C# 自定义ASP.NET Web API输出

如何自定义ASP.NET Web API的序列化输出

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比方说，我希望所有值都是大写。

您可以访问JSON.NET序列化程序设置。使用JSON.NET，您可以使用转换器覆盖转换，例如

您还可以通过从抽象JsonConverter继承来实现自己的。有关详细信息，请参阅

对于您的示例，创建转换器：

public class UpperCaseStringConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return objectType == typeof(string);
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        return reader.Value.ToString();
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        var outputValue = value as string;
        writer.WriteValue(outputValue == null ? null : outputValue.ToUpper());
    }
}

[JsonConverter(typeof(UpperCaseStringConverter))]

然后要全局注册此配置，请添加此配置：

public class UpperCaseStringConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return objectType == typeof(string);
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        return reader.Value.ToString();
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        var outputValue = value as string;
        writer.WriteValue(outputValue == null ? null : outputValue.ToUpper());
    }
}

[JsonConverter(typeof(UpperCaseStringConverter))]

来自的注册示例

要添加到模型上的单个属性，只需添加注释：

public class UpperCaseStringConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return objectType == typeof(string);
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        return reader.Value.ToString();
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        var outputValue = value as string;
        writer.WriteValue(outputValue == null ? null : outputValue.ToUpper());
    }
}

[JsonConverter(typeof(UpperCaseStringConverter))]

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完美答案。谢谢你！