C# 无法使用数组反序列化复杂的 Json 对象

Question

所以我使用HttpClient()从 web api 获取 Json 对象。该对象包含一个国家/地区所有省份的列表。

这段代码调用了json反序列化:

rj = JsonConvert.DeserializeObject<RajaOngkirCity>(response);

响应是这样的:

{
    "rajaongkir": {
        "query": {
            "key": "xxxxxxxxxxxxxxxxxxxxx"
        },
        "status": {
            "code": 200,
            "description": "OK"
        },
        "results": [{
                "province_id": "1",
                "province": "Bali"
            },
            {
                "province_id": "2",
                "province": "Bangka Belitung"
            },
        .....]
    }
}

这些是我的类(class):

public class RajaOngkirState
{
    [JsonProperty("rajaongkir")]
    public RajaOngkirStateResult RajaOngkir { get; set; }
}

public class RajaOngkirStateResult
{
    [JsonProperty("query")]
    public RajaOngkirStateQuery StateQuery { get; set; }

    [JsonProperty("status")]
    public RajaOngkirStateStatus Status { get; set; }

    [JsonProperty("results")]
    public RajaOngkirStateResults Results { get; set; }
}

public class RajaOngkirStateQuery
{
    [JsonProperty("key")]
    public string Key { get; set; }
}

public class RajaOngkirStateStatus
{
    [JsonProperty("code")]
    public int Code { get; set; }
    [JsonProperty("description")]
    public string Description { get; set; }
}

public class RajaOngkirStateResults
{
    public List<RajaOngkirStateList> States { get; set; }
}

public class RajaOngkirStateList
{
    [JsonProperty("province_id")]
    public int ProvinceId { get; set; }
    [JsonProperty("province")]
    public string Province { get; set; }
}

似乎rajaongkir.results这导致了我的问题。

以下是我尝试过的:

1. 我尝试更改 province_id键入字符串，但仍然错误。
2. 我试图改变 List<RajaOngkirStateList> States进入Dictionary<string, RajaOngkirStateList>但仍然出错。

我得到的错误:

Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'ECommerce.ShippingMethod.RajaOngkir.RajaOngkirStateResults' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly. To fix this error either change the JSON to a JSON object (e.g. {"name":"value"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array. Path 'rajaongkir.results', line 1, position 118.

Answer 1

目前您的 Results 属性声称是一个包含数组的对象 - 就好像您的 JSON 看起来像这样:

"results": {
    states: [{
              "province_id": "1",
              "province": "Bali"
            },
            {
              "province_id": "2",
              "province": "Bangka Belitung"
            }
    ]}

相反，JSON 中的 results 属性是列表。

所以您需要做的就是完全删除 RajaOngkirStateResults 类，并将您的 Results 属性更改为:

[JsonProperty("results")]
public List<RajaOngkirStateList> Results { get; set; }

我个人将 RajaOngkirStateList 重命名为 RajaOngkirState，因为它不是列表，但这是另一回事。