微信企业号获取用户ID步骤解析

第一步 构造获取用户链接https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx37&redirect_uri=http://14.18.236.78/15/aspx/wxloginpage.aspx&response_type=code&scope=snsapi_base&state=123#wechat_redirect
第二步                 https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx3&redirect_uri=http://14.18.236.78/15/aspx/wx/GET_ADDRESS.aspx&response_type=code&scope=snsapi_base&state=123#wechat_redirect
在目标网页添加以下内容
static string wxid = "";
static string appId = "wx3";//公众号的appId
static string appSecret = "IKZVkzIOw3rxr2AEuO8K0CJfvop_IuLPq5YqX6pGxWkJuY";//公众号的appSecret
/*以下为公共接口调用URL*/
static string appUrl = "https://qyapi.weixin.qq.com/cgi-bin/gettoken";
string code = Request.QueryString["code"].ToString();
string agentid = "15";
string access = GetAccessToken();
string userid = GetUserID(code, agentid, access);
public static  string GetUserID(string code,string agentid ,string accesstoken)
        {
            WebClient webClient = new WebClient();
            Byte[] bytes = webClient.DownloadData(string.Format("{0}{1}&code={2}&agentid={3}", getIDUrl, accesstoken, code, agentid));
            string result = Encoding.GetEncoding("utf-8").GetString(bytes);
            string[] temp = result.Split(',');
            string[] tp = temp[0].Split(':');
            return tp[1].ToString().Replace('"', ' ').Trim().ToString();

        }
public static class Util
        {
            /// <summary>  
            /// Sets the cert policy.  
            /// </summary>  
            public static void SetCertificatePolicy()
            {
                ServicePointManager.ServerCertificateValidationCallback