反序列化Json列出C# [英] Deserialize Json to List C#

问题描述

在反序列化api返回的Json时遇到一些问题.

I'm having some issues on deserializing a Json that the api returns.

Json如下:

{ "Result":[
    {
        "Id": 1, 
        "Type": "Type1"
    },
    {
        "Id": 2, 
        "Type": "Type2"
    }
]}

我正在尝试将其反序列化为这种类型的列表:

I'm trying to deserialize it to a list of this type:

public class ContactType
{
    public int Id { get; set; }
    public string Type { get; set; }
}

下面使用的ReturnType是:List< ContactType>和功能GetContactTypes的调用方式为:

The ReturnType used below is: List< ContactType > and the function GetContactTypes is called this way:

var test = await _items.GetContactTypes<List<ContactType>>(AuthToken.access_token);

使用此代码:

    public async Task<ReturnType> GetContactTypes<ReturnType>(string access_token)
    {
        try
        {
            Header = string.Format("Bearer {0}", access_token);
            client.DefaultRequestHeaders.Add("Authorization", Header);

            HttpResponseMessage response = await client.GetAsync(base_url + "contacttypes");

            if (response.StatusCode == HttpStatusCode.OK)
            {
                return JsonConvert.DeserializeObject<ReturnType>(await response.Content.ReadAsStringAsync());
            }
            else
            {
                return default(ReturnType);
            }
        }
        catch (Exception ex)
        {
            return default(ReturnType);
        }
    }

但我总是会收到此错误:

But I always get this error:

无法将当前JSON对象(例如{"name":"value"})反序列化为类型'System.Collections.Generic.List`1'，因为该类型需要JSON数组(例如[1,2 ，3])正确反序列化.

感谢您的帮助，谢谢.

推荐答案

您要反序列化的对象具有一个包含ContactType数组的单个属性Result-您的对象模型中没有该属性.尝试反序列化此对象:

The object you're trying to deserialize has a single property Result containing the array of ContactType - you dont have that in your object model. Try deserializing to this object:

public class MyClass // give this a more meaningful name
{
    public List<ContactType> Result{ get; set; }
}

public class ContactType
{
    public int Id { get; set; }
    public string Type { get; set; }
}

然后:

...
var test = await _items.GetContactTypes<MyObject>(AuthToken.access_token);
...

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