C#微信小程序服务端获取用户解密信息实例代码

  string code = ""; 
  string iv = ""; 
  string encryptedData = ""; 
  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 = "wxdb2641f85b04f1b3"; 
  string Secret = "8591d8cd7197b9197e17b3275329a1e7"; 
  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"; 

  AIOWeb.Models.GetUsersHelper GetUsersHelper = new AIOWeb.Models.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(); 
  } 
  if (!string.IsNullOrEmpty(res.openid)) 
  { 
    //用户数据解密 
    GetUsersHelper.AesIV = iv; 
    GetUsersHelper.AesKey = res.session_key; 

    string result = GetUsersHelper.AESDecrypt(encryptedData); 


    //存储用户数据 
    JObject _usrInfo = (JObject)JsonConvert.DeserializeObject(result); 

    userInfo userInfo = new userInfo(); 
    userInfo.openId = _usrInfo["openId"].ToString(); 

    try //部分验证返回值中没有unionId 
    { 
      userInfo.unionId = _usrInfo["unionId"].ToString(); 
    } 
    catch (Exception) 
    { 
      userInfo.unionId = "unionId"; 
    } 

    userInfo.nickName = _usrInfo["nickName"].ToString(); 
    userInfo.gender = _usrInfo["gender"].ToString(); 
    userInfo.city = _usrInfo["city"].ToString(); 
    userInfo.province = _usrInfo["province"].ToString(); 
    userInfo.country = _usrInfo["country"].ToString(); 
    userInfo.avatarUrl = _usrInfo["avatarUrl"].ToString(); 

    object watermark = _usrInfo["watermark"].ToString(); 
    object appid = _usrInfo["watermark"]["appid"].ToString(); 
    object timestamp = _usrInfo["watermark"]["timestamp"].ToString(); 


    #region 


    //创建连接池对象（与数据库服务器进行连接） 
    SqlConnection conn = new SqlConnection("server=127.0.0.1;database=Test;uid=sa;pwd=1"); 
    //打开连接池 
    conn.Open(); 
    //创建命令对象 
    string Qrystr = "SELECT * FROM WeChatUsers WHERE openId='" + userInfo.openId + "'"; 
    SqlCommand cmdQry = new SqlCommand(Qrystr,conn); 
    object obj = cmdQry.ExecuteScalar(); 
    if ((Object.Equals(obj,null)) || (Object.Equals(obj,System.DBNull.Value))) 
    { 
      string str = "INSERT INTO WeChatUsers ([UnionId],[OpenId],[NickName],[Gender],[City],[Province],[Country],[AvatarUrl],[Appid],[Timestamp],[Memo],[counts])VALUES('" + userInfo.unionId + "','" + userInfo.openId + "','" + userInfo.nickName + "','" + userInfo.gender + "','" + userInfo.city + "','" + userInfo.province + "','" + userInfo.country + "','" + userInfo.avatarUrl + "','" + appid.ToString() + "','" + timestamp.ToString() + "','来自微信小程序','1')"; 

      SqlCommand cmdUp = new SqlCommand(str,conn); 
      // 执行操作 
      try 
      { 
        int row = cmdUp.ExecuteNonQuery(); 
      } 
      catch (Exception ex) 
      { 
        context.Response.Write(ex.ToString()); 
      } 
    } 
    else 
    { 
      //多次访问，记录访问次数counts  更新unionId是预防最初没有，后期关联后却仍未记录 
      string str = "UPDATE dbo.WeChatUsers SET counts = counts+1，UnionId = '" + userInfo.unionId + "' WHERE OpenId='" + userInfo.openId + "'"; 
      SqlCommand cmdUp = new SqlCommand(str,conn); 
      int row = cmdUp.ExecuteNonQuery(); 
    } 

    //关闭连接池 
    conn.Close(); 
    #endregion 

    //返回解密后的用户数据 
    context.Response.Write(result); 
  } 
  else 
  { 
    context.Response.Write(j); 
  } 
} 

public bool IsReusable 
{ 
  get 
  { 
    return false; 
  } 
} 

}
}

/// <summary> 
/// 获取链接返回数据 
/// </summary> 
/// <param name="Url"&gt;链接</param> 
/// <param name="type"&gt;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"&gt;输入的数据encryptedData</param> 
/// <param name="AesKey"&gt;key</param> 
/// <param name="AesIV"&gt;向量128</param> 
/// <returns name="result"&gt;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; 

  } 
} 
#endregion 

}
}