名为"Id"的成员已存在于“模型"上.使用JsonPropertyAttribute指定其他名称 [英] A member with the name 'Id' already exists on `Model`. Use the JsonPropertyAttribute to specify another name

问题描述

我具有下一个结构的DTO:

I have DTO with next structure :

public class DTO
{
   public int Id {get;set;}
   [JsonProperty("Id")]
   public int ServerId {get;set;}
}

从服务器上，我从下一个模型接收json:

From server I receive json from next model :

public class ServerModel
{
   public int Id {get;set;}
}

我想使用规则 => Id 从服务器映射到 ServerId 属性将json从ServerModel反序列化为DTO.但是目前我得到了错误:

I want to Deserialize json from ServerModel into DTO with rule => Id from server map to ServerId property. But currently I get error :

DTO 上已经存在一个名称为"Id"的成员.使用JsonPropertyAttribute指定另一个名称.

A member with the name 'Id' already exists on DTO. Use the JsonPropertyAttribute to specify another name.

我能以某种方式解决此问题吗?或者我只是可以更改我的ServerModel使其与客户端( DTO )上的内容匹配?

Can I somehow resolve this? Or I just can change my ServerModel to match what I have on client (DTO) ?

推荐答案

如果您只是不想将任何JSON值读取到 DTO.Id 中，则应应用

If you simply don't want to read any JSON values into DTO.Id, you should apply [JsonIgnore] to it:

public class DTO
{
   [JsonIgnore]
   public int Id {get;set;}
   [JsonProperty("Id")]
   public int ServerId {get;set;}
}

已这样做，在反序列化以下JSON后: {"Id":101} ， DTO.ServerId 将获得 101 ，而不会设置 DTO.Id .

Having done so, upon deserializing the following JSON: {"Id" : 101}, DTO.ServerId will get the value of 101 while DTO.Id will not be set.

您正在指定一个JSON数据协定，该协定将两个不同的c#属性映射到名为"Id" 的JSON属性.Json.NET不允许这样做，因为这样的合同无法序列化.

As it is you're specifying a JSON data contract that maps two different c# properties to a JSON property named "Id". This is not allowed by Json.NET, since such a contract could not be serialized.

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