更新-2016年9月:

Json.NET 9.0.1有 SnakeCaseNamingStrategy . 您可以使用它自动拥有twitter屏幕名称样式属性。

继承自 DefaultContractResolver 和覆盖 ResolvePropertyName 设置属性名称的格式。

CamelCasePropertyNamesContractResolver 对属性名执行类似的全局更改。

请阅读: http://nyqui.st/json-net-newtonsoft-json-lowercase-keys

public class UnderscoreMappingResolver : DefaultContractResolver 
    {
        protected override string ResolvePropertyName(string propertyName)
        {
            return System.Text.RegularExpressions.Regex.Replace(
                propertyName, @"([A-Z])([A-Z][a-z])|([a-z0-9])([A-Z])", "$1$3_$2$4").ToLower(); 
        }
    }

从版本9开始,存在一个新的命名策略属性来执行此操作,并且它有一个内置的 SnakeCaseNamingStrategy 上课。使用下面的代码并注册 contractResolver SerializerSettings.ContractResolver .

var contractResolver = new DefaultContractResolver();
contractResolver.NamingStrategy = new SnakeCaseNamingStrategy();

默认情况下,该类不包含字典,并且不重写任何手动设置的属性值。这是可以在重载中传递的两个参数:

// true parameter forces handling of dictionaries
// false prevents the serializer from changing anything manually set by an attribute
contractResolver.NamingStrategy = new SnakeCaseNamingStrategy(true, false);

这个对我有用

var settings = new JsonSerializerSettings
{
    ContractResolver = new PascalCaseToUnderscoreContractResolver()
};
var rawJson = "{ test_property:'test' }"
var myObject = JsonConvert.DeserializeObject<MyObjectType>(rawJson, settings);

使用人性化函数“下划线”

https://www.nuget.org/packages/Humanizer/1.37.7

http://humanizr.net/#underscore

public class PascalCaseToUnderscoreContractResolver : DefaultContractResolver
{
    protected override string ResolvePropertyName(string propertyName) => propertyName.Underscore();
}

MyObjectType类

public Class MyObjectType
{
    public string TestProperty {get;set;}
}