Json.NET日期序列化的時區問題

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using Newtonsoft.Json;

namespace ConsoleApplication1

{

    class Program

    {

        static void Main(string[] args)

        {

            //使用預設序列化參數

            Console.WriteLine("* Default JsonSerializerSettings");

            Console.WriteLine("DateTime.Now => {0}",

                JsonConvert.SerializeObject(DateTime.Now));

            Console.WriteLine("DateTime.UtcNow => {0}",

                JsonConvert.SerializeObject(DateTime.UtcNow));

            //序列化時傳入JsonSerializerSettings指定時區原則

            var js = new JsonSerializerSettings()

            {

                DateTimeZoneHandling = DateTimeZoneHandling.Utc

            };

            Console.WriteLine("* DateTimeZoneHandling.Utc");

            Console.WriteLine("DateTime.Now => {0}",

                JsonConvert.SerializeObject(DateTime.Now, js));

            Console.WriteLine("DateTime.UtcNow => {0}",

                JsonConvert.SerializeObject(DateTime.UtcNow, js));

            //可設成預設值

            Console.WriteLine("* Set DefaultSettings");

            JsonConvert.DefaultSettings = () => new JsonSerializerSettings()

            {

                DateTimeZoneHandling = DateTimeZoneHandling.Utc

            };

            Console.WriteLine("DateTime.Now => {0}",

                JsonConvert.SerializeObject(DateTime.Now));

            Console.WriteLine("DateTime.UtcNow => {0}",

                JsonConvert.SerializeObject(DateTime.UtcNow));

            Console.Read();

        }

    }

}

* Default JsonSerializerSettings
DateTime.Now => "2013-10-03T17:48:42.2826841+08:00"
DateTime.UtcNow => "2013-10-03T09:48:42.504104Z"
* DateTimeZoneHandling.Utc
DateTime.Now => "2013-10-03T09:48:42.5081116Z"
DateTime.UtcNow => "2013-10-03T09:48:42.5181306Z"
* Set DefaultSettings
DateTime.Now => "2013-10-03T09:48:42.5191325Z"
DateTime.UtcNow => "2013-10-03T09:48:42.5201344Z"

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Net.Http;

using System.Web.Http;

namespace MyWeb.Controllers

{

    public class DateTestController : ApiController

    {

        public class Result

        {

            public DateTime Now { get; set; }

            public DateTime UtcNow { get; set; }

            public Result()

            {

                Now = DateTime.Now;

                UtcNow = DateTime.UtcNow;

            }

        }

        [HttpPost]

        public Result Get() 

        {

            return new Result();

        }

    }

}

    public static class WebApiConfig

    {

        public static void Register(HttpConfiguration config)

        {

            config.Formatters.JsonFormatter.SerializerSettings.DateTimeZoneHandling

                = Newtonsoft.Json.DateTimeZoneHandling.Utc;

            config.Routes.MapHttpRoute(

                name: "DefaultApi",

                routeTemplate: "api/{controller}/{id}",

                defaults: new { id = RouteParameter.Optional }

            );

//...以下省略...

# jack said on 11 November, 2013 12:55 AM

我使用了JavaScriptDateTimeConverter这个转换器，最后转换后的日期格式为2013-11-11T08-08-11 如何去掉这个日期中的T呢？

# Jeffrey said on 11 November, 2013 04:18 AM

to jack, 是在SerializeObject()將.NET DateTime轉為JSON時遇到這個問題嗎? 應是DateTime物件被設為DateTimeKind.Unspecified導致，試試用DateTime.ToUniversalTime()將日期轉為UTC時間。

# jack said on 15 November, 2013 12:43 AM

在web api中  所有的controller的返回值都为actionresult类型，我自定义了一个jsonresult类型继承自actionresult，里面用了json.net的JsonSerializer，converters用的是JavaScriptDateTimeConverter，前端用的是EXT，这样收到的时间格式为2013-11-11T08-08-11，中间带了个T，应该怎么处理？

# jack said on 15 November, 2013 01:54 AM

我是将所有的controller的返回值类型都特意弄成actionresult类型了，能否将所有的web api下的对外公开的服务提取一个统一的类型么？

# Jeffrey said on 16 November, 2013 07:54 AM

to jack, 2013-11-11T08-08-11是Json.NET轉換DateTimeKind.Unspecified(未指定時區類別)的DateTime所產生的ISO8601格式字串，你所謂的處理是指要將其轉成JavaScript端的Date型別嗎? 若是，可利用Reviver(參考: blog2.darkthread.net/post-2013-05-11-json-parse-iso8601.aspx)，因結尾沒有Z，預設Reviver邏輯無法轉換，你可以調整Reviver函式因應。但我習慣的解法是在Server端先將日期格式利用.ToUniversalTime()轉成UTC時間再交給Json.NET，如此轉出的格式會變成2013-11-11T08-08-11Z，就能順利在JavaScript用標準日期Reviver轉成Date了。

# nightingale said on 30 December, 2014 09:59 PM

我的想法比較簡單

仔細想想

為什麼會要用 Null 或 DateTime.MinValue 呢

因為通常都是拿來判斷，當User沒輸入日期時候!

要做什麼事情

所以直接在後面.Date就好了ar :P

(tmpClass.SDate.Date == DateTime.MinValue.Date) ?

# 曾永裕 said on 02 August, 2016 04:25 AM

typo: 故會包留時區資訊

# Jeffrey said on 02 August, 2016 08:20 PM

to 曾永裕，感謝指正～

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