c# 调用微信小程序

//微信也不给个c#调用的例子 只好自己造咯；ps:大佬勿喷
 1 public string GetWx(string code, string iv, string encryptedData)
         {
             // context.Response.ContentType = "text/plain";
             string xx = "";
             try
             {
                 //code = HttpContext.Current.Request.QueryString["code"].ToString();
                 //iv = HttpContext.Current.Request.QueryString["iv"].ToString();
                 //encryptedData = HttpContext.Current.Request.QueryString["encryptedData"].ToString();
             }
             catch (Exception ex)
             {
                 //  context.Response.Write(ex.ToString());
             }

             string Appid = "wx187bd36d7393af6b";
             string Secret = "8f14745e1dd01cedbdcac790aa397149";
             string grant_type = "authorization_code";

             //向微信服务端 使用登录凭证 code 获取 session_key 和 openid
             string url = "https://api.weixin.qq.com/sns/jscode2session?appid=" + Appid + "&secret=" + Secret + "&js_code=" + code + "&grant_type=" + grant_type;
             string type = "utf-8";

             GetUsersHelper GetUsersHelper = new GetUsersHelper();
             string j = GetUsersHelper.GetUrltoHtml(url, type);//获取微信服务器返回字符串 

             //将字符串转换为json格式
             JObject jo = (JObject)JsonConvert.DeserializeObject(j);

             result res = new result();
             try
             {
                 //微信服务器验证成功
                 res.openid = jo["openid"].ToString();
                 res.session_key = jo["session_key"].ToString();
             }
             catch (Exception)
             {
                 //微信服务器验证失败
                 res.errcode = jo["errcode"].ToString();
                 res.errmsg = jo["errmsg"].ToString();
             }
             return res.openid;
         }

         public class GetUsersHelper
         {

             /// <summary>
             /// 获取链接返回数据
             /// </summary>
             /// <param name="Url">链接</param>
             /// <param name="type">请求类型</param>
             /// <returns></returns>
             public string GetUrltoHtml(string Url, string type)
             {
                 try
                 {
                     System.Net.WebRequest wReq = System.Net.WebRequest.Create(Url);
                     // Get the response instance.
                     System.Net.WebResponse wResp = wReq.GetResponse();
                     System.IO.Stream respStream = wResp.GetResponseStream();
                     // Dim reader As StreamReader = New StreamReader(respStream)
                     using (System.IO.StreamReader reader = new System.IO.StreamReader(respStream, Encoding.GetEncoding(type)))
                     {
                         return reader.ReadToEnd();
                     }
                 }
                 catch (System.Exception ex)
                 {
                     return ex.Message;
                 }
             }

 #region 微信小程序用户数据解密

            public static string AesKey;
            public static string AesIV;

            /// <summary>
            /// AES解密
            /// </summary>
            /// <param name="inputdata">输入的数据encryptedData</param>
            /// <param name="AesKey">key</param>
            /// <param name="AesIV">向量128</param>
            /// <returns name="result">解密后的字符串</returns>
            public string AESDecrypt(string inputdata)
            {
                try
                {
                    AesIV = AesIV.Replace(" ", "+");
                    AesKey = AesKey.Replace(" ", "+");
                    inputdata = inputdata.Replace(" ", "+");
                    byte[] encryptedData = Convert.FromBase64String(inputdata);

                    RijndaelManaged rijndaelCipher = new RijndaelManaged();
                    rijndaelCipher.Key = Convert.FromBase64String(AesKey); // Encoding.UTF8.GetBytes(AesKey);
                    rijndaelCipher.IV = Convert.FromBase64String(AesIV);// Encoding.UTF8.GetBytes(AesIV);
                    rijndaelCipher.Mode = CipherMode.CBC;
                    rijndaelCipher.Padding = PaddingMode.PKCS7;
                    ICryptoTransform transform = rijndaelCipher.CreateDecryptor();
                    byte[] plainText = transform.TransformFinalBlock(encryptedData, , encryptedData.Length);
                    string result = Encoding.UTF8.GetString(plainText);

                    return result;
                }
                catch (Exception)
                {
                    return null;

                }
            }

            /// <summary>
            /// 根据微信小程序平台提供的解密算法解密数据
            /// </summary>
            /// <param name="encryptedData">加密数据</param>
            /// <param name="iv">初始向量</param>
            /// <param name="sessionKey">从服务端获取的SessionKey</param>
            /// <returns></returns>
            public userInfo Decrypt(string encryptedData, string iv, string sessionKey)
            {
                userInfo userInfo;
                //创建解密器生成工具实例
                AesCryptoServiceProvider aes = new AesCryptoServiceProvider();
                //设置解密器参数
                aes.Mode = CipherMode.CBC;
                aes.BlockSize = ;
                aes.Padding = PaddingMode.PKCS7;
                //格式化待处理字符串
                byte[] byte_encryptedData = Convert.FromBase64String(encryptedData);
                byte[] byte_iv = Convert.FromBase64String(iv);
                byte[] byte_sessionKey = Convert.FromBase64String(sessionKey);

                aes.IV = byte_iv;
                aes.Key = byte_sessionKey;
                //根据设置好的数据生成解密器实例
                ICryptoTransform transform = aes.CreateDecryptor();

                //解密
                byte[] final = transform.TransformFinalBlock(byte_encryptedData, , byte_encryptedData.Length);

                //生成结果
                string result = Encoding.UTF8.GetString(final);

                //反序列化结果，生成用户信息实例
                userInfo = JsonConvert.DeserializeObject<userInfo>(result);

                return userInfo;

            }

            #endregion
        }

        public class wechat
        {
        }
        #region 实体类
        /// <summary>
        /// 微信用户类
        /// </summary>
        public class userInfo
        {
            public string openId { get; set; }
            public string nickName { get; set; }
            public string gender { get; set; }
            public string city { get; set; }
            public string province { get; set; }
            public string country { get; set; }
            public string avatarUrl { get; set; }
            public string unionId { get; set; }
            public data watermark { get; set; }
        }
        /// <summary>
        /// 微信用户数据水印
        /// </summary>
        public class data
        {
            public string appid { get; set; }
            public string timestamp { get; set; }
        }
        /// <summary>
        /// 微信小程序验证返回结果
        /// </summary>
        public class result
        {
            public string openid { get; set; }
            public string session_key { get; set; }
            public string errcode { get; set; }
            public string errmsg { get; set; }
        }
        #endregion