Question

我知道如何使用自定义 Json Contract Resolver 重命名和删除属性，而且我知道如何使用自定义 Json Converter 添加属性。

如何在一次序列化中同时使用它们？

我试图同时使用它们创建JsonSerializerSettings，但是合同解析器被序列化忽略了：

var jsonSerializerSettings = new JsonSerializerSettings
{
    ContractResolver = GetCustomContractResolver(),
    Converters = new List<JsonConverter> { GetCustomJsonConverter() }
};

var json = JsonConvert.SerializeObject(myObject, Formatting.Indented, jsonSerializerSettings);

当我单独使用它们时，它们将按预期工作。

这是我的自定义转换器：

public class AddPropertiesJsonConverter : JsonConverter
{
    private readonly Dictionary<string, string> m_addedPropertiesDictionary;

    public AddPropertiesJsonConverter(Dictionary<string, string> addedPropertiesDictionary)
    {
        m_addedPropertiesDictionary = addedPropertiesDictionary;
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        var jObject = (JObject)JToken.FromObject(value);

        foreach (var keyValuePair in m_addedPropertiesDictionary)
        {
            jObject.AddFirst(new JProperty(keyValuePair.Key, keyValuePair.Value));
        }

        jObject.WriteTo(writer);
    }

    public override bool CanRead => false;

    public override bool CanConvert(Type objectType) => true;

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        throw new NotImplementedException();
    }
}

这是我的自定义合同解析器：

// Rename and delete properties
public class CustomContractResolver : DefaultContractResolver
{
    private readonly Dictionary<string, string> m_newSchemaDictionary;

    public CustomContractResolver(Dictionary<string, string> newSchemaDictionary)
    {
        m_newSchemaDictionary = newSchemaDictionary;
    }

    protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
    {
        var properties = base.CreateProperties(type, memberSerialization);

        // delete properties
        properties = properties.Where(p => m_newSchemaDictionary.ContainsKey(p.PropertyName)).ToList();

        // rename
        foreach (var property in properties)
        {
            property.PropertyName = m_newSchemaDictionary[property.PropertyName];
        }

        return properties;
    }
}

如何在C＃中的一个Json序列化中重命名，删除和添加属性？

0 个答案: