[英]How can I tell Json.NET to ignore properties in a 3rd-party object?
The Json.NET documentation says you use JsonIgnore
to not serialize certain properties in your classes: Json.NET文档说您使用
JsonIgnore
来不序列化类中的某些属性:
public class Account
{
public string FullName { get; set; }
public string EmailAddress { get; set; }
[JsonIgnore]
public string PasswordHash { get; set; }
}
How can I make Json.NET ignore specific properties when serializing a 3rd-party object with JsonConvert.SerializeObject
? 使用
JsonConvert.SerializeObject
序列化第三方对象时,如何使Json.NET忽略特定属性?
Make a custom contract resolver: 制作自定义合同解析器:
public class ShouldSerializeContractResolver : DefaultContractResolver
{
public static ShouldSerializeContractResolver Instance { get; } = new ShouldSerializeContractResolver();
protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
{
JsonProperty property = base.CreateProperty(member, memberSerialization);
if (typeof(Account).IsAssignableFrom(member.DeclaringType) && member.Name == nameof(Account.PasswordHash))
{
property.Ignored = true;
}
return property;
}
}
How I test it: 我如何测试它:
var account = new Account
{
PasswordHash = "XXAABB"
};
var settings = new JsonSerializerSettings
{
ContractResolver = ShouldSerializeContractResolver.Instance
};
var json = JsonConvert.SerializeObject(account, settings);
Console.WriteLine(json);
Luckily, Newtonsoft.Json has an override on the JsonConvert.SerializeObject() method that allows us to provide a type, so that the resulting JSON doesn't contain properties that don't exist in that type. 幸运的是, Newtonsoft.Json在JsonConvert.SerializeObject()方法上有一个重写,该重写使我们能够提供一种类型,以便生成的JSON不包含该类型中不存在的属性。 So, to eliminate properties, you can make a safe copy of your Account class with all the sensitive properties removed, and give it a different name:
因此,要消除属性,可以删除所有敏感属性的情况下对Account类进行安全复制,并为其指定其他名称:
public class AccountJSON
{
public string FullName { get; set; }
public string EmailAddress { get; set; }
}
Provide its type when serializing: 序列化时提供其类型:
var TheAccount = DBContext.Accounts.Find(1);
var TheJSON = Newtonsoft.Json.JsonConvert.SerializeObject(TheAccount, typeof(AccountJSON));
Note: This may only work on the first level deep when the serializer travels through the object. 注意:这可能仅在串行器穿过对象时才在第一层深处起作用。 If the Account object has lazy loading properties that reference even more Account objects, they may not use the "safe" type that you originally provided.
如果Account对象具有引用甚至更多Account对象的延迟加载属性,则它们可能不使用您最初提供的“安全”类型。
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