Redis C# Driver

• StackExchange.Redis StackOverflow 出品
• ServiceStack.Redis 需要商業(yè)授權(quán)疯趟，免費(fèi)版本限制每小時(shí)的查詢次數(shù)

以下是StackExchange.Redis的基本使用方式

• ConnectionMultiplexer

是StackExchange.Redis中的核心類畸裳，字面意思是連接多路復(fù)用器，表示Redis服務(wù)器集群，也可以是單實(shí)例，支持同步或異步的方式進(jìn)行連接，可使用配置文件岩睁，可重用并且線程安全。

• IDatabase

幾乎所有StackExchange.Redis中操作Redis的方法都在IDatabase中锐极，從ConnectionMultiplexer對(duì)象中獲取

var redis = ConnectionMultiplexer.Connect("localhost");
            IDatabase db = redis.GetDatabase();

Redis中的五種基本數(shù)據(jù)類型的操作

• string 字符串

var redis = ConnectionMultiplexer.Connect("localhost");

IDatabase db = redis.GetDatabase();

var value = "abcdefg";

db.StringSet("stringKey", value);

Console.WriteLine(db.StringGet("stringKey"));

• hash 哈希

var redis = ConnectionMultiplexer.Connect("localhost");

IDatabase db = redis.GetDatabase();

// StackExchange.Redis 類庫(kù)中的數(shù)據(jù)類型k-v形式
var hash = new HashEntry[]
{
    new HashEntry("1", "a"),
    new HashEntry("2", "b"),
    new HashEntry("3", "c")
};

db.HashSet("hashKey", hash);

var values = db.HashGet("hashKey", "1");

Console.WriteLine(values);

• list 列表

var redis = ConnectionMultiplexer.Connect("localhost");

IDatabase db = redis.GetDatabase();

db.KeyDelete("listKey");

// RightPush表示在尾部插入笙僚， LeftPush表示在頭部插入
db.ListRightPush("listKey", "abcdefghi".Select(x => (RedisValue)x.ToString()).ToArray());
db.ListLeftPush("listKey", "jk".Select(x => (RedisValue)x.ToString()).ToArray());

var values = db.ListRange("listKey");

for (int i = 0; i < values.Length; i++)
{
    Console.WriteLine(values[i]);
}
// 輸出結(jié)果為 : kjabcdefghi

• set 集合

var redis = ConnectionMultiplexer.Connect("localhost");

IDatabase db = redis.GetDatabase();

int totalUnfiltered = 0;
int totalFiltered = 0;

for (int i = 0; i < 1000; i++)
{
    db.SetAdd("setKey", i);
    totalUnfiltered += i;
    if (i.ToString().Contains("3"))
    {
        totalFiltered += i;
    }
}
var unfilteredActual = db.SetScan("setKey").Select(x => (int)x).Sum();

Console.WriteLine($"totalUnfiltered:{totalUnfiltered} - unfilteredActual:{unfilteredActual}");

var filteredActual = db.SetScan("setKey", "*3*").Select(x => (int)x).Sum();

Console.WriteLine($"totalFiltered:{totalFiltered} - filteredActual:{filteredActual}");

• zset 有序集合

var redis = ConnectionMultiplexer.Connect("localhost");

IDatabase db = redis.GetDatabase();

db.SortedSetAdd("zsetKey", "a", 1);
db.SortedSetAdd("zsetKey", "b", 2);
db.SortedSetAdd("zsetKey", "c", 3);

var arr = db.SortedSetScan("zsetKey").ToArray();

Console.WriteLine(arr.Any(x => x.Element == "a" && x.Score == 1));
Console.WriteLine(arr.Any(x => x.Element == "b" && x.Score == 2));
Console.WriteLine(arr.Any(x => x.Element == "c" && x.Score == 3));