WebApi 返回小驼峰式 json 格式，并格式化日期

在 WebApiConfig 类中增加方法ConfigureApi，并在 Register 方法最后调用一下 ConfigureApi(config);

增加一个实现IContentNegotiator 接口的类 JsonContentNegotiator

详细如下：

public static void ConfigureApi(HttpConfiguration config)

{

var jsonFormatter = new JsonMediaTypeFormatter();

var settings = jsonFormatter.SerializerSettings;

IsoDateTimeConverter timeConverter = new IsoDateTimeConverter();

//这里使用自定义日期格式

timeConverter.DateTimeFormat = "yyyy'-'MM'-'dd' 'HH':'mm':'ss";

settings.Converters.Add(timeConverter);

settings.ContractResolver = new CamelCasePropertyNamesContractResolver();

config.Services.Replace(typeof(IContentNegotiator), new JsonContentNegotiator(jsonFormatter));

}

public class JsonContentNegotiator : IContentNegotiator

{

private readonly JsonMediaTypeFormatter _jsonFormatter;

public JsonContentNegotiator(JsonMediaTypeFormatter formatter)

{

_jsonFormatter = formatter;

}

public ContentNegotiationResult Negotiate(Type type, HttpRequestMessage request, IEnumerable<MediaTypeFormatter> formatters)

{

var result = new ContentNegotiationResult(_jsonFormatter, new MediaTypeHeaderValue("application/json"));

return result;

}

}