Mikel
之前一直用ASP.NET MVC中Json(value)方法转换成JsonResult格式的数据异步返回给JQuery进行处理，很爽，结果最近不用
ASP.NET MVC开发应用了，异步地区调用涉及到Json数据的获取发现居然没有好的Json格式数据转换方法像过去一样简单调用
很是不爽，搜了下找到个利用System.Runtime.Serialization.Json转换数据的方法，可以转换为JQuery可以识别的格式，不过
调用过程中发现它将实体类的属性名称转换成:”<属性名>k__BackingField ”
这种格式，调用起来很不方便，不过还是将这种方法编写的助手类贴出来：
注意需要引用：
首先，当然是项目是3.5的，
只引用一个System.Runtime.Serialization 是不够的，
还要添加 System.ServiceModel
System.ServiceModel.Web
的引用，OK
前转载的文章中提到了
代码如下：
/// <summary>/// FileName: JSONHelper.cs/// CLRVersion: 2.0.50727.3623/// Author: Mikel/// Corporation:/// Description:JSON格式数据转换助手类/// 1.将List<T>类型的数据转换为JSON格式/// 2.将T类型对象转换为JSON格式对象/// 3.将JSON格式对象转换为T类型对象/// DateTime: 2011-09-13 14:11:34/// </summary>public static class JSONHelper{ /// <summary> /// 转换对象为JSON格式数据 /// </summary> /// <typeparam name="T">类</typeparam> /// <param name="obj">对象</param> /// <returns>字符格式的JSON数据</returns> public static string GetJSON<T>(object obj) { string result = String.Empty; try { System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T)); using (System.IO.MemoryStream ms = new System.IO.MemoryStream()) { serializer.WriteObject(ms, obj); result = System.Text.Encoding.UTF8.GetString(ms.ToArray()); } } catch (Exception ex) { throw ex; } return result; } /// <summary> /// 转换List<T>的数据为JSON格式 /// </summary> /// <typeparam name="T">类</typeparam> /// <param name="vals">列表值</param> /// <returns>JSON格式数据</returns> public static string JSON<T>(List<T> vals) { System.Text.StringBuilder st = new System.Text.StringBuilder(); try { System.Runtime.Serialization.Json.DataContractJsonSerializer s = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T)); foreach (T city in vals) { using (System.IO.MemoryStream ms = new System.IO.MemoryStream()) { s.WriteObject(ms, city); st.Append(System.Text.Encoding.UTF8.GetString(ms.ToArray())); } } } catch (Exception ex) { throw ex; } return st.ToString(); } /// <summary> /// JSON格式字符转换为T类型的对象 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="jsonStr"></param> /// <returns></returns> public static T ParseFormByJson<T>(string jsonStr) { T obj = Activator.CreateInstance<T>(); using (System.IO.MemoryStream ms = new System.IO.MemoryStream(System.Text.Encoding.UTF8.GetBytes(jsonStr))) { System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(T)); return (T)serializer.ReadObject(ms); } }} |
还是觉得ASP.NET MVC的Json转换比较地道，于是翻找其源码，发现是利用的.net Framework 3.5特有的
c:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Web.Extensions.dll
实现的Json数据格式转换，实现代码如下：
namespace System.Web.Mvc { using System; using System.Text; using System.Web; using System.Web.Script.Serialization; [AspNetHostingPermission(System.Security.Permissions.SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermission(System.Security.Permissions.SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)] public class JsonResult : ActionResult { public Encoding ContentEncoding { get; set; } public string ContentType { get; set; } public object Data { get; set; } public override void ExecuteResult(ControllerContext context) { if (context == null) { throw new ArgumentNullException("context"); } HttpResponseBase response = context.HttpContext.Response; 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 } } }} |
看到这大家应该明白了，原来.net Framework3.5已经做好了转换的方法，只需要调用即可，不过提醒大家注意：
一定要先引用c:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\System.Web.Extensions.dll
才能使用JavaScriptSerializer serializer = new JavaScriptSerializer();
切记！切记！
