只返回数据表的部分字段（不建类）

最简单的是：

var vresult= result.Select(u => new { ID = u.id, Guid = u.Guid.Trim(), addTime = u.addTime });　　//这是LINQ，而SqlSuger里面不支持这样写

或：

var result = db.Queryable<t_user>().Where(u => u.CompanyId == comid && u.Isdel == false).OrderBy(u => u.addTime, OrderByType.Desc).ToPageList(page + 1, 3); //先全部查出来，然后再用 tuple
List<Tuple<int, DateTime?>> list = new List<Tuple<int, DateTime?>>();
foreach (t_user u in result)
{
　　list.Add(new Tuple<int, DateTime?>(u.id,u.addTime));
}

或：

List<Dictionary<string, Object>> list = new List<Dictionary<string, object>>();
Dictionary<string, Object> dic = null;
foreach (t_user u in result)
{
　　dic = new Dictionary<string, object>();
　　dic.Add("id", u.id);
　　dic.Add("Guid", u.Guid.Trim());
　　dic.Add("addTime", u.addTime);
　　list.Add(dic);
}

 context.Response.Write(jhelper.ObjToJson(new { status = 200, msg = "查看成功", items = list, nextpage = page + 1 }));

using Newtonsoft.Json;
using System;
using System.IO;

namespace MyWeb
{
    public class JsonHelper
    {

        /// <summary>
        /// json传输函数
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public string ObjToJson(Object obj)
        {
            StringWriter sw;
            JsonSerializer serializer = new JsonSerializer();
            sw = new StringWriter();
            serializer.Serialize(new JsonTextWriter(sw), obj);
            return sw.GetStringBuilder().ToString();
        }
    }
}