IMEX.mes.web/wwwroot/mes/mst/user/getPost.ashx

<%@ WebHandler Language="C#" Class="getPost" %>

using System;
using System.Web;
using System.Web.SessionState;
using System.Data;
using System.Text;
using System.Collections;
using System.Collections.Generic;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using Curtain.DataAccess;
using DK.XuWei.WebMes;

public class getPost : IHttpHandler, IReadOnlySessionState
{
    public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType = "text/plain";
        using(IDataAccess conn = DataAccess.Create())
        {
            DataTable dt = conn.ExecuteDatatable(@"
                SELECT 
                    POSTID AS id,
                    POSTCODE AS code,
                    POSTCODE || POSTNAME AS text
                FROM 
                    TP_MST_POST
                WHERE 
                    VALUEFLAG = '1'
                ORDER BY 
                    POSTCODE
            ");
            context.Response.Write(dt.ToJson());
        }

    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }

}