Question

我收到错误：

System.InvalidOperationException：不支持类型“VK.Response” 用于反序列化数组。

我看起来像JSON：

{ “响应”：[{ “ID”：269058571 “如first_name”： “姓名”， “姓氏”： “名字”， “photo_50”：“http://cs624717.vk.me/v624717571/21718 /X8.jpg“}]}

我的方法是：

def new
  if (logged_in?)
    flash[:danger] = "You're already logged in"
    redirect_to root_url
  end
  @organization = Organization.new
  @member = @organization.members.build
end

类：

 private void getFriendInfo()
    {
        string method = "users.get";
        string param = "user_ids=269058571&fields=photo_50";
        string url = "https://api.vk.com/method/" + method + "?" + param + "&v=5.31&access_token=" + key + "";

        WebClient client = new WebClient();

        string json = client.DownloadString(url);
        JavaScriptSerializer json_serializer = new JavaScriptSerializer();
        RootObject response = (RootObject)json_serializer.Deserialize(json, typeof(RootObject));
        for (int counter = 0; counter < response.response.items.Count; counter++)
        {
            pictureBox1.Load(response.response.items[counter].photo_50);
        }
    }

Answer 1

尝试声明你的＆＃34; RootObject＆＃34;像这样的课：

class RootObject
       {
            public List<Response> response { get; set; }
       }

Answer 2

您的对象模型没有与json对齐。试试这个（我现在使用的是Newtonsoft.Json，它是现在的标准JSON lib，而不是使用w / .Net的那个）使用nuget包管理器来获取它... https://www.nuget.org/packages/newtonsoft.json/：

using System;
using System.Collections.Generic;
using Newtonsoft.Json;

public class Program
{
    public static void Main()
    {
        var json = "{\"response\":[{\"id\":269058571,\"first_name\":\"Name\",\"last_name\":\"LastName\",\"photo_50\":\"http://cs624717.vk.me/v624717571/21718/X8.jpg\"}]}";

        var obj = JsonConvert.DeserializeObject<RootObject>(json);

        foreach(var item in obj.response) {
            Console.WriteLine(item.first_name);
        }           
    }
}

class RootObject
{
    public List<Item> response { get; set; }
}
class Item
{
    public string first_name { get; set; }
    public string last_name { get; set; }
    public string domain { get; set; }
    public string photo_50 { get; set; }
}

现场示例：https://dotnetfiddle.net/WJwvm3

对阵列进行反序列化不支持类

2 个答案: