JSON 转成 C# 动态类

任意 JSON 转成 C# 动态类,无需事先声明一个C#类型，实现json字符串转成dynamic 类

示例:

class Program
    {
        staticvoid Main(string[] args)
        {
            string json ="{name:'hooyes',pwd:'hooyespwd',books:{a:'红楼梦',b:'水浒传',c:{arr:['宝玉','林黛玉']}},arr:['good','very good']}";

            dynamic dy = ConvertJson(json);

            Console.WriteLine(dy.name);

            Console.WriteLine(dy.books.a);

            Console.WriteLine(dy.arr[1]);

            foreach (var s in dy.books.c.arr)
            {
                Console.WriteLine(s);
            }

            Console.Read();

        }
        static dynamic ConvertJson(string json)
        {
            JavaScriptSerializer jss =new JavaScriptSerializer();
            jss.RegisterConverters(new JavaScriptConverter[] { new DynamicJsonConverter() });
            dynamic dy = jss.Deserialize(json, typeof(object)) as dynamic;
            return dy;
        }
    }

用到两个自定义的类:DynamicJsonConverter,DynamicJsonObject

publicclass DynamicJsonConverter : JavaScriptConverter
    {
        publicoverrideobject Deserialize(IDictionary<string, object> dictionary, Type type, JavaScriptSerializer serializer)
        {
            if (dictionary ==null)
                thrownew ArgumentNullException("dictionary");

            if (type ==typeof(object))
            {
                returnnew DynamicJsonObject(dictionary);
            }

            returnnull;
        }

        publicoverride IDictionary<string, object> Serialize(object obj, JavaScriptSerializer serializer)
        {
            thrownew NotImplementedException();
        }

        publicoverride IEnumerable<Type> SupportedTypes
        {
            get { returnnew ReadOnlyCollection<Type>(new List<Type>(new Type[] { typeof(object) })); }
        }
    }

publicclass DynamicJsonObject : DynamicObject
    {
        private IDictionary<string, object> Dictionary { get; set; }

        public DynamicJsonObject(IDictionary<string, object> dictionary)
        {
            this.Dictionary = dictionary;
        }

        publicoverridebool TryGetMember(GetMemberBinder binder, outobject result)
        {
            result =this.Dictionary[binder.Name];

            if (result is IDictionary<string, object>)
            {
                result =new DynamicJsonObject(result as IDictionary<string, object>);
            }
            elseif (result is ArrayList && (result as ArrayList) is IDictionary<string, object>)
            {
                result =new List<DynamicJsonObject>((result as ArrayList).ToArray().Select(x =>new DynamicJsonObject(x as IDictionary<string, object>)));
            }
            elseif (result is ArrayList)
            {
                result =new List<object>((result as ArrayList).ToArray());
            }

            returnthis.Dictionary.ContainsKey(binder.Name);
        }
    }