using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;

namespace CnasSynchronousCommon
{
    public class TransConvert
    {
        /// <summary>
        /// datatable传Json
        /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static string DataTableToJSON(DataTable dt)
       {
              StringBuilder jsonBuilder = new StringBuilder();
              jsonBuilder.Append("[");
              for (int i = 0; i<dt.Rows.Count; i++)
              {
                  jsonBuilder.Append("{");
                  for (int j = 0; j<dt.Columns.Count; j++)
                  {
                     jsonBuilder.Append("\"");
                     jsonBuilder.Append(dt.Columns[j].ColumnName);
                     jsonBuilder.Append("\":\"");
                     jsonBuilder.Append(dt.Rows[i][j].ToString());
                     jsonBuilder.Append("\",");
                 }
                 jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
                 jsonBuilder.Append("},");
             }
             jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
             jsonBuilder.Append("]");
             return jsonBuilder.ToString();
        }

        /// <summary>
        /// List<DataRow>转Json
        /// </summary>
        /// <param name="lst"></param>
        /// <returns></returns>
        public static string ListToString(List<DataRow> lst)
        {
            return JsonConvert.SerializeObject(lst);
        }

        /// <summary>
        /// json传List<DataRow>
        /// </summary>
        /// <param name="strList"></param>
        /// <returns></returns>
        public static List<DataRow> StringToList(string strList)
        {
            return JsonConvert.DeserializeObject<List<DataRow>>(strList);
        }
    }
}