Silverlight - 使用 Serializer 來實現 Clone 的功能.

在 Silverlight 中並不包括 ICloneable Interface 來實現複製的功能，故如需要複製的功能就需使用 Serializer 來實現了，此部份是使用 Json Serizlizer 來實作此部份.

首先 Model 需加上 DataContract / DataMember Attribute的部份.

    [DataContract]
    public class Circle
    {
        [DataMember]
        public double Radius { set; get; }

        [DataMember]
        public double Shrink { set; get; }

        public Circle()
        {
            Radius = 150;
        }

其次使用下面的 Class 來達到 Serialize / Deserialize.

    public static class JsonSerializer
    {
        public static string Serialize<T>(T obj)
        {
            string jsonString = string.Empty;

            using (MemoryStream ms = new MemoryStream())
            {
                DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
                serializer.WriteObject(ms, obj);
                ms.Position = 0; 
                
                using (StreamReader reader = new StreamReader(ms)) { 
                    jsonString = reader.ReadToEnd(); 
                }
            }

            return jsonString;
        }

        public static T DeSerialize<T>(string jsonString)
        {
            using (MemoryStream ms = new MemoryStream(System.Text.Encoding.Unicode.GetBytes(jsonString))) {
                DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T)); 
                return (T)serializer.ReadObject(ms); 
            }
        }
    }

最後在其 Model 上加入 Clone Member 就可以實現複製的功能.

public Circle Clone()
{
    return JsonSerializer.DeSerialize<Circle>(JsonSerializer.Serialize<Circle>(this));
}