c# - Newtonsoft JSON 反序列化问题 [将值转换为类型时出错]

Question

利用 C# Newtownsoft JSON 库...我遇到了这个问题。

搭建舞台...

我有来自 RESTful Web 服务的 JSON:

[
    {
        "CorporateArea": "Brampton",
        "ServiceAddress": "321 Heart Lake Road",
        "VendorName": "Enbridge Gas Distribution Inc",
        "MeterNumber": "502105",
        "RateClass": "NG-R6",
        "Department": "22603",
        "Account": "12008",
        "VendorID": "0000001195",
        "MeterLevelID": 2882,
        "SiteAddressID": 468,
        "MappingLocation": "Beckett Sproule",
        "ElectricalBilling": "",
        "EnergyLine": "",
        "CorporateGroup": "Public Works"
    }
]

我还有这些 C# 类:

public class AccountInfo
{
    [JsonProperty("Account")]
    public string Account { get; set; }

    [JsonProperty("CorporateArea")]
    public string CorporateArea { get; set; }

    [JsonProperty("CorporateGroup")]
    public string CorporateGroup { get; set; }

    [JsonProperty("Department")]
    public string Department { get; set; }

    [JsonProperty("ElectricalBilling")]
    public string ElectricalBilling { get; set; }

    [JsonProperty("EnergyLine")]
    public string EnergyLine { get; set; }

    [JsonProperty("MappingLocation")]
    public string MappingLocation { get; set; }

    [JsonProperty("MeterLevelID")]
    public string MeterLevelID { get; set; }

    [JsonProperty("MeterNumber")]
    public string MeterNumber { get; set; }

    [JsonProperty("RateClass")]
    public string RateClass { get; set; }

    [JsonProperty("ServiceAddress")]
    public string ServiceAddress { get; set; }

    [JsonProperty("SiteAddressID")]
    public string SiteAddressID { get; set; }

    [JsonProperty("VendorID")]
    public string VendorID { get; set; }

    [JsonProperty("VendorName")]
    public string VendorName { get; set; }
}

public class JSONArray {
   public IList<AccountInfo> AccountsInfo { get; set; }
}

根据这些，我将其称为 Newtownsoft 方法:

JSONArray Accounts = JsonConvert.DeserializeObject<JSONArray> (responseBody,
   new JsonSerializerSettings
   {
      NullValueHandling = NullValueHandling.Ignore
   });

但每次这样做时，我都会收到异常 Newtonsoft.Json.JsonSerializationException 错误消息:

Error converting value "[{"CorporateArea":"Brampton","ServiceAddress":"321 Heart Lake Road","VendorName":"Enbridge Gas Distribution Inc","MeterNumber":"502105","RateClass":"NG-R6","Department":"22603","Account":"12008","VendorID":"0000001195","MeterLevelID":2882,"SiteAddressID":468,"MappingLocation":"Beckett Sproule","ElectricalBilling":"","EnergyLine":"","CorporateGroup":"Public Works"}]" to type 'TestWebService_Consume.JSONArray'. Path '', line 1, position 421.

我尝试弄乱 JSON 字符串，使其不是一个数组，并将其转换为一个简单的 AccountsInfo 对象，它返回相同的错误。

我肯定做错了什么，但自从我使用 Newtonsoft JSON 库以来已经有一段时间了，所以我不知道这里可能存在什么问题。

Answer 1

JSON 的反序列化输出是在尝试使用时

JSONArray Accounts = JsonConvert.DeserializeObject<JSONArray>(json, new JsonSerializerSettings
                           {
                               NullValueHandling = NullValueHandling.Ignore
                           });

是

Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'JustSO.JSONArray' 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.

但是如果你这样尝试

List<AccountInfo> lc = JsonConvert.DeserializeObject<List<AccountInfo>>(json, new JsonSerializerSettings
{
    NullValueHandling = NullValueHandling.Ignore
});

或

List<AccountInfo> lc = JsonConvert.DeserializeObject<List<AccountInfo>>(json);

会将生成的 json 提供给对象。