C# redis缓存分页

前言：我是借鉴别人的“redis缓存分页”的思路进行实现的，下面是代码实现部分（在我的博客中有一篇“转载”就是写的思路实现部分的，大家可以借鉴一下）

  /// 

        /// 得到分页数据
        /// 说明：使用了redis缓存分页
        /// 
        /// 
        /// 
        public Page.pa_ForumMain getPageData(int pageNo)
        {
            string userNum = "2091928133";

            //string userNum = HttpContext.Current.Session["UNumber"].ToString();

            Page.pa_ForumMain forumMain = new Page.pa_ForumMain();
            forumMain.pageNo = pageNo;//当前页
            forumMain.pageSize = (int)nf_ForumMain.PageNum;//每页显示条数
            forumMain.pageCountByParameter = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(new DAL.DAL_nf_ForumMain().getPageCount(userNum, forumMain.pageSize, forumMain.pageNo) + .0000)));//获得总页数【有一个三元表达式：防止用户没有博文抛异常】
            forumMain.pageCount = new BLL_nf_ForumMain().getDataCount(userNum);

            if (forumMain.pageCountByParameter < 0)//判断用户请求页数是否有数据
                return new Page.pa_ForumMain() { pageCountByParameter = 0 };

            using (var client = RedisManager.GetClient())//判断redis中的ZSet集合里面是否存在数据
            {
                if (client.GetSortedSetCount(userNum + "userBlogsZSet") == 0)//如果“ZSet集合”里面没有数据，但是数据库里面有
                   new VO.vo_redis_nf_ForumMain().getInitUserBlogsIdByRedisToZSet(userNum, forumMain);
            };//using end

            //如果“ZSet集合”存在数据
            using (var client = RedisManager.GetClient())
            {
                //如果redis的ZSet里面存在数据，则查看Hash集合里面时候存在“指定区间”的数据。【存在就返回，不存在就先去数据库里面找。两个判断都要判断过期时间】
                if (client.GetSortedSetCount(userNum + "userBlogsZSet") != 0)//如果“ZSet集合里面存在数据”，就获取指定区间内的
                {
                    List<string> strlins = new VO.vo_redis_nf_ForumMain().getRedisBlogsIdByZSet(userNum, forumMain);//将“ZSet集合指定区间内的数据暂时存储到泛型集合里面”
                   
                    if (strlins.Count > 0)//如果“ZSet集合”的数据存在，“Hash集合里面又没有数据”，就不进行“Hash过期时间的判断”
                    {
                        foreach (string item in strlins)
                        {                         
                            if (client.GetHashCount(item) == 0)//如果“ZSet集合”的数据存在，并且指定“Hash集合里面不存在数据”，就增加指定区间内的数据
                            {
                                if (new VO.vo_redis_nf_ForumMain().getInitUserBlogsIdByRedisToHash(userNum, strlins) == true)
                                    return new Page.pa_ForumMain() {pageNo= forumMain.pageNo, pageSize= forumMain.pageSize, pageCount=forumMain.pageCount, pageCountByParameter = forumMain.pageCountByParameter, forumMains= new VO.vo_redis_nf_ForumMain().getgetInitUserBlogsIdByRedisToHashValues(userNum,strlins) };
                            }
                            if (client.GetHashCount(item) != 0)//如果“ZSet集合存在数据”，指定“Hash集合”里面也存在数据，就进行“Hash过期时间”的判断
                            {
                                DateTime time = Convert.ToDateTime(client.GetItemFromList(userNum + "userBlogsDatasTimeByRedisHash", 0));
                                if (time == DateTime.Now.AddDays(30))//如果现在时间和过期时间一样，就删除“Hash集合”过期时间
                                {
                                    client.Remove(item);//删除指定的“Hash集合”群【这里的】
                                }//if end
                                if (time != DateTime.Now.AddDays(30))//如果现在时间和过期时间不一样(Hash集合里面存在数据)，将Hash集合指定区间内的数据取出来
                                {
                                    if (new VO.vo_redis_nf_ForumMain().getInitUserBlogsIdByRedisToHash(userNum, strlins) == true)
                                        return new Page.pa_ForumMain() { pageNo = forumMain.pageNo, pageSize = forumMain.pageSize, pageCount = forumMain.pageCount, pageCountByParameter = forumMain.pageCountByParameter, forumMains = new VO.vo_redis_nf_ForumMain().getgetInitUserBlogsIdByRedisToHashValues(userNum, strlins) };
                                }
                            }//if end
                        }//foreach end
                    }//if end
                }//if end              
            };//using end      

            //如果出错，就直接返回“-1”
            return new Page.pa_ForumMain() { pageNo=-1};
        }//function end

 /// 

        /// 获得数据库中，所有的用户博文Id并存储进“ZSet集合”
        /// 
        /// 布尔类型
        public bool getInitUserBlogsIdByRedisToZSet(string userNum, Page.pa_ForumMain forumMain=null)
        {
            DAL.DAL_nf_ForumMain forumMai = new DAL.DAL_nf_ForumMain();

            try
            {
                //从数据库中查找数据
                List<Model.nf_ForumMain> dataList = forumMai.getUserBlogsByTime(userNum);
                using (var client = RedisManager.GetClient())
                {
                    long Bignumber = 0;
                    foreach (Model.nf_ForumMain item in dataList)
                    {
                        Bignumber += 1;
                        client.AddItemToSortedSet(userNum + "userBlogsZSet", item.FMId, Bignumber);
                    }//foreach end
                    client.AddItemToList(userNum + "userBlogsZSetFirstCount", client.GetSortedSetCount(userNum + "userBlogsZSet").ToString());//存储第一次用户博文的总数
                    client.AddItemToList(userNum + "userBlogsZSetSecondCount", client.GetSortedSetCount(userNum + "userBlogsZSet").ToString());//除第一次外，用户的博文总数
                }//using end
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
        }//function end

 /// 

        /// 通过“第一个参数”和“第二个参数”获得ZSet集合区间内的博文Id，并进行返回
        /// pageNo、pageSize
        /// 
        /// 
        public List<string> getRedisBlogsIdByZSet(string userNum, Page.pa_ForumMain forumMain)
        {
            List<string> strlins = new List<string>();
            using (var client = RedisManager.GetClient())
            {
                IDictionary<string, double> pairs = client.GetRangeWithScoresFromSortedSet(userNum + "userBlogsZSet", (forumMain.pageSize * (forumMain.pageNo - 1) + 1), (forumMain.pageSize * forumMain.pageNo));//得到ZSet区间内的
                for (int i = 0; i < pairs.Count; i++)
                    strlins.Add(pairs.ElementAt(i).Key);
            }//using end

            return strlins;
        }//function end

 /// 
y
        /// 将博文具体数据存储进Hash集合里面
        /// 
        /// 
        /// 
        /// 
        /// 
        public bool getInitUserBlogsIdByRedisToHash(string userNum, List<string> strlins)
        {
            DAL.DAL_nf_ForumMain forumMain = new DAL_nf_ForumMain();
            try
            {
                using (var client = RedisManager.GetClient())
                {
                    foreach (string item in strlins)
                    {
                        Model.nf_ForumMain main = forumMain.getObject(item, userNum);

                        //17个对象字段为一个hash集群，hashId为该对象的Id
                        client.SetEntryInHash(main.FMId, "FMId", main.FMId);//帖子编号
                        client.SetEntryInHash(main.FMId, "FMTitle", main.FMTitle);//帖子标题
                        client.SetEntryInHash(main.FMId, "FMArea", main.FMArea.ToString());//区域编号
                        client.SetEntryInHash(main.FMId, "FMClassify", main.FMClassify.ToString());//分类编号
                        client.SetEntryInHash(main.FMId, "LId", main.LId);//标签编号
                        client.SetEntryInHash(main.FMId, "messager", main.messager);//发帖人编号
                        client.SetEntryInHash(main.FMId, "FMTime", main.FMTime.ToString());//发帖时间
                        client.SetEntryInHash(main.FMId, "FMContent", main.FMContent);//帖子内容
                        client.SetEntryInHash(main.FMId, "FBodyContent", main.FBodyContent);//纯文本内容
                        client.SetEntryInHash(main.FMId, "FImagesUrl", main.FImagesUrl);//图片路径
                        client.SetEntryInHash(main.FMId, "FMNumber", main.FMNumber.ToString());//点赞数量
                        client.SetEntryInHash(main.FMId, "FMViewCount", main.FMViewCount.ToString());//浏览次数
                        //求价值：
                        int number = new DAL.DAL_nf_ForumSecond().getCommentCount(main.FMId).Count();
                        string price = Math.Ceiling(Convert.ToDecimal(((long.Parse(client.GetValueFromHash(main.FMId, "FMNumber")) * 2) +//点赞数量
                            long.Parse(client.GetValueFromHash(main.FMId, "FMViewCount")) +//浏览数量
                            (number * 3)) / 3.0)).ToString();//评论数量[从后台拿到]
                        client.SetEntryInHash(main.FMId, "jiazhi", price);//【价值数量=浏览分数+点赞分数+评论分数】
                        client.SetEntryInHash(main.FMId, "Commentary", number.ToString());//评论数量
                        client.SetEntryInHash(main.FMId, "FMRecommend", main.FMRecommend.ToString());//是否推荐
                        client.SetEntryInHash(main.FMId, "FMExamine", main.FMExamine.ToString());//是否审查
                        client.SetEntryInHash(main.FMId, "IsDelete", main.IsDelete.ToString());//是否删除
                    }//foreach end
                    client.AddItemToList(userNum + "userBlogsDatasTimeByRedisHash", DateTime.Now.AddDays(30).ToString());//获得Hash集合过期时间
                    client.AddItemToList(userNum + "userBlogsImportDataTimeByRedisHash", DateTime.Now.AddDays(5).ToString());//获得“点赞、评论、浏览”的过期时间
                }//using end
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }//catch end

        }//function end

/// 

        /// 在“Hash集合”中得到指定区间的数据
        /// 
        /// 获得某ZSet集合区间内的用户博文Id
        /// 
        public List<Model.nf_ForumMain> getgetInitUserBlogsIdByRedisToHashValues(string userNum, List<string> strlins)
        {
            List<Model.nf_ForumMain> forumMains = new List<Model.nf_ForumMain>();
            try
            {
                using (var client = RedisManager.GetClient())
                {
                    foreach (string item in strlins)
                    {
                        //如果“ZSet有值，Hash里面没有值。就通过博文Id到数据库里面寻找”
                        if (!client.HashContainsEntry(item, "FMArea") && !client.HashContainsEntry(item, "FMClassify") && !client.HashContainsEntry(item, "FMNumber") && !client.HashContainsEntry(item, "FMViewCount") && !client.HashContainsEntry(item, "jiazhi") && !client.HashContainsEntry(item, "Commentary") && !client.HashContainsEntry(item, "FMRecommend") && !client.HashContainsEntry(item, "FMExamine") && !client.HashContainsEntry(item, "IsDelete"))
                        {
                            Model.nf_ForumMain main = new DAL.DAL_nf_ForumMain().getObject(item, userNum);

                            client.SetEntryInHash(main.FMId, "FMId", main.FMId);//帖子编号
                            client.SetEntryInHash(main.FMId, "FMTitle", main.FMTitle);//帖子标题
                            client.SetEntryInHash(main.FMId, "FMArea", main.FMArea.ToString());//区域编号
                            client.SetEntryInHash(main.FMId, "FMClassify", main.FMClassify.ToString());//分类编号
                            client.SetEntryInHash(main.FMId, "LId", main.LId);//标签编号
                            client.SetEntryInHash(main.FMId, "messager", main.messager);//发帖人编号
                            client.SetEntryInHash(main.FMId, "FMTime", main.FMTime.ToString());//发帖时间
                            client.SetEntryInHash(main.FMId, "FMContent", main.FMContent);//帖子内容
                            client.SetEntryInHash(main.FMId, "FBodyContent", main.FBodyContent);//纯文本内容
                            client.SetEntryInHash(main.FMId, "FImagesUrl", main.FImagesUrl);//图片路径
                            client.SetEntryInHash(main.FMId, "FMNumber", main.FMNumber.ToString());//点赞数量
                            client.SetEntryInHash(main.FMId, "FMViewCount", main.FMViewCount.ToString());//浏览次数
                            client.SetEntryInHash(main.FMId, "jiazhi", Convert.ToString(0));//价值

                            int number = new DAL.DAL_nf_ForumSecond().getCommentCount(main.FMId).Count();

                            client.SetEntryInHash(main.FMId, "Commentary", number.ToString());//评论次数
                            client.SetEntryInHash(main.FMId, "BlogsFirstPageByPlusSign", Convert.ToString(0));//加号
                            client.SetEntryInHash(main.FMId, "BlogsFirstPageByMinusSign", Convert.ToString(0));//减号
                            client.SetEntryInHash(main.FMId, "FMRecommend", main.FMRecommend.ToString());//是否推荐
                            client.SetEntryInHash(main.FMId, "FMExamine", main.FMExamine.ToString());//是否审查
                            client.SetEntryInHash(main.FMId, "IsDelete", main.IsDelete.ToString());//是否删除    

                            //重新为“价值赋值”
                            string price = Math.Ceiling(Convert.ToDecimal(((long.Parse(client.GetValueFromHash(main.FMId, "FMNumber")) * 2) +//点赞数量
                            long.Parse(client.GetValueFromHash(main.FMId, "FMViewCount")) +//浏览数量
                            (number * 3)) / 3.0)).ToString();//评论数量[从后台拿到]
                            client.SetEntryInHash(main.FMId, "jiazhi", price);//【价值数量=浏览分数+点赞分数+评论分数】
                        }//if end

                        forumMains.Add(new Model.nf_ForumMain()
                        {
                            FMId = client.GetValueFromHash(item, "FMId") as string,//帖子编号
                            FMTitle = client.GetValueFromHash(item, "FMTitle") as string,//帖子标题
                            FMArea = int.Parse(client.GetValueFromHash(item, "FMArea")) == 0 ? -1 : int.Parse(client.GetValueFromHash(item, "FMArea")),//区域编号
                            FMClassify = int.Parse(client.GetValueFromHash(item, "FMClassify")) == 0 ? -1 : int.Parse(client.GetValueFromHash(item, "FMClassify")),//分类编号
                            LId = client.GetValueFromHash(item, "LId") as string,//标签编号
                            messager = client.GetValueFromHash(item, "messager") as string,//发帖人编号
                            FMTime = DateTime.Parse(client.GetValueFromHash(item, "FMTime")),//发帖时间
                            FMContent = client.GetValueFromHash(item, "FMContent") as string,//帖子内容
                            FBodyContent = client.GetValueFromHash(item, "FBodyContent") as string,//纯文本内容
                            FImagesUrl = client.GetValueFromHash(item, "FImagesUrl") as string,//图片路径
                            FMNumber = int.Parse(client.GetValueFromHash(item, "FMNumber")) == 0 ? -1 : int.Parse(client.GetValueFromHash(item, "FMNumber")),//点赞数量
                            FMViewCount = int.Parse(client.GetValueFromHash(item, "FMViewCount")) == 0 ? -1 : int.Parse(client.GetValueFromHash(item, "FMViewCount")),//浏览次数
                            jiazhi = int.Parse(client.GetValueFromHash(item, "jiazhi")) == 0 ? -1 : int.Parse(client.GetValueFromHash(item, "jiazhi")),//价值
                            Commentary = int.Parse(client.GetValueFromHash(item, "Commentary")) == 0 ? -1 : int.Parse(client.GetValueFromHash(item, "Commentary")),//评论数量
                            FMRecommend = int.Parse(client.GetValueFromHash(item, "FMRecommend")) == 0 ? -1 : int.Parse(client.GetValueFromHash(item, "FMRecommend")),//是否推荐
                            FMExamine = int.Parse(client.GetValueFromHash(item, "FMExamine")) == 0 ? -1 : int.Parse(client.GetValueFromHash(item, "FMExamine")),//是否审查
                            IsDelete = int.Parse(client.GetValueFromHash(item, "IsDelete")) == 0 ? -1 : int.Parse(client.GetValueFromHash(item, "IsDelete"))//是否删除
                        });//listObject end
                    }//foreach end
                }//using end         
                return forumMains;
            }
            catch (Exception ex)
            {
                return null;
            }
        }//function end

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Page
{
    /// 

    /// 博客表
    /// 说明：用户个人中心时，显示用户文章
    /// 
   public class pa_ForumMain
   {
        /// 

        /// 当前页
        /// 
        public int pageNo { get; set; }
        /// 

        /// 每页显示的条数
        /// 
        public int pageSize { get; set; }
        /// 

        /// 数据总数
        /// 
        public int pageCount { get; set; }
        /// 

        /// 动态分页总数
        /// 
        public int pageCountByParameter { get; set; }
        /// 

        /// 用户账号
        /// 
        public string userNum { get; set; }
        /// 

        /// 用户博文
        /// 
        public List<Model.nf_ForumMain> forumMains { get; set; }
   }
}

以上就是完整代码部分，亲测是可以使用的。
补充：我的前端是使用了“layui的流显示”==>点我哦
思路：和平常的分页一样，只是期间用户请求页的时候会先去缓存里面看是否存在，不在才会从数据库里面返回指定页区间的数据
本人觉得，思路比代码实现更重要。思路是代码的灵魂，所以我的代码仅供参考哦！早点睡觉哦，宝贝们