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解決Asp.net Mvc返回JsonResult中DateTime類型數(shù)據(jù)格式問題的方法

 更新時間:2016年06月03日 10:42:31   作者:wangyan9110  
這篇文章主要介紹了解決Asp.net Mvc返回JsonResult中DateTime類型數(shù)據(jù)格式問題的方法,需要的朋友可以參考下

問題背景:

           在使用asp.net mvc 結(jié)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(shù)據(jù)在轉(zhuǎn)為字符串是它默認(rèn)轉(zhuǎn)為Date(84923838332223)的格式,在經(jīng)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(shù)據(jù)又不能對數(shù)據(jù)進(jìn)行攔截,進(jìn)行數(shù)據(jù)格式轉(zhuǎn)換之后再加載,后來發(fā)現(xiàn)可以通過自定義JsonResult實現(xiàn),認(rèn)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(dāng)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(yīng)該用過此方法吧

原來它也是使用這個方法進(jìn)行序列化的。我們就可以在這個地方先獲取到j(luò)son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(zhuǎn)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(dá)式的方式獲得Date(12347838383333)的字符串,然后把它轉(zhuǎn)換為DateTime類型,最后在轉(zhuǎn)為我們想要的格式即可,這個格式可以使用FormateStr屬性設(shè)置。

剩下的就是使用我們自己定義的JsonResult來替換asp.net mvc默認(rèn)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(shù)據(jù)</param>
    /// <param name="contentType">內(nèi)容類型</param>
    /// <param name="contentEncoding">內(nèi)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(shù)據(jù)</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(shù)據(jù)</param>
    /// <param name="format">數(shù)據(jù)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(diào)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(jù)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(shù)據(jù)格式問題的解決方法,希望對大家的學(xué)習(xí)有所幫助。

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