Asp.Net使用Json(.net3.5,C#)

.net FrameWork 3.5 内置了对JSON的支持，我们可以直接使用。
一。准备
首先引用：System.ServiceModel.Web.dll ,System.Runtime.Serialization.dll 。
然后在using里

using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;

二。编写需要序列化的类

using System.Runtime.Serialization;
namespace Dockty.Data
{
    [DataContract(Namespace = "http://www.dockty.com")]
    public class ArtTags
    {
        public ArtTags() { }
        [DataMember(Order = 0)]
        public int ID { get; set; }
        [DataMember(Order = 1)]
        public int TagID { get; set; }
        [DataMember(Order = 2)]
        public int ArtID { get; set; }
    }
}

定义好要序列化的对象和顺序。

三。JSON帮助类

using System.IO;
using System.Runtime.Serialization.Json;
using System.Text;

namespace Dockty.Data
{
    public static class JsonHelper<T>
    {
        static JsonHelper()
        { }

        /// <summary>
        /// 序列化为JSON对象
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string WriteObject(T obj)
        {
            var serializer = new DataContractJsonSerializer(typeof(T));
            var mstream = new MemoryStream();
            serializer.WriteObject(mstream, obj);
            byte[] Bytes = new byte[mstream.Length];
            mstream.Position = 0;
            mstream.Read(Bytes, 0, (int)mstream.Length);
            return Encoding.UTF8.GetString(Bytes);
        }

        /// <summary>
        /// JSON对象反序列化
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public static T ReadObject(string data)
        {
            var mstream = new MemoryStream(Encoding.UTF8.GetBytes(data));
            var serializer = new DataContractJsonSerializer(typeof(T));
            return (T)serializer.ReadObject(mstream);
        }
    }
}

四。序列化与反序列化

ArtTags tags = new ArtTags() { ArtID = 1, ID = 1, TagID = 1 };
//序列化
string strTags = JsonHelper<ArtTags>.WriteObject(tags);
//反序列化
ArtTags newTags = JsonHelper<ArtTags>.ReadObject(strTags);