Json 与 后台对象的相互转化

<p><textarea cols="50" rows="15" name="code" class="c-sharp">    public class Common
    {
        /// &lt;summary&gt;
        /// 解析json对象为C#对象
        /// &lt;/summary&gt;
        /// &lt;typeparam name="T"&gt;&lt;/typeparam&gt;
        /// &lt;param name="json"&gt;&lt;/param&gt;
        /// &lt;returns&gt;&lt;/returns&gt;
        public static T JsonToObj&lt;T&gt;(string json)
        {
            DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
            T obj;
            using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json)))
            {
                obj = (T)ser.ReadObject(ms);
            }
            return obj;
        }
        /// &lt;summary&gt;
        /// 将对象转换为json
        /// &lt;/summary&gt;
        /// &lt;param name="obj"&gt;&lt;/param&gt;
        /// &lt;returns&gt;&lt;/returns&gt;
        public static string ObjToJson(object obj)
        {
            DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
            using (MemoryStream ms = new MemoryStream())
            {
                serializer.WriteObject(ms, obj);
                StringBuilder sb = new StringBuilder();
                sb.Append(Encoding.UTF8.GetString(ms.ToArray()));
                return sb.ToString();
            }
        }
    }
    public static class JSONExtension
    {
        public static string ToJSON(this object obj)
        {
            DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
            using (MemoryStream ms = new MemoryStream())
            {
                serializer.WriteObject(ms, obj);
                return Encoding.Default.GetString(ms.ToArray());
            }
        }
        public static T ParseJSON&lt;T&gt;(this string str)
        {
            T obj = Activator.CreateInstance&lt;T&gt;();
            using (MemoryStream ms = new MemoryStream(Encoding.Unicode.GetBytes(str)))
            {
                DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
                return (T)serializer.ReadObject(ms);
            }
        }
    } 
</textarea></p>
<p>Common与JSONExtension均可以实现</p>