/* 创建者：菜刀居士的博客
 * 创建日期: 2014年09月03号
 * 功能： Json操作
 *
 */

namespace Net.String.ConsoleApplication
{
    using System;
    using System.Data;
    using System.Collections;
    using System.ComponentModel;
    using System.Collections.Generic;
    using System.Web.Script.Serialization;
  

    public class JsonHelper
    {
        /// <summary>
        /// 把json字符串转成对象
        /// </summary>
        /// <typeparam name="T">对象</typeparam>
        /// <param name="data">json字符串</param>
        public static T Deserialize<T>(string data)
        {
            System.Web.Script.Serialization.JavaScriptSerializer json = new System.Web.Script.Serialization.JavaScriptSerializer();
            return json.Deserialize<T>(data);
        }

        /// <summary>
        /// 把对象转成json字符串
        /// </summary>
        /// <param name="o">对象</param>
        /// <returns>json字符串</returns>
        public static string Serialize(object o)
        {
            System.Text.StringBuilder sb = new System.Text.StringBuilder();
            System.Web.Script.Serialization.JavaScriptSerializer json = new System.Web.Script.Serialization.JavaScriptSerializer();
            json.Serialize(o, sb);
            return sb.ToString();
        }

        /// <summary>
        /// 把DataTable对象转成json字符串
        /// </summary>
        public string ToJson(DataTable dt)
        {
            JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
            ArrayList arrayList = new ArrayList();
            foreach (DataRow dataRow in dt.Rows)
            {
                Dictionary<string, object> dictionary = new Dictionary<string, object>();
                foreach (DataColumn dataColumn in dt.Columns)
                {
                    dictionary.Add(dataColumn.ColumnName, dataRow[dataColumn.ColumnName]);
                }
                arrayList.Add(dictionary);
            }
            return javaScriptSerializer.Serialize(arrayList);
        }
    }

    public static class EnumerableExtension
    {
        /// <summary>
        /// 集合添加一个对象
        /// </summary>
        public static IEnumerable<T> Add<T>(this IEnumerable<T> e, T value)
        {
            foreach (var cur in e)
            { yield return cur; }
            yield return value;
        }

        /// <summary>
        /// 把集合转成DataTable
        /// </summary>
        public static DataTable ConvertToDataTable<T>(this IEnumerable<T> enumerable)
        {
            var dataTable = new DataTable();
            foreach (PropertyDescriptor pd in TypeDescriptor.GetProperties(typeof(T)))
            {
                dataTable.Columns.Add(pd.Name, pd.PropertyType);
            }
            foreach (T item in enumerable)
            {
                var Row = dataTable.NewRow();

                foreach (PropertyDescriptor dp in TypeDescriptor.GetProperties(typeof(T)))
                {
                    Row[dp.Name] = dp.GetValue(item);
                }
                dataTable.Rows.Add(Row);
            }
            return dataTable;
        }
    }
}

C#对象转json字符串和json字符串转对象