序列化，反序列化Json .net（转)

1.序列化Json使用JavaScriptSerializer类在命名空间System.Script.Serialization中
User user = new User {     Name = "TerryLee",    Age = 20};
JavaScriptSerializer serializer = new JavaScriptSerializer();
string result = serializer.Serialize(user);
反序列化
String input = "";
JavaScriptSerializer serializer = new JavaScriptSerializer();
serializer.Deserialize<User>(input);

2. 使用DataContractJsonSerializer类，推荐使用这个，这是最新的，位于命名空间System.Runtime.Serialization.Json下，序列化和反序列化分别调用它的WriteObject()和ReadObject()方法就可以了。


using System.Web.Script.Serialization;
/// <summary>
    /// Convert a object to a json string
    /// </summary>
    /// <param name="_obj"></param>
    /// <returns></returns>
    public static string ToJson(this object _obj)
    {
        var jss = new System.Web.Script.Serialization.JavaScriptSerializer();
        if (_obj != null)
            return jss.Serialize(_obj);
        return null;
    }
    /// <summary>
    /// Covnert a json format string into a object
    /// </summary>
    /// <returns></returns>
    public static T Eval<T>(this string _objJsonString)
    {
        var jss = new System.Web.Script.Serialization.JavaScriptSerializer();
        try
        {
            return jss.Deserialize<T>(_objJsonString);
        }
        catch
        {
            return default(T);
        }
    }