using System;
using System.Collections.Generic;
using System.Data;
using System.Text;

namespace Terra.YaoGan.Common
{
   public static class DataTableToJson
    {

        public static  string DtToJson(DataTable  dt)
        {
            if (dt.Rows.Count == 0)
            {
                return "";
            }else
            {
                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();
            }       
        }





    }
}