从Pokeapi解析JSON

Question

我正在尝试理解如何调用API (Pokeapi)并将响应中接收到的数据解析为C#中外部库(PokeApi.NET)中的对象。

我在C#代码中收到了响应，但在将响应解析为对象时遇到了困难。

我认为问题出在最后一行代码，但我不确定它应该是什么？

C#代码：

private static string URL = "http://pokeapi.co/api/v2/pokemon/";

static async void GetPokemonAsync()
{
    string page = URL;

    using (HttpClient client = new HttpClient())
    using (HttpResponseMessage response = await client.GetAsync(page))
    using (HttpContent content = response.Content)
    {
        string result = await content.ReadAsStringAsync();

        if (result != null && result.Length >= 50)
        {
            Console.WriteLine(result.Substring(0,200));
            PokeAPI.Pokemon a = JsonConvert.DeserializeObject<PokeAPI.Pokemon>(result);
        }
    }
}

结果示例：

{"count":811,"previous":null,"results":[{"url":"http:\/\/pokeapi.co\/api\/v2\/pokemon\/1\/","name":"bulbasaur"},{"url":"http:\/\/pokeapi.co\/api\/v2\/pokemon\/2\/","name":"ivysaur"},{"url":"http:\/\/pokeapi.co\/api\/v2\/pokemon\/3\/","name":"venusaur"},{"url":"http:\/\/pokeapi.co\/api\/v2\/pokemon\/4\/","name":"charmander"},{"url":"http:\/\/pokeapi.co\/api\/v2\/pokemon\/5\/","name":"charmeleon"},{"url":"http:\/\/pokeapi.co\/api\/v2\/pokemon\/6\/","name":"charizard"},...

Answer 1

这应该是你的类结构。

public class Result
{
    public string url { get; set; }
    public string name { get; set; }
}

public class Pokemon
{
    public int count { get; set; }
    public object previous { get; set; }
    public List<Result> results { get; set; }
}

这必须是有效的json。

{
"count": 811,
"previous": null,
"results": [{
    "url": "http:\/\/pokeapi.co\/api\/v2\/pokemon\/1\/",
    "name": "bulbasaur"
}, {
    "url": "http:\/\/pokeapi.co\/api\/v2\/pokemon\/2\/",
    "name": "ivysaur"
}, {
    "url": "http:\/\/pokeapi.co\/api\/v2\/pokemon\/3\/",
    "name": "venusaur"
}, {
    "url": "http:\/\/pokeapi.co\/api\/v2\/pokemon\/4\/",
    "name": "charmander"
}, {
    "url": "http:\/\/pokeapi.co\/api\/v2\/pokemon\/5\/",
    "name": "charmeleon"
}, {
    "url": "http:\/\/pokeapi.co\/api\/v2\/pokemon\/6\/",
    "name": "charizard"
}]
}

Answer 2

使用Newtonsoft包，您可以反序列化JSON，如下例所示。还可以使用json2sharp工具从JSON生成C#类。

如果你在Visual Studio中有Web Essentials，你总是可以使用

JSON >选择性粘贴>粘贴为类。

public class Result
{
    public string url { get; set; }
    public string name { get; set; }
}

public class RootObject
{
    public int count { get; set; }
    public object previous { get; set; }
    public List<Result> results { get; set; }
}

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