idictionaryconverter.cs

来自「AJAX开发工具包」· CS 代码 · 共 107 行

/*
 * MS   05-12-21    added Deserialize for Hashtables
 *                  JavaScript object will now include the type for key and value
 * 
 * 
 * 
 */
using System;
using System.Reflection;
using System.Text;
using System.Collections;
using System.Collections.Specialized;

namespace AjaxPro
{
	/// <summary>
	/// Provides methods to serialize and deserialize an object that implements IDictionary.
	/// </summary>
	public class IDictionaryConverter : IJavaScriptConverter
	{
		public IDictionaryConverter() : base()
		{
		}

        public override object Deserialize(IJavaScriptObject o, Type t)
        {
            if (!(o is JavaScriptArray))
                throw new NotSupportedException();

            JavaScriptArray a = (JavaScriptArray)o;

            for (int i = 0; i < a.Count; i++)
                if (!(a[i] is JavaScriptArray))
                    throw new NotSupportedException();

            IDictionary d = (IDictionary)Activator.CreateInstance(t);

            object key;
            object value;
            JavaScriptArray aa;

            for (int i = 0; i < a.Count; i++)
            {
                aa = (JavaScriptArray)a[i];
                key = JavaScriptDeserializer.Deserialize((IJavaScriptObject)aa[0], Type.GetType(((JavaScriptString)aa[2]).ToString()));
                value = JavaScriptDeserializer.Deserialize((IJavaScriptObject)aa[1], Type.GetType(((JavaScriptString)aa[3]).ToString()));

                d.Add(key, value);
            }

            return d;
        }

		public override string Serialize(object o)
		{
			if(!(o is IDictionary))
				throw new NotSupportedException();

			StringBuilder sb = new StringBuilder();

			IDictionary dic = (IDictionary)o;
			IDictionaryEnumerator enumerable = dic.GetEnumerator();

			enumerable.Reset();
			bool b = true;

			sb.Append("[");
			
			while(enumerable.MoveNext())
			{
				if(b){ b = false; }
				else{ sb.Append(","); }

                sb.Append('[');
				sb.Append(JavaScriptSerializer.Serialize(enumerable.Key));
				sb.Append(',');
				sb.Append(JavaScriptSerializer.Serialize(enumerable.Value));
                sb.Append(',');
                sb.Append(JavaScriptSerializer.SerializeString(enumerable.Key.GetType().FullName));
                sb.Append(',');
                sb.Append(JavaScriptSerializer.SerializeString(enumerable.Value.GetType().FullName));
                sb.Append(']');
			}

			sb.Append("]");

			return sb.ToString();
		}

        public override Type[] DeserializableTypes
        {
            get
            {
                return new Type[] { typeof(Hashtable) };
            }
        }

		public override Type[] SerializableTypes
		{
			get
			{
				return new Type[]{typeof(IDictionary), typeof(Hashtable)};
			}
		}
	}
}