c# Redis操作类

需要添加StackExchange.Redis.dll引用

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using log4net;
using Newtonsoft.Json;
using StackExchange.Redis;
using System.Configuration;

namespace PKTDataService
{
    class RedisHelper
    {
        ILog log = log4net.LogManager.GetLogger("RedisHelper");
        public ConnectionMultiplexer connection_ = null;
        private string redis_host = "127.0.0.1:6379";
        private int SORTTIMEOUT = 7;
        public RedisHelper()
        {
             int.TryParse( ConfigurationManager.AppSettings["DBSERVER"],out SORTTIMEOUT);
        }
        public RedisHelper(string host)
        {
            redis_host = host;
        }
        public bool connectRedis()
        {
            if (connection_ == null || !connection_.IsConnected)
            {
                try
                {
                    var options = ConfigurationOptions.Parse(redis_host);
                    options.AllowAdmin = true;
                    connection_ = ConnectionMultiplexer.Connect(options);

                }
                catch (StackExchange.Redis.RedisConnectionException ex)
                {
                    log.Error(ex.Message);
                }
                catch (Exception ex)
                {
                    log.Error(ex.Message);
                }
            }
            return connection_ != null && connection_.IsConnected;
        }

        public void CloseRedis()
        {
            if (connection_ != null || connection_.IsConnected)
            {
                try
                {
                    connection_.CloseAsync();
                    connection_.Dispose();

                }
                catch (StackExchange.Redis.RedisConnectionException ex)
                {
                    log.Error(ex.Message);
                }
                catch (Exception ex)
                {
                    log.Error(ex.Message);
                }
            }

        }

        public int multi_set_key(Dictionary<string, object> items , int timeout = 0)
        {
            int count = 0;
            if (connectRedis())
            {
                int v = 0;
                IDatabase db = connection_.GetDatabase();
                var trans = db.CreateTransaction();
                foreach (string key in items.Keys)
                {
                    string val = "";
                    object obj = new object();
                    if(items.TryGetValue(key, out obj))
                    {
                        val = obj.ToString();
                    }
                    if (!db.KeyExists(key))
                    {
                        trans.StringSetAsync(key, val);
                        trans.KeyExpireAsync(key, new TimeSpan(SORTTIMEOUT, 0, 0));//设置过期时间为3天
                        //if(timeout > 0)
                        //{
                        //    trans.KeyExpireAsync(key, new TimeSpan(0 , 0 , timeout));
                        //}
                        count++;
                    }
                }
                trans.Execute();
            }
            return count;
        }
        public bool slide_key_int(string key , int param)
        {
            if (connectRedis())
            {
                int v = 0;
                IDatabase db = connection_.GetDatabase();
                ITransaction trans = db.CreateTransaction();
                RedisValue val = db.StringGet(key);
                if (val.HasValue)
                {
                    Int32.TryParse(val.ToString(), out v);
                }
                v += param;
                db.StringSet(key, string.Format("{0}", v));
                log.Debug("更新redis值： " + key + "     " + val);
                return trans.Execute();
            }
            return false;
        }
        /// <summary>
        /// 删除并返回存储在键上的列表的最后一个元素。
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public string rpopQueue(string key)
        {
            if (connectRedis())
            {
                IDatabase db = connection_.GetDatabase();

                if (db.KeyExists(key))
                {
                    RedisValue val = db.ListRightPop(key);
                    if (val.HasValue)
                    {
                        log.Debug("删除的"+key + "的值為：   " + val);
                        return val.ToString();
                    }
                }
                else
                {
                  //  log.Debug("rpopQueue方法" + key + "不存在");
                }
            }
            return null;
        }
        public int lpushQueue(string key , string value)
        {
            int result = 0;
            if (connectRedis())
            {
                IDatabase db = connection_.GetDatabase();
                RedisValue val = db.ListLeftPush(key, value);
                if (val.IsInteger)
                {
                   val.TryParse(out result);
                }

            }
            return result;
        }

        public bool lpushQueue2(string key, string value)
        {
            int result = 0;
            if (connectRedis())
            {
                IDatabase db = connection_.GetDatabase();
                if (db.KeyExists(key))
                {
                    RedisValue val = db.ListLeftPush(key, value);
                    if (val.IsInteger)
                    {
                        val.TryParse(out result);
                    }
                    return true;
                }
                else
                {
                    RedisValue val = db.ListLeftPush(key, value);
                    return true;
                    //log.Warn("lpushQueue方法" + key + "不存在");
                }
            }
            return false;
        }

        public string rpoplpushQueue(string key)
        {
            if (connectRedis())
            {
                string push_key = string.Format("{0}_BACKUP", key);
                IDatabase db = connection_.GetDatabase();
                if (db.KeyExists(key))
                {
                    RedisValue val = db.ListRightPopLeftPush(key, push_key);
                    if (val.HasValue)
                    {
                        return val.ToString();
                    }
                }
                else
                {

                   // log.Debug("rpoplpushQueue方法" + key + "不存在");
                }
            }
            return null;
        }
        public string get_key(string key)
        {
            if (connectRedis())
            {
                IDatabase db = connection_.GetDatabase();
                if (db.KeyExists(key))
                {
                    RedisValue val = db.StringGet(key);
                    if (val.HasValue)
                    {
                        return val.ToString();
                    }
                }
            }
            return "";
        }
        public string delete_key(string key)
        {
            if (connectRedis())
            {
                IDatabase db = connection_.GetDatabase();
                if (db.KeyExists(key))
                {
                    db.KeyDelete(key);
                }
            }
            return "";
        }
        public bool set_key(string key , string val)
        {
            if (connectRedis())
            {
                IDatabase db = connection_.GetDatabase();

                return db.StringSet(key , val);
            }
            return false;
        }
        public bool KeyExpire(string key, string val, TimeSpan timeout)
        {
            if (connectRedis())
            {
                IDatabase db = connection_.GetDatabase();
                return db.StringSet(key, val, timeout);     

            }
            return false;
        }
        public bool KeyExsit(string key)
        {
            if (connectRedis())
            {
                IDatabase db=connection_.GetDatabase();
                return  db.KeyExists(key);
            }
            return false;
        }

        public string count_queue(string key)
        {
            if (connectRedis())
            {
                IDatabase db = connection_.GetDatabase();
                RedisValue val = db.ListLength(key);
                if (val.IsInteger)
                {
                    return val.ToString();
                }
            }
            return null;
        }

        /// <summary>
        /// 清空redis
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public bool FlushDatabase()
        {
            int num = 0;
            bool result = false;
            while (true)
            {
                try
                {
                    if (connectRedis())
                    {
                        connection_.GetServer(redis_host).FlushDatabase();
                        result = true;
                        break;
                    }
                    if (num > 10)
                    {
                        result = false;
                        break;
                    }
                }
                catch (Exception ex)
                {
                    num++;
                    log.Debug(ex.Message);
                }
            }
            return result;

        }
    }
}