json.cs

一种.net实现ajax方法的类库

/** Copyright (c) 2006, All-In-One Creations, Ltd.
*  All rights reserved.
* 
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
* 
*     * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
*     * Neither the name of All-In-One Creations, Ltd. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
* 
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**/
/**
 * Project: emergetk: stateful web framework for the masses
 * File name: .cs
 * Description:
 *   
 * Author: Ben Joldersma
 *   
 */
using System;
using System.Collections.Generic;
using System.Text;
using EmergeTk.Model;

namespace EmergeTk
{
    public class JSON
    {
        public enum Type
        {
            Array,
            Object
        }

        public static string ArrayToJSON<T>(List<T> list)
        {
            return "[" + Util.Join(list) + "]";
        }

        public static string HashToJSON(Dictionary<string, string> source)
        {
            if (source == null) return null;
            List<string> items = new List<string>();
            foreach (string key in source.Keys)
            {
               items.Add(string.Format("{0}:{1}", key, source[key]));
            }
            return "{" + Util.Join(items) + "}";
        }

        public static Dictionary<string, string> JSONToHash(string source)
        {
            source = source.Trim(new char[] { '{', '}' });
            string[] pairs = source.Split(',');
            Dictionary<string,string> ret = new Dictionary<string,string>();
            foreach( string pair in pairs )
            {
                string[] tuple = pair.Split(':');
                ret[tuple[0]] = tuple[1];
            }
            return ret;
        }

        static public string PrepareValueForJSON(object value)
        {
            if (value == null) return null;
            if (value is string ||
                value is DateTime ||
                value is Enum ||
                value is AbstractRecord)
            {
                if (value is DateTime)
                    value = ((DateTime)value).ToShortDateString();
                return "'" + Util.FormatForClient(value.ToString()) + "'";
            }
            else
                return value.ToString();
        }
    }
}