利用反射，自动将对象生成json字符串【反射应用的一个小DEMO】

先贴代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Reflection;

namespace CodeCenterCore.Refelect
{
    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
    public class ToJSONAtrribute : Attribute
    {
        public ToJSONAtrribute()
        {
        }
    }

    public static class ExensionJSON
    {
        public static string ToJSONList<T>(this IEnumerable<T> source)
        {
            string returnValue = "";
            StringBuilder sb = new StringBuilder();
            sb.Append("[");
            foreach (T item in source)
            {
                sb.Append(item.ToJSON() + ",");
            }
            sb.Append("]");
            returnValue = sb.ToString();
            returnValue = Regex.Replace(returnValue, @",]", "]");
            return returnValue;
        }

        public static string ToJSON<T>(this T source)
        {
            string returnValue = "";
            StringBuilder sb = new StringBuilder();
            sb.Append("{");
            Type typeInfo = source.GetType(); 
            PropertyInfo[] properties = typeInfo.GetProperties();
            foreach (PropertyInfo property in properties)
            {
                object[] attrs = property.GetCustomAttributes(typeof(ToJSONAtrribute), false);
                if (attrs.Length > 0)
                    sb.Append(string.Format("\"{0}\":\"{1}\",", property.Name, property.GetValue(source, null)));

            }
            sb.Append("}");
            returnValue = sb.ToString();
            returnValue = Regex.Replace(returnValue, @",}", "}");
            return returnValue;
        }
    }
}