49 lines
1.6 KiB
C#
49 lines
1.6 KiB
C#
using System;
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using System.Buffers;
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using System.Linq;
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using System.Text;
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using System.Text.Json;
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namespace Infrastructure.Converter
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{
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/// <summary>
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/// Json任何类型读取到字符串属性
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/// 因为 System.Text.Json 必须严格遵守类型一致，当非字符串读取到字符属性时报错：
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/// The JSON value could not be converted to System.String.
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/// </summary>
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public class StringConverter : System.Text.Json.Serialization.JsonConverter<string>
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{
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public override string Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
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{
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if (reader.TokenType == JsonTokenType.String)
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{
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return reader.GetString();
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}
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else
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{
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//非字符类型，返回原生内容
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return GetRawPropertyValue(reader);
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}
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throw new JsonException();
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}
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public override void Write(Utf8JsonWriter writer, string value, JsonSerializerOptions options)
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{
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writer.WriteStringValue(value);
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}
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/// <summary>
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/// 非字符类型，返回原生内容
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/// </summary>
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/// <param name="jsonReader"></param>
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/// <returns></returns>
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private static string GetRawPropertyValue(Utf8JsonReader jsonReader)
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{
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ReadOnlySpan<byte> utf8Bytes = jsonReader.HasValueSequence ?
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jsonReader.ValueSequence.ToArray() :
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jsonReader.ValueSpan;
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return Encoding.UTF8.GetString(utf8Bytes);
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}
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}
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}
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