Json转换成DataTable

　　今天看到Json转DataTable的例子，总结一下。。。。

 using System;
 using System.Collections;
 using System.Collections.Generic;
 using System.Data;
 using System.IO;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Web;
 using System.Web.Script.Serialization;
 namespace Json转DT_List
 {
 
     class Program
     {
         static void Main(string[] args)
         {
             StreamReader sr = new StreamReader(@"F:\vs2015Test\VS2015学习\Json转DT，List\json1.json", Encoding.Default);
             var jsonStr = sr.ReadToEnd();
             var Dt = JsonToDatatable("");
             var str = DataTableToJson(new DataTable());
             Console.WriteLine(str);
 
             Console.ReadKey();
         }
 
         public static DataTable JsonToDatatable(string json)
         {
             DataTable datatable = null;
             if (!string.IsNullOrEmpty(json))
             {
                 JavaScriptSerializer jss = new JavaScriptSerializer();
                 ArrayList list = jss.Deserialize<ArrayList>(json);//将指定的 JSON 字符串转换为 T 类型的对象，可以是自己的List对象
                 datatable = new DataTable();
                 if (list.Count > )
                 {
                     foreach (Dictionary<string, object> ll in list)//定义一个.Dictionary盛放list中的对象
                     {
                         if (datatable.Columns.Count == )
                         {
                             foreach (var key in ll.Keys)
                                 datatable.Columns.Add(key, ll[key].GetType());   //添加新列
                         }
                         var newRow = datatable.NewRow();
                         foreach (var k in ll.Keys)
                         {
                             newRow[k] = ll[k];//给行上的列赋值
                         }
                         datatable.Rows.Add(newRow);
                     }
                 }
             }
             return datatable;
         }
 
         public static string DataTableToJson(DataTable dt)
         {
             var jsonStr = "";
             if (dt != null)
             {
                 ArrayList arrlist = new ArrayList();
                 JavaScriptSerializer jss = new JavaScriptSerializer();
                 foreach (DataRow row in dt.Rows)//遍历DataTable的Rows要是用DataRow
                 {
                     Dictionary<string, object> dicDrow = new Dictionary<string, object>();
                     foreach (DataColumn c in dt.Columns)//遍历DataTable的Columns要使用DataColumn
                         dicDrow.Add(c.ColumnName, row[c.ColumnName]);
                     arrlist.Add(dicDrow);
                 }
                 jsonStr = jss.Serialize(arrlist);
             }
             return jsonStr;
         }
     }
 }

该方法只能转换JSON数组格式的字符串，JSON对象格式只能转换成对象。。。。。

附带json1.json格式

[
  {
    "CFTUin": "",
    "CancelDeadline": "2013-09-12 23:00:00",
    "CheckInDate": "2013-09-12 00:00:00",
    "CheckOutDate": "2013-09-13 00:00:00",
    "CityID": "",
    "CurrencyCode": "RMB",
    "HotelID": "",
    "HotelName": "乐家连锁（北京天坛南门店）（原速8酒店（北京天坛南门店）",
    "ListID": "",
    "PayAmt": "",
    "PayType": "",
    "RommsCnt": "",
    "SPTransID": "",
    "State": ""
  },
  {
    "CFTUin": "",
    "CancelDeadline": "2013-10-13 23:00:00",
    "CheckInDate": "2013-10-13 00:00:00",
    "CheckOutDate": "2013-10-18 00:00:00",
    "CityID": "",
    "CurrencyCode": "RMB",
    "HotelID": "",
    "HotelName": "上海凯顿酒店",
    "ListID": "",
    "PayAmt": "",
    "PayType": "",
    "RommsCnt": "",
    "SPTransID": "",
    "State": ""
  }
]