用Json.NET解析C＃json

Question

我正在使用Web API制作Steam的朋友列表管理工具。 该API返回以下JSON：

{
"friendslist": {
    "friends": [
        {
            "steamid": "12345678",
            "relationship": "friend",
            "friend_since": 1290444866
        },
        {
            "steamid": "87654321",
            "relationship": "friend",
            "friend_since": 1421674782
        },
        {
            "steamid": "5287931",
            "relationship": "friend",
            "friend_since": 1418428351
        }
    ]
}

我尝试用以下代码解析它：

public class Friendslist
{
    public IDictionary<int, IDictionary<int, Friend>> friends { get; set; }
}

public class Friend
{
    public uint steamid { get; set; }
    public string relationship { get; set; }
    public uint friend_since { get; set; }
}

        string jsonString;
        Friendslist jsonData;
        WebRequest wr;
        Stream objStream;
        wr = WebRequest.Create(sURL);
        objStream = wr.GetResponse().GetResponseStream();
        StreamReader objReader = new StreamReader(objStream);
        jsonString = objReader.ReadToEnd();
        jsonData = JsonConvert.DeserializeObject<Friendslist>(jsonString);

但是当我使用调试器检查jsonData时，它始终为null。

Answer 1

你的模特应该像

public class Friend
{
    public string steamid { get; set; }
    public string relationship { get; set; }
    public int friend_since { get; set; }
}

public class Friendslist
{
    public List<Friend> friends { get; set; }
}

public class RootObject
{
    public Friendslist friendslist { get; set; }
}

现在您可以反序列化为

var root = JsonConvert.DeserializeObject<RootObject>(jsonString);

看到这个有用的网站http://json2csharp.com/