如何使用JSON.NET反序列化部分JSON对象
本文关键字:JSON 对象 反序列化部 NET 何使用 | 更新日期: 2023-09-27 18:08:25
我正在做一个asp.net mvc web应用程序。我正在接收以下json对象:-
{
"operation":{
"name":"GET RESOURCE ACCOUNTLIST",
"result":{
"status":"Success",
"message":"Resource details with account list fetched successfully"
},
"Details":{
"RESOURCE ID":"1",
"RESOURCE NAME":"test resource",
"RESOURCE DESCRIPTION":"",
"RESOURCE TYPE":"Windows",
"DNS NAME":"172.16.20.101",
"PASSWORD POLICY":"Strong",
"DEPARTMENT":"",
"LOCATION":"",
"RESOURCE URL":"",
"RESOURCE OWNER":"admin",
"ACCOUNT LIST":[
{
"ISFAVPASS":"false",
"ACCOUNT NAME":"root",
"PASSWDID":"1",
"IS_TICKETID_REQD_MANDATORY":"false",
"ISREASONREQUIRED":"false",
"AUTOLOGONLIST":[
"Windows Remote Desktop",
"Remote Desktop"
],
"PASSWORD STATUS":"****",
"IS_TICKETID_REQD":"false",
"ACCOUNT ID":"1",
"AUTOLOGONSTATUS":"User is not allowed to automatically logging in to remote systems in mobile",
"IS_TICKETID_REQD_ACW":"false"
}
]
}
}
}
我正在使用JSON。. NET来执行反序列化,因此我创建了以下模型类(我没有包含JSON对象接收到的所有属性,因为我并不真正需要它们)。
public class ResourceAccountListInfo
{
public Operation2 operation { get; set; }
}
public class Operation2
{
public string name { get; set; }
public Result result { get; set; }
public IList<Details2> Details { get; set; }
}
public class Details2
{
[JsonProperty("RESOURCE DESCRIPTION")]
public string RESOURCEDESCRIPTION { get; set; }
[JsonProperty("RESOURCE NAME")]
public string RESOURCENAME { get; set; }
[JsonProperty("RESOURCE ID")]
public string RESOURCEID { get; set; }
[JsonProperty("RESOURCE TYPE")]
public string RESOURCETYPE { get; set; }
[JsonProperty("DNS NAME")]
public string DNSNAME { get; set; }
[JsonProperty("ACCOUNT LIST")]
public IList<ACCOUNTLIST> ACCOUNTLIST { get; set; }
}
当我尝试使用此语句反序列化json时,我得到以下错误:
ResourceAccountListInfo resourceAccountListInfo = JsonConvert.DeserializeObject<ResourceAccountListInfo>(json);
错误是:
Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.IList`1[T.ViewModels.Details2]' because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly.
To fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List<T>) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object.
Path 'operation.Details.['RESOURCE ID']', line 1, position 171
我认为问题是,有一些属性在我的JSON对象里面没有映射模型类,这可能是一个原因吗?
这里的错误信息实际上很有指导意义:
无法将当前JSON对象(例如{"name":"value"})反序列化为类型'System.Collections.Generic.IList ' 1[T.ViewModels. view]。因为该类型需要一个JSON数组(例如[1,2,3])来正确反序列化。要修复此错误,要么将JSON更改为JSON数组(例如[1,2,3]),要么更改反序列化类型,使其成为可以从JSON对象反序列化的普通。net类型(例如,不是像整数这样的原始类型,也不是像数组或列表这样的集合类型)。还可以将JsonObjectAttribute添加到类型中,以强制它从JSON对象进行反序列化。operation.Details路径"。['RESOURCE ID']',第1行,位置171
它告诉你的是它有一个对象,你已经要求它将它反序列化为一个集合。它不能那样做,因为它一开始就不是一个集合。
你的模型中有:
public IList<Details2> Details { get; set; }
但是在json中对应的details
属性是:
"Details":{
"RESOURCE ID":"1",
"RESOURCE NAME":"test resource",
"RESOURCE DESCRIPTION":"",
"RESOURCE TYPE":"Windows",
"DNS NAME":"172.16.20.101",
"PASSWORD POLICY":"Strong",
"DEPARTMENT":"",
"LOCATION":"",
"RESOURCE URL":"",
"RESOURCE OWNER":"admin",
"ACCOUNT LIST":[
{
"ISFAVPASS":"false",
"ACCOUNT NAME":"root",
"PASSWDID":"1",
"IS_TICKETID_REQD_MANDATORY":"false",
"ISREASONREQUIRED":"false",
"AUTOLOGONLIST":[
"Windows Remote Desktop",
"Remote Desktop"
],
"PASSWORD STATUS":"****",
"IS_TICKETID_REQD":"false",
"ACCOUNT ID":"1",
"AUTOLOGONSTATUS":"User is not allowed to automatically logging in to remote systems in mobile",
"IS_TICKETID_REQD_ACW":"false"
}
]
}
这是一个对象(注意花括号{}
)。
Details
属性为:
public Details2 Details { get; set; }
json details
中没有相应Details2
属性的任何属性都将被静默忽略。因此,不需要映射json中的每个属性,只映射你真正关心的属性。
您可以使用JObject
与dynamic
:
dynamic json = JObject.Parse(jsonString);
然后以您想要的方式填充您的模型,而无需创建整个类层次结构:
var operationName = json.operation.name;
请注意:使用dynamic
,您的属性将在运行时创建。这意味着你将没有智能感知支持,如果你试图调用不存在的方法或属性,你将得到一个运行时异常。所以,使用这种方法要非常小心。