/// <summary> 
 /// 酒店評(píng)論列表-分頁(yè) 
/// </summary> 
/// <param name="userId"></param> 
/// <param name="pageIndex">當(dāng)前頁(yè)</param> 
/// <param name="pageCount">總頁(yè)數(shù)</param> 
/// <returns></returns> 
 public static List<CommentInfo> GetHotelCommentList(int userId, int pageIndex, out int pageCount) 
 { 
     var list = new List<CommentInfo>(); 
     pageCount = 0; 
     try 
     { 
         //查詢酒店ID,名字,圖片,用戶ID,用戶評(píng)論 
         string sql = string.Format( @"select hotels.hid,hotels.hotelName,hotels.images,hotelorder.UserID,user_HotelComment.comment from hotels with(nolock) join hotelorder with(nolock) join user_HotelComment  
telorder.UserID=user_HotelComment.userID on hotels.hid=hotelorder.HotelID where hotelorder.UserID={0}", userId); 
         DataTable dt = SQLHelper.Get_DataTable(sql, SQLHelper.GetCon(), null); 
         if (dt != null && dt.Rows.Count > 0) 
         { 
             list = (from p in dt.AsEnumerable()  //這個(gè)list是查出全部的用戶評(píng)論 
                     select new CommentInfo 
                     { 
                         Id = p.Field<int>("hid"), //p.Filed<int>("Id") 其實(shí)就是獲取DataRow中ID列。即：row["ID"] 
                         HotelImages = p.Field<string>("images"), 
                         HotelName = p.Field<string>("hotelName"), 
                         Comment = p.Field<string>("comment") 
                     }).ToList(); //將這個(gè)集合轉(zhuǎn)換成list 
             int pageSize = 10; //每頁(yè)顯示十條數(shù)據(jù) 
 
             //獲取總頁(yè)數(shù) 
             pageCount = list.Count % pageSize == 0 ? ((list.Count - pageSize >= 0 ? (list.Count / pageSize) : (list.Count == 0 ? 0 : 1))) : list.Count / pageSize + 1; 
 
             //這個(gè)list 就是取到10條數(shù)據(jù) 
             //Skip跳過(guò)序列中指定數(shù)量的元素，然后返回剩余的元素。 
             //Take序列的開(kāi)頭返回指定數(shù)量的連續(xù)元素。 
             list = list.Skip(pageSize * (pageIndex - 1)).Take(pageSize).ToList(); //假設(shè)當(dāng)前頁(yè)為第三頁(yè)。這么這里就是跳過(guò) 10*(3-1) 即跳過(guò)20條數(shù)據(jù)，Take(pageSize)的意思是:取10條數(shù)據(jù),既然前面已經(jīng)跳過(guò)前20條數(shù)據(jù)了，那么這里就是從21條開(kāi)始，取10條咯 
         } 
     } 
     catch (Exception ex) 
     { 
         // write log here 
     } 
     return list; 
}

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
 
namespace WebApplication1 
{ 
    /// <summary> 
    /// 用戶信息 
    /// </summary> 
    public class User 
    { 
        public int Id { get; set; } 
 
        public string UserName { get; set; } 
 
        public int Age { get; set; } 
 
        public int Gender { get; set; } 
    } 
}

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using JSON.Controllers; 
using System.Data; 
 
namespace WebApplication1 
{ 
    public class Class1 
    { 
        /// <summary> 
        /// 將DataTable轉(zhuǎn)換成一個(gè)list 
        /// </summary> 
        /// <returns>返回一個(gè)List<User>對(duì)象</returns> 
        public List<User> TableToList() 
        { 
            string sql = "select  * from T_User"; //T_User表里總共有 id,UserName,Age,Gender四列 
            DataTable dt= SqlHelper.ExecuteDataTable(sql,null); 
            var list = new List<User>(); //創(chuàng)建一個(gè)List<User>的實(shí)例 
            if (dt != null && dt.Rows.Count > 0) 
            { 
                //AsEnumerable()：返回一個(gè)IEnumerable<T> 對(duì)象，其泛型參數(shù) T 為 System.Data.DataRow。 
                list = (from p in dt.AsEnumerable() 
                        select new User  //new一個(gè)User對(duì)象 
                        { 
                            Id = p.Field<int>("id"),//p.Filed<int>("id") 其實(shí)就是獲取DataRow中ID列。即：row["ID"] 然后將它賦值給User類(lèi)的Id字段。 
                            UserName = p.Field<string>("UserName"), 
                            Age = p.Field<int>("Age"), 
                            Gender = p.Field<int>("Gender") 
                        }).ToList(); //將這個(gè)User類(lèi)對(duì)象轉(zhuǎn)換成list 
            } 
            int dataCount = list.Count; // 總的數(shù)據(jù)條數(shù)。 
            int pageSize=10;//每頁(yè)顯示多少條數(shù)據(jù)。             
            int pageCount; //總頁(yè)數(shù)。 
            int currentPage=3;//當(dāng)前頁(yè)。--這里假設(shè)當(dāng)前頁(yè)為第3頁(yè)。 
            pageCount = dataCount % pageSize == 0 ? (dataCount < pageSize ? (dataCount==0?0:1): (dataCount / pageSize)) : (dataCount / pageSize + 1); 

     //這個(gè)list 就是取到10條數(shù)據(jù)   
            //Skip跳過(guò)序列中指定數(shù)量的元素，然后返回剩余的元素。   
            //Take序列的開(kāi)頭返回指定數(shù)量的連續(xù)元素。   
            list = list.Skip(pageSize * (currentPage - 1)).Take(pageSize).ToList(); //假設(shè)當(dāng)前頁(yè)為第3頁(yè)。這么這里就是跳過(guò) 10*(3-1) 即跳過(guò)20條數(shù)據(jù)，Take(pageSize)的意思是:取10條數(shù)據(jù),既然前面已經(jīng)跳過(guò)前20條數(shù)據(jù)了，那么這里就是從21條開(kāi)始，取10條咯   
            return list;  
        }         
    } 
}