发布：2021/5/21 17:03:24作者：管理员 来源：本站 浏览次数：1092
1、使用的Redis客户端为：ServiceStack.Redis
打开“程序包管理器控制台”，输入并执行“Install-Package ServiceStack.Redis”即可。
2、Redis基本数据类型：String
String类型是最常用的数据类型，在Redis中以KKey/Value存储。
using ServiceStack.Redis;
using System;
using System.Collections.Generic;
using System.Text;
namespace RedisDemo
{
class StringDemo
{
public static void Start()
{
var redisMangement = new RedisManagerPool("127.0.0.1:6379");
var client = redisMangement.GetClient();
//---字符串---
//set key value
//summary: Set the string value of a key
client.Set<int>("pwd", 111);
//get key
//summary: Get the value of a key
int pwd = client.Get<int>("pwd");
Console.WriteLine(pwd);
//---对象---
var todos = client.As<Todo>();
Todo todo = new Todo
{
Id = todos.GetNextSequence(),
Content = "String Demo",
Order = 1
};
client.Set<Todo>("todo", todo);
var getTodo = client.Get<Todo>("todo");
Console.WriteLine(getTodo.Content);
}
}
}
String的应用场景
计数器：许多运用都会使用redis作为计数的基础工具，他可以实现快速计数、查询缓存的功能。
比如：优酷视频的播放：incr video:videoId:playTimes
或者：文章浏览量：incr article:aricleId:clickTimes
或者粉丝数量：取关 decr author:authorId:fansNumber
3、Redis基本数据类型：Hash
Hash在Redis采用 (HashId,Key，Value)进行存储，一个HashId 可以包含多个key，一个key对应着一个value。
using ServiceStack.Redis;
using System;
using System.Collections.Generic;
using System.Text;
namespace RedisDemo
{
class HashDemo
{
public static void Start()
{
var redisMangement = new RedisManagerPool("127.0.0.1:6379");
var client = redisMangement.GetClient();
//HSET key field value
//summary: Set the string value of a hash field
client.SetEntryInHash("test", "name", "ermao");
client.SetEntryInHash("test", "age", "26");
//---获取test哈希下的所有key---
//HKEYS key
//summary: Get all the fields in a hash
List<string> hashKeys = client.GetHashKeys("test");
Console.WriteLine("keys in test");
foreach (var item in hashKeys)
{
Console.WriteLine(item);
}
//---获取test哈希下的所有值---
//HVALS key
//summary: Get all the values in a hash
List<string> hashValues = client.GetHashValues("test");
Console.WriteLine("values in test");
foreach (var item in hashValues)
{
Console.WriteLine(item);
}
//---获取test哈希下，第一个Key对应的值---
//HGET key field
//summary: Get the value of a hash field
string value = client.GetValueFromHash("test", hashKeys[0]);
Console.WriteLine($"test下的key{hashKeys[0]}对应的值{value}");
}
}
}
Hash的应用场景
商品详情页
4、Redis基本数据类型：List
list是一个链表结构，key可以理解为链表的名字，然后往这个名字所对应的链表里加值。，list可以以队列 / 栈的形式进行工作。
using ServiceStack.Redis;
using System;
using System.Collections.Generic;
using System.Text;
namespace RedisDemo
{
class ListDemo
{
public static void Start()
{
var redisMangement = new RedisManagerPool("127.0.0.1:6379");
var client = redisMangement.GetClient();
//---队列的使用（先进先出）---
client.EnqueueItemOnList("name", "zhangsan");
client.EnqueueItemOnList("name", "lisi");
long count = client.GetListCount("name");
for (int i = 0; i < count; i++)
{
Console.WriteLine(client.DequeueItemFromList("name"));
}
//---栈的使用（先进后出）---
client.PushItemToList("course", "Math");
client.PushItemToList("course", "English");
long count2 = client.GetListCount("course");
for (int i = 0; i < count2; i++)
{
Console.WriteLine(client.PopItemFromList("course"));
}
}
}
}
List的应用场景
点赞：
创建一条微博内容：set user:1:post:91 “hello redis”;
点赞：
lpush post:91:good “kobe.png”
lpush post:91:good “jordan.png”
lpush post:91:good “James.png”
查看有多少人点赞：llen post:91:good
查看有哪些人点赞：lrange post:91:good 0 -1
5、Redis基本数据类型：Set
它是去重、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。
using ServiceStack.Redis;
using System;
using System.Collections.Generic;
using System.Text;
namespace RedisDemo
{
class SetDemo
{
public static void Start()
{
var redisMangement = new RedisManagerPool("127.0.0.1:6379");
var client = redisMangement.GetClient();
//SADD key member [member ...]
//summary: Add one or more members to a set
client.AddItemToSet("s1", "abc");
client.AddItemToSet("s1", "qwer");
client.AddItemToSet("s1", "asdf");
client.AddItemToSet("s1", "hjkl");
client.AddItemToSet("s1", "zxc");
//SMEMBERS key
//summary: Get all the members in a set
HashSet<string> hashSet = client.GetAllItemsFromSet("s1");
foreach (var item in hashSet)
{
Console.WriteLine(item);
}
client.AddItemToSet("s2", "qwer");
client.AddItemToSet("s2", "wasd");
//SUNION key [key ...]
//summary: Add multiple sets
HashSet<string> hashSetUnion = client.GetUnionFromSets(new string[] { "s1", "s2" });
Console.WriteLine("---并集---");
foreach (var item in hashSetUnion)
{
Console.WriteLine(item);
}
//SINTER key [key ...]
//summary: Intersect multiple sets
HashSet<string> hashSetInter = client.GetIntersectFromSets(new string[] { "s1", "s2" });
Console.WriteLine("---交集---");
foreach (var item in hashSetInter)
{
Console.WriteLine(item);
}
//SDIFF key [key ...]
//summary: Subtract multiple sets
HashSet<string> hashSetDifference = client.GetDifferencesFromSet("s1", new string[] { "s2" });
Console.WriteLine("---差集---");
foreach (var item in hashSetDifference)
{
Console.WriteLine(item);
}
}
}
}
Set的应用场景
随机事件（如：抽奖）、共同好友、推荐好友、统计每天的新增用户数和第二天的留存用户数等
6、Redis基本数据类型：SortedSet
set是一种非常方便的结构，但是数据无序，redis提供了一个sorted set，每一个添加的值都有一个对应的分数，放进去的值按照该分数升序存在一个集合中，可以通过这个分数进行相关排序的操作。
using ServiceStack.Redis;
using System;
using System.Collections.Generic;
using System.Text;
namespace RedisDemo
{
class SortedSetDemo
{
public static void Start()
{
var redisMangement = new RedisManagerPool("127.0.0.1:6379");
var client = redisMangement.GetClient();
//ZADD key [NX|XX] [CH] [INCR] score member [score member ...]
//summary: Add one or more members to a sorted set, or update its score if it already exists
client.AddItemToSortedSet("grade", "Chinese", 82);
client.AddItemToSortedSet("grade", "Math", 96);
client.AddItemToSortedSet("grade", "English", 91);
client.AddItemToSortedSet("grade", "History", 97);
//ZREVRANGE key start stop [WITHSCORES]
//summary: Return a range of members in a sorted set, by index, with scores ordered from high to low
List<string> sortedList = client.GetAllItemsFromSortedSetDesc("grade");
foreach (var item in sortedList)
{
Console.WriteLine(item);
}
}
}
}
SortedSet的应用场景
