本文轉自：http://blog.163.com/luckcq@yeah/blog/static/17174770720121293437119/

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最近項目中前臺頁面使用EasyUI的jQuery插件開發中遇到，EasyUI Form中的Datebox組件綁定ASP.NET MVC返回的DateTime類型的數據錯誤，因為ASP.NET MVC返回的DateTime類型的JsonResult的結果中的值是"\/Date(277630788015)\/",于是EasyUI顯示的就是返回的值，沒有將日期轉換，直接顯示在DateBox組件中，解決這個問題其實有兩種辦法：

擴展EasyUI的datebox組件的parser函數自定義格式化日期格式，不過存在一個問題是如果使用form.load數據是先將值賦給datebox不會調用datebox的parser方法，只有在加載完form后再改變datebox的值為”2011-11-3”格式的值；

第二種方式就是本文要講得修改ASP.NET MVC的Json序列化方法，也就是修改JsonResult的序列化方法，下面就來詳細說下這種方法。

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首先看下ASP.NET MVC中的Controller的 Json方法的源碼：

??????? protected internal JsonResult Json(object data) {

??????????? return Json(data, null /* contentType */);

??????? }

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??????? protected internal JsonResult Json(object data, string contentType) {

??????????? return Json(data, contentType, null /* contentEncoding */);

??????? }

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??????? protected internal virtual JsonResult Json(object data, string contentType, Encoding contentEncoding) {

??????????? return new JsonResult {

??????????????? Data = data,

??????????????? ContentType = contentType,

??????????????? ContentEncoding = contentEncoding

??????????? };

??????? }

可以看出關鍵還是在JsonResult這個結果類中，JsonResult類的源碼如下：

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??? [AspNetHostingPermission(System.Security.Permissions.SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]

??? [AspNetHostingPermission(System.Security.Permissions.SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]

??? public class JsonResult : ActionResult {

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??????? public Encoding ContentEncoding {

??????????? get;

??????????? set;

??????? }

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??????? public string ContentType {

??????????? get;

??????????? set;

??????? }

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??????? public object Data {

??????????? get;

??????????? set;

??????? }

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??????? public override void ExecuteResult(ControllerContext context) {

??????????? if (context == null) {

??????????????? throw new ArgumentNullException("context");

??????????? }

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??????????? HttpResponseBase response = context.HttpContext.Response;

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??????????? if (!String.IsNullOrEmpty(ContentType)) {

??????????????? response.ContentType = ContentType;

??????????? }

??????????? else {

??????????????? response.ContentType = "application/json";

??????????? }

??????????? if (ContentEncoding != null) {

??????????????? response.ContentEncoding = ContentEncoding;

??????????? }

??????????? if (Data != null) {

#pragma warning disable 0618

??????????????? JavaScriptSerializer serializer = new JavaScriptSerializer();

??????????????? response.Write(serializer.Serialize(Data));

#pragma warning restore 0618

??????????? }

??????? }

??? }

}

看到這里大家應該明確我們的修改目標了，對，就是ExecuteResult這個方法，這個方法是序列化Data對象為Json格式的，可見ASP.NET MVC 使用的是System.Web.Script.Serialization.JavaScriptSerializer類

既然明確了目標，那么就開始動手吧。

1. 擴展JsonResult類自定義個CustomJsonResult類，重寫ExecuteResult方法代碼如下：

??? public class CustomJsonResult:JsonResult

??? {

??????? public override void ExecuteResult(ControllerContext context)

??????? {

??????????? if (context == null)

??????????? {

??????????????? throw new ArgumentNullException("context");

??????????? }

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??????????? HttpResponseBase response = context.HttpContext.Response;

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??????????? if (!String.IsNullOrEmpty(ContentType))

??????????? {

??????????????? response.ContentType = ContentType;

??????????? }

??????????? else

??????????? {

??????????????? response.ContentType = "application/json";

??????????? }

??????????? if (ContentEncoding != null)

??????????? {

??????????????? response.ContentEncoding = ContentEncoding;

??????????? }

??????????? if (Data != null)

??????????? {

#pragma warning disable 0618

??????????????

??????????????? response.Write(JsonConvert.SerializeObject(Data));

#pragma warning restore 0618

??????????? }

??????? }

我們使用的是Newtonsoft.Json.JsonConvert類序列化對象為Json的，具體集中.NET中的序列化對比可以參考文章：在.NET使用JSON作為數據交換格式

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擴展Controller重寫Json方法，代碼如下：

??? public class BaseController:Controller

??? {

??????? protected override JsonResult Json(object data, string contentType, Encoding contentEncoding)

??????? {

??????????? return new CustomJsonResult

??? ????????{

??????????????? Data = data,

??????????????? ContentType = contentType,

??????????????? ContentEncoding = contentEncoding

??????????? };

??????? }

}

下面就是我們實際使用方法了，因為Newtonsoft.Json.JsonConvert類DateTime類型可以指定序列化日期的類型為： [JsonConverter(typeof(IsoDateTimeConverter))]， [JsonConverter(typeof(JavaScriptDateTimeConverter))]

[JsonConverter(typeof(IsoDateTimeConverter))]序列化后的格式為：1981-03-16T00:20:12.1875+08:00

[JsonConverter(typeof(JavaScriptDateTimeConverter))]序列化后的格式為：new?Date(-277630787812)

于是我們指定實體類的DateTime屬性為IsoDateTimeConverter，代碼如下：

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?????? [Field("P_Date", "更新日期")]

?????? [JsonConverter(typeof(IsoDateTimeConverter))]

?????? public DateTime P_Date { get; set; }

控制器繼承自BaseController，Action的返回結果還是JsonResult格式，代碼如下：

??? public class GoodsController:BaseController

{

??????? public JsonResult List(string page, string rows)

??????? {

??????????? Page thepage = new Page() { PageSize = 20, CurrentPage = 1 };

??????????? if (!String.IsNullOrEmpty(rows))

??????????? {

??????????????? thepage.PageSize = Convert.ToInt32(rows);

??????????? }

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??????????? if (!String.IsNullOrEmpty(page))

??????????? {

??????????????? thepage.CurrentPage = Convert.ToInt32(page);

??????????? }

??????????? Dictionary<string, object> result = new Dictionary<string, object>();

??????????? result.Add("rows", new BusinessLogic().SelectByPage<GoodsList>(ref thepage));

??????????? result.Add("total", thepage.SumCount);

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??????????? return Json(result);

??????? }

}

轉載于:https://www.cnblogs.com/freeliver54/p/4383676.html

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