添加以扩展：
public class TextJsonConverExtension
{
public static void AddConverters(Microsoft.AspNetCore.Mvc.JsonOptions configure)
{
//添加支持string转int的操作
configure.JsonSerializerOptions.Converters.Add(new IntToStringConverter());
configure.JsonSerializerOptions.Converters.Add(new StringToStringConverter());
configure.JsonSerializerOptions.Converters.Add(new LongToStringConverter());
}
}
public class IntToStringConverter : JsonConverter<Int32>
{
public override Int32 Read(ref System.Text.Json.Utf8JsonReader reader, Type type, System.Text.Json.JsonSerializerOptions options)
{
if (reader.TokenType == System.Text.Json.JsonTokenType.String)
{
ReadOnlySpan<byte> span = reader.HasValueSequence ? reader.ValueSequence.ToArray() : reader.ValueSpan;
if (System.Buffers.Text.Utf8Parser.TryParse(span, out Int32 number, out int bytesConsumed) && span.Length == bytesConsumed)
return number;
if (Int32.TryParse(reader.GetString(), out number))
return number;
}
return reader.GetInt32();
}
public override void Write(Utf8JsonWriter writer, Int32 value, JsonSerializerOptions options)
{
writer.WriteStringValue(value.ToString());
}
}
public class StringToStringConverter : JsonConverter<String>
{
public override String Read(ref System.Text.Json.Utf8JsonReader reader, Type type, System.Text.Json.JsonSerializerOptions options)
{
if (reader.TokenType == System.Text.Json.JsonTokenType.String)
{
return reader.GetString();
}
else if(reader.TokenType == System.Text.Json.JsonTokenType.Number)
{
ReadOnlySpan<byte> span = reader.HasValueSequence ? reader.ValueSequence.ToArray() : reader.ValueSpan;
if (System.Buffers.Text.Utf8Parser.TryParse(span, out Int32 number, out int bytesConsumed) && span.Length == bytesConsumed)
return number.ToString();
if (Int32.TryParse(reader.GetString(), out number))
return number.ToString();
}
return null;
//return reader.GetInt32();
}
public override void Write(Utf8JsonWriter writer, String value, JsonSerializerOptions options)
{
writer.WriteStringValue(value.ToString());
}
}
public class LongToStringConverter : JsonConverter<long>
{
public override long Read(ref Utf8JsonReader reader, Type type, JsonSerializerOptions options)
{
if (reader.TokenType == JsonTokenType.String)
{
ReadOnlySpan<byte> span = reader.HasValueSequence ? reader.ValueSequence.ToArray() : reader.ValueSpan; if (Utf8Parser.TryParse(span, out long number, out int bytesConsumed) && span.Length == bytesConsumed) return number; if (Int64.TryParse(reader.GetString(), out number)) return number;
}
return reader.GetInt64();
}
public override void Write(Utf8JsonWriter writer, long value, JsonSerializerOptions options)
{
writer.WriteStringValue(value.ToString());
}
}使用：
services.AddMvc(options =>
{
}).AddJsonOptions(options =>
{
//添加json的扩展
TextJsonConverExtension.AddConverters(options);
//解决中文自动编码
options.JsonSerializerOptions.Encoder = JavaScriptEncoder.Create(UnicodeRanges.All);
});更多参考：https://github.com/dotnet/runtime/issues/30255
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