datatable转换为json

 /// 将datatable转换为json  
 3         /// </summary>
 4         /// <param name="dtb">Dt</param>
 5         /// <returns>JSON字符串</returns>
 6         public static string Dtb2Json(DataTable dtb)
 7         {
 8             JavaScriptSerializer jss = new JavaScriptSerializer();
 9             System.Collections.ArrayList dic = new System.Collections.ArrayList();
10             foreach (DataRow dr in dtb.Rows)
11             {
12                 System.Collections.Generic.Dictionary<string, object> drow = new System.Collections.Generic.Dictionary<string, object>();
13                 foreach (DataColumn dc in dtb.Columns)
14                 {
15                     drow.Add(dc.ColumnName, dr[dc.ColumnName]);
16                 }
17                 dic.Add(drow);
18 
19             }
20             //序列化  
21             return jss.Serialize(dic);
22         }