullOrEmpty(strAccessToken))
            {
                return strAccessToken;
            }

            //重新获取AccessToken
            
            HttpRequestUtil util = new HttpRequestUtil();
            string strResult = util.SendHttpGetRequest(accesstokenurl, dic);
            //解析出token  
            //{"access_token":"DGubVxT5W-SaeYgGjJA6anTzkl6XnlP-WlsWpoKcUNGkha5ZI6ePHRefmTlG7-IB","expires_in":7200}
            JObject jobject = JsonConvert.DeserializeObject<JObject>(strResult);
            strAccessToken = jobject["access_token"].ToString();
            string strExpire = jobject["expires_in"].ToString();

            //更新数据库
            string strUpdateTokenUrl = strWeChatServiceUrl;
            Dictionary<string, string> dicUpdateToken = new Dictionary<string, string>();
            dic.Add("action", "updatetoken");
            dic.Add("token", strAccessToken);//传递四个参数过去
            dic.Add("expires_in", strExpire);
            strResult = httpUtil.SendHttpGetRequest(strUpdateTokenUrl, dic);
            return strAccessToken;
        }
    }