我在.Net Core中有两个类
班级 Ownership
namespace CustomStoreDatabase.Models
{
public class Ownership
{
public string OwnershipId { get; set; }
public List<string> TextOutput { get; set; }
public DateTime DateTime { get; set; }
public TimeSpan MeanInterval { get; set; }// Like long ticks, TimeSpan.FromTicks(Int64), TimeSpan.Ticks
}
}
我需要表现出MeanInterval
像长蜱,使用方法TimeSpan.FromTicks(Int64)
和TimeSpan.Ticks
。
我的自定义JsonConverter
using CustomStoreDatabase.Models;
using System;
using System.Text.Json;
using System.Text.Json.Serialization;
namespace CustomStoreDatabase.Util
{
public class OwnershipJSonConverter : JsonConverter<Ownership>
{
public override bool CanConvert(Type typeToConvert)
{
return true;
}
public override Ownership Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
if (reader.TokenType != JsonTokenType.StartObject)
{
throw new JsonException();
}
//*******************
// HOW TO IMPLEMENT?
//*******************
//throw new NotImplementedException();
}
public override void Write(Utf8JsonWriter writer, Ownership value, JsonSerializerOptions options)
{
writer.WriteStartObject();
if (value != null)
{
writer.WriteString("OwnershipId", value.OwnershipId);
writer.WriteString("TextOutput", JsonSerializer.Serialize(value.TextOutput));
writer.WriteString("DateTime", JsonSerializer.Serialize(value.DateTime));
if (value.MeanInterval != null)
{
writer.WriteNumber("MeanInterval", (long)value.MeanInterval.Ticks);
}
else
{
writer.WriteNull("MeanInterval");
}
}
writer.WriteEndObject();
}
}
}
我不知道如何实现该Read
方法。如何实现覆盖Read方法的自定义反序列化?
如果有可能你们向我建议另一个CanConvert
方法实现,我非常感谢您。
好像你只需要执行自定义序列化TimeSpan
,因为它属于Ownership
,那么为什么不使一个转换器TimeSpan
仅保存自己从手动序列化的所有其他类的属性?:
public class TimeSpanConverter : JsonConverter<TimeSpan>
{
public override TimeSpan Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
return TimeSpan.FromTicks(reader.GetInt64());
}
public override void Write(Utf8JsonWriter writer, TimeSpan value, JsonSerializerOptions options)
{
writer.WriteNumberValue(value.Ticks);
}
}
然后MeanInterval
用来装饰您的财产JsonConverterAttribute
:
public class Ownership
{
public string OwnershipId { get; set; }
public List<string> TextOutput { get; set; }
public DateTime DateTime { get; set; }
[JsonConverter(typeof(TimeSpanConverter))]
public TimeSpan MeanInterval { get; set; }// Like long ticks, TimeSpan.FromTicks(Int64), TimeSpan.Ticks
}
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