C# Redis 连接

前面我们已经准备成功开启Redis服务，其端口号为6379，接下来我们就看看如何使用C#语言来操作Redis。就如MongoDB一样，要操作Redis服务，自然就需要下载C#的客户端，这里通过Nuget下载了“ServiceStack.Redis”客户端，引入成功之后，就可以使用C#来对Redis服务进行操作了。

由于Redis一般是用来作为缓存的，也就是一般我们把一些不经常改变的数据通过Redis缓存起来，之后用户的请求就不需要再访问数据库，而可以直接从Redis缓存中直接获取，这样就可以减轻数据库服务器的压力以及加快响应速度。既然是用来做缓存的，也就是通过指定key值来把对应Value保存起来，之后再根据key值来获得之前缓存的值。具体的操作代码如下所示，这里就不过多介绍了。

请参考以下代码 -

class Program
    {
        static void Main(string[] args)
        {
            //在Redis中存储常用的5种数据类型：String,Hash,List,SetSorted set
            var client = new RedisClient("127.0.0.1", 6379);
            //AddString(client);
            //AddHash(client);
            //AddList(client);
            //AddSet(client);
            AddSetSorted(client);

            Console.ReadLine();
        }

        private static void AddString(RedisClient client)
        {
            var timeOut = new TimeSpan(0,0,0,30);
            client.Add("Test", "Learninghard", timeOut);
            while (true)
            {
                if (client.ContainsKey("Test"))
                {
                    Console.WriteLine("String Key: Test -Value: {0}, 当前时间: {1}", client.Get<string>("Test"), DateTime.Now);
                    Thread.Sleep(10000);
                }
                else
                {
                    Console.WriteLine("Value 已经过期了，当前时间：{0}", DateTime.Now);
                    break;
                }
            }

            var person = new Person() {Name = "Learninghard", Age = 26};
            client.Add("lh", person);
            var cachePerson = client.Get<Person>("lh");
            Console.WriteLine("Person's Name is : {0}, Age: {1}", cachePerson.Name, cachePerson.Age);
        }

        private static void AddHash(RedisClient client)
        {
            if (client == null) throw new ArgumentNullException("client");

            client.SetEntryInHash("HashId", "Name", "Learninghard");
            client.SetEntryInHash("HashId", "Age", "26");
            client.SetEntryInHash("HashId", "Sex", "男");

            var hashKeys = client.GetHashKeys("HashId");
            foreach (var key in hashKeys)
            {
                Console.WriteLine("HashId--Key:{0}", key);
            }

            var haskValues = client.GetHashValues("HashId");
            foreach (var value in haskValues)
            {
                Console.WriteLine("HashId--Value:{0}", value);
            }

            var allKeys = client.GetAllKeys(); //获取所有的key。
            foreach (var key in allKeys)
            {
                Console.WriteLine("AllKey--Key:{0}", key);
            }
        }

        private static void AddList(RedisClient client)
        {
            if (client == null) throw new ArgumentNullException("client");

            client.EnqueueItemOnList("QueueListId", "1.Learnghard");  //入队
            client.EnqueueItemOnList("QueueListId", "2.张三");
            client.EnqueueItemOnList("QueueListId", "3.李四");
            client.EnqueueItemOnList("QueueListId", "4.王五");
            var queueCount = client.GetListCount("QueueListId");

            for (var i = 0; i < queueCount; i++)
            {
                Console.WriteLine("QueueListId出队值：{0}", client.DequeueItemFromList("QueueListId"));   //出队(队列先进先出)
            }

            client.PushItemToList("StackListId", "1.Learninghard");  //入栈
            client.PushItemToList("StackListId", "2.张三");
            client.PushItemToList("StackListId", "3.李四");
            client.PushItemToList("StackListId", "4.王五");

            var stackCount = client.GetListCount("StackListId");
            for (var i = 0; i < stackCount; i++)
            {
                Console.WriteLine("StackListId出栈值：{0}", client.PopItemFromList("StackListId"));   //出栈(栈先进后出)
            }
        }

        //它是string类型的无序集合。set是通过hash table实现的，添加，删除和查找,对集合我们可以取并集，交集，差集
        private static void AddSet(RedisClient client)
        {
            if (client == null) throw new ArgumentNullException("client");

            client.AddItemToSet("Set1001", "A");
            client.AddItemToSet("Set1001", "B");
            client.AddItemToSet("Set1001", "C");
            client.AddItemToSet("Set1001", "D");
            var hastset1 = client.GetAllItemsFromSet("Set1001");
            foreach (var item in hastset1)
            {
                Console.WriteLine("Set无序集合Value:{0}", item); //出来的结果是无须的
            }

            client.AddItemToSet("Set1002", "K");
            client.AddItemToSet("Set1002", "C");
            client.AddItemToSet("Set1002", "A");
            client.AddItemToSet("Set1002", "J");
            var hastset2 = client.GetAllItemsFromSet("Set1002");
            foreach (var item in hastset2)
            {
                Console.WriteLine("Set无序集合ValueB:{0}", item); //出来的结果是无须的
            }

            var hashUnion = client.GetUnionFromSets(new string[] { "Set1001", "Set1002" });
            foreach (var item in hashUnion)
            {
                Console.WriteLine("求Set1001和Set1002的并集:{0}", item); //并集
            }

            var hashG = client.GetIntersectFromSets(new string[] { "Set1001", "Set1002" });
            foreach (var item in hashG)
            {
                Console.WriteLine("求Set1001和Set1002的交集:{0}", item);  //交集
            }

            var hashD = client.GetDifferencesFromSet("Set1001", new string[] { "Set1002" });  //[返回存在于第一个集合，但是不存在于其他集合的数据。差集]
            foreach (var item in hashD)
            {
                Console.WriteLine("求Set1001和Set1002的差集:{0}", item);  //差集
            }

        }

        /*
        sorted set 是set的一个升级版本，它在set的基础上增加了一个顺序的属性，这一属性在添加修改.元素的时候可以指定，
        * 每次指定后，zset(表示有序集合)会自动重新按新的值调整顺序。可以理解为有列的表，一列存 value,一列存顺序。操作中key理解为zset的名字.
        */
        private static void AddSetSorted(RedisClient client)
        {
            if (client == null) throw new ArgumentNullException("client");

            client.AddItemToSortedSet("SetSorted1001", "A");
            client.AddItemToSortedSet("SetSorted1001", "B");
            client.AddItemToSortedSet("SetSorted1001", "C");
            var listSetSorted = client.GetAllItemsFromSortedSet("SetSorted1001");
            foreach (var item in listSetSorted)
            {
                Console.WriteLine("SetSorted有序集合{0}", item);
            }

            client.AddItemToSortedSet("SetSorted1002", "A", 400);
            client.AddItemToSortedSet("SetSorted1002", "D", 200);
            client.AddItemToSortedSet("SetSorted1002", "B", 300);

            // 升序获取第一个值:"D"
            var list = client.GetRangeFromSortedSet("SetSorted1002", 0, 0);

            foreach (var item in list)
            {
                Console.WriteLine(item);
            }

            //降序获取第一个值:"A"
            list = client.GetRangeFromSortedSetDesc("SetSorted1002", 0, 0);

            foreach (var item in list)
            {
                Console.WriteLine(item);
            }
        }
    }

    class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }
    }

C#

Redis Desktop Manager　的下载地址为：http://pan.baidu.com/s/1sjp55Ul