是的,可以使用自定义的ContractResolver
来实现这个功能。
由于您没有展示任何代码,所以我来举个例子。假设我有一个类Foo
如下所示。我希望在序列化输出中包含Id
和Name
属性,但我绝对不会关心AlternateName
和Color
,因此我使用了[JsonIgnore]
标记它们。我希望描述信息出现,但有时它可能会很长,因此我使用了自定义的JsonConverter
来限制其长度。我还想为描述信息使用较短的属性名称,因此我用[JsonProperty("Desc")]
标记了它。
class Foo
{
public int Id { get; set; }
public string Name { get; set; }
[JsonIgnore]
public string AlternateName { get; set; }
[JsonProperty("Desc")]
[JsonConverter(typeof(StringTruncatingConverter))]
public string Description { get; set; }
[JsonIgnore]
public string Color { get; set; }
}
当我对上述实例进行序列化时...
Foo foo = new Foo
{
Id = 1,
Name = "Thing 1",
AlternateName = "The First Thing",
Description = "This is some lengthy text describing Thing 1 which you'll no doubt find very interesting and useful.",
Color = "Yellow"
};
string json = JsonConvert.SerializeObject(foo, Formatting.Indented);
...我得到了这个输出:
{
"Id": 1,
"Name": "Thing 1",
"Desc": "This is some lengthy text describing Thing 1 "
}
现在,假设有时我想要获取完整的JSON输出,而不考虑我的自定义设置。我可以使用自定义 ContractResolver
来以编程方式 "取消应用" 类中的属性。以下是解析器的代码:
class IgnoreJsonAttributesResolver : DefaultContractResolver
{
protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
{
IList<JsonProperty> props = base.CreateProperties(type, memberSerialization);
foreach (var prop in props)
{
prop.Ignored = false;
prop.Converter = null;
prop.PropertyName = prop.UnderlyingName;
}
return props;
}
}
为了使用解析器,我将其添加到
JsonSerializerSettings
中,并像这样将设置传递给序列化程序:
JsonSerializerSettings settings = new JsonSerializerSettings()
settings.ContractResolver = new IgnoreJsonAttributesResolver()
settings.Formatting = Formatting.Indented
string json = JsonConvert.SerializeObject(foo, settings)
输出现在包括被忽略的属性,并且说明不再被截断。
{
"Id": 1,
"Name": "Thing 1",
"AlternateName": "The First Thing",
"Description": "This is some lengthy text describing Thing 1 which you'll no doubt find very interesting and useful.",
"Color": "Yellow"
}
完整演示在此处: https://dotnetfiddle.net/WZpeWt
prop.PropertyName = prop.UnderlyingName;
,这会使属性使用它的原始名称。 - Brian Rogers