問題背景：
在使用asp.net mvc 結合jquery esayui做一個系統(tǒng)，但是在使用使用this.json方法直接返回一個json對象，在列表中顯示時發(fā)現(xiàn)datetime類型的數據在轉為字符串是它默認轉為Date(84923838332223)的格式，在經過查資料發(fā)現(xiàn)使用前端來解決這個問題的方法不少，但是我又發(fā)現(xiàn)在使用jquery easyui時，加載列表數據又不能對數據進行攔截，進行數據格式轉換之后再加載，后來發(fā)現(xiàn)可以通過自定義JsonResult實現(xiàn)，認為這種方法比較可行，就開始研究
我們先來看看jsonResult的源碼
public class JsonResult : ActionResult { public JsonResult() { this.JsonRequestBehavior = System.Web.Mvc.JsonRequestBehavior.DenyGet; } public override void ExecuteResult(ControllerContext context) { if (context == null) { throw new ArgumentNullException("context"); } if ((this.JsonRequestBehavior == System.Web.Mvc.JsonRequestBehavior.DenyGet) && string.Equals(context.HttpContext.Request.HttpMethod, "GET", StringComparison.OrdinalIgnoreCase)) { throw new InvalidOperationException(MvcResources.JsonRequest_GetNotAllowed); } HttpResponseBase response = context.HttpContext.Response; if (!string.IsNullOrEmpty(this.ContentType)) { response.ContentType = this.ContentType; } else { response.ContentType = "application/json"; } if (this.ContentEncoding != null) { response.ContentEncoding = this.ContentEncoding; } if (this.Data != null) { JavaScriptSerializer serializer = new JavaScriptSerializer(); response.Write(serializer.Serialize(this.Data)); } } public Encoding ContentEncoding { get; set; } public string ContentType { get; set; } public object Data { get; set; } public System.Web.Mvc.JsonRequestBehavior JsonRequestBehavior { get; set; } }} 當我看到上面代碼中的紅色部分，我感到有些熟悉，心里比較高興，以前使用過ashx來傳json的都應該用過此方法吧
原來它也是使用這個方法進行序列化的。我們就可以在這個地方先獲取到json序列化之后的字符串！然后做寫“小動作”，就ok了
下面我就定義了一個自己的JsonResult了
/// <summary> /// 自定義Json視圖 /// </summary> public class CustomJsonResult:JsonResult { /// <summary> /// 格式化字符串 /// </summary> public string FormateStr { get; set; } /// <summary> /// 重寫執(zhí)行視圖 /// </summary> /// <param name="context">上下文</param> public override void ExecuteResult(ControllerContext context) { if (context == null) { throw new ArgumentNullException("context"); } HttpResponseBase response = context.HttpContext.Response; if (string.IsNullOrEmpty(this.ContentType)) { response.ContentType = this.ContentType; } else { response.ContentType = "application/json"; } if (this.ContentEncoding != null) { response.ContentEncoding = this.ContentEncoding; } if (this.Data != null) { JavaScriptSerializer jss = new JavaScriptSerializer(); string jsonString = jss.Serialize(Data); string p = @"///Date/((/d+)/)///"; MatchEvaluator matchEvaluator = new MatchEvaluator(this.ConvertJsonDateToDateString); Regex reg = new Regex(p); jsonString = reg.Replace(jsonString, matchEvaluator); response.Write(jsonString); } } /// <summary> /// 將Json序列化的時間由/Date(1294499956278)轉為字符串 . /// </summary> /// <param name="m">正則匹配</param> /// <returns>格式化后的字符串</returns> private string ConvertJsonDateToDateString(Match m) { string result = string.Empty; DateTime dt = new DateTime(1970, 1, 1); dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value)); dt = dt.ToLocalTime(); result = dt.ToString(FormateStr); return result; } }
在這里做的“小動作”就是紅色部分，得到字符串以后，通過正則表達式的方式獲得Date(12347838383333)的字符串，然后把它轉換為DateTime類型，最后在轉為我們想要的格式即可，這個格式可以使用FormateStr屬性設置。
剩下的就是使用我們自己定義的JsonResult來替換asp.net mvc默認的JsonResult的問題了，接著從源碼中找答案，下面是Controller類的部分代碼
protected internal JsonResult Json(object data) { return this.Json(data, null, null, JsonRequestBehavior.DenyGet); } protected internal JsonResult Json(object data, string contentType) { return this.Json(data, contentType, null, JsonRequestBehavior.DenyGet); } protected internal JsonResult Json(object data, JsonRequestBehavior behavior) { return this.Json(data, null, null, behavior); } protected internal virtual JsonResult Json(object data, string contentType, Encoding contentEncoding) { return this.Json(data, contentType, contentEncoding, JsonRequestBehavior.DenyGet); } protected internal JsonResult Json(object data, string contentType, JsonRequestBehavior behavior) { return this.Json(data, contentType, null, behavior); } protected internal virtual JsonResult Json(object data, string contentType, Encoding contentEncoding, JsonRequestBehavior behavior) { return new JsonResult { Data = data, ContentType = contentType, ContentEncoding = contentEncoding, JsonRequestBehavior = behavior }; } 以上是Controller類來實例化JsonResult的所有代碼。我們只需寫一個BaseController類，重寫最后一個方法即可，然后我們自己的Controller在繼承BaseController即可
下面是BaseController類的部分代碼，我們?yōu)榉奖阕约簜€性化的需要又定義了兩個MyJosn的方法
/// <summary> /// 返回JsonResult /// </summary> /// <param name="data">數據</param> /// <param name="contentType">內容類型</param> /// <param name="contentEncoding">內容編碼</param> /// <param name="behavior">行為</param> /// <returns>JsonReuslt</returns> protected override JsonResult Json(object data, string contentType, System.Text.Encoding contentEncoding, JsonRequestBehavior behavior) { return new CustomJsonResult { Data = data, ContentType = contentType, ContentEncoding =contentEncoding, JsonRequestBehavior = behavior, FormateStr = "yyyy-MM-dd HH:mm:ss" }; } /// <summary> /// 返回JsonResult.24 /// </summary> /// <param name="data">數據</param> /// <param name="behavior">行為</param> /// <param name="format">json中dateTime類型的格式</param> /// <returns>Json</returns> protected JsonResult MyJson(object data, JsonRequestBehavior behavior,string format) { return new CustomJsonResult { Data = data, JsonRequestBehavior = behavior, FormateStr = format }; } /// <summary> /// 返回JsonResult42 /// </summary> /// <param name="data">數據</param> /// <param name="format">數據格式</param> /// <returns>Json</returns> protected JsonResult MyJson(object data, string format) { return new CustomJsonResult { Data = data, FormateStr = format }; } 最后我們在自己的Controller中調用即可
public class ProjectMileStoneController : BaseController { /// <summary> /// 首頁視圖 /// </summary> /// <returns>視圖</returns> public ActionResult Index() { return this.View(); } #region 項目里程碑查詢 /// <summary> /// 根據項目編號獲取項目里程碑 /// </summary> /// <param name="projectId">項目編號</param> /// <returns>項目里程碑</returns> public JsonResult GetProjectMileStoneByProjectId(int projectId) { IList<ProjectMileStone> projectMileStones = FacadeContainer.Get<IProjectMileStoneService>().GetProjectMileStonesByProjectId(projectId); return this.MyJson(projectMileStones, "yyyy.MM.dd"); } #endregion } 原文地址：http://www.cnblogs.com/JerryWang1991
以上就是Asp.net Mvc返回JsonResult中DateTime類型數據格式問題的解決方法，希望對大家的學習有所幫助。
