Redis： REmote DIctionary Server 远程字典(内存)服务器,基于内存管理(数据全部存在内存)，实现了多种数据结构的，单线程模型的应用程序，提供插入-查询-固化-集群功能。
Redis特点：速度快，数据可能丢失，只能做缓存，而不是存储。
以下核心代码(这里采用的是StackExchange)
using Newtonsoft.Json;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Text;
namespace Redis.Exchange
{
public class RedisCommon
{
//redis数据库连接字符串
private string _conn = "127.0.0.1:6378";
private int _db = 0;
//静态变量 保证各模块使用的是不同实例的相同链接
private static ConnectionMultiplexer connection;
public RedisCommon() { }
/// <summary>
/// 构造函数
/// </summary>
/// <param name="db"></param>
/// <param name="connectStr"></param>
public RedisCommon(int db, string connectStr)
{
_conn = connectStr;
_db = db;
}
/// <summary>
/// 缓存数据库，数据库连接
/// </summary>
public ConnectionMultiplexer CacheConnection
{
get
{
try
{
if (connection == null || !connection.IsConnected)
{
connection = new Lazy<ConnectionMultiplexer>(() => ConnectionMultiplexer.Connect(_conn)).Value;
}
}
catch (Exception ex)
{
return null;
}
return connection;
}
}
/// <summary>
/// 缓存数据库
/// </summary>
public IDatabase CacheRedis => CacheConnection.GetDatabase(_db);
#region --KEY/VALUE存取--
/// <summary>
/// 单条存值
/// </summary>
/// <param name="key">key</param>
/// <param name="value">The value.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
public bool StringSet(string key, string value)
{
return CacheRedis.StringSet(key, value);
}
/// <summary>
/// 保存单个key value
/// </summary>
/// <param name="key">Redis Key</param>
/// <param name="value">保存的值</param>
/// <param name="expiry">过期时间</param>
/// <returns></returns>
public bool StringSet(string key, string value, TimeSpan? expiry = default(TimeSpan?))
{
return CacheRedis.StringSet(key, value, expiry);
}
/// <summary>
/// 保存多个key value
/// </summary>
/// <param name="arr">key</param>
/// <returns></returns>
public bool StringSet(KeyValuePair<RedisKey, RedisValue>[] arr)
{
return CacheRedis.StringSet(arr);
}
/// <summary>
/// 批量存值
/// </summary>
/// <param name="keysStr">key</param>
/// <param name="valuesStr">The value.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
public bool StringSetMany(string[] keysStr, string[] valuesStr)
{
var count = keysStr.Length;
var keyValuePair = new KeyValuePair<RedisKey, RedisValue>[count];
for (int i = 0; i < count; i++)
{
keyValuePair[i] = new KeyValuePair<RedisKey, RedisValue>(keysStr[i], valuesStr[i]);
}
return CacheRedis.StringSet(keyValuePair);
}
/// <summary>
/// 保存一个对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <param name="obj"></param>
/// <returns></returns>
public bool SetStringKey<T>(string key, T obj, TimeSpan? expiry = default(TimeSpan?))
{
string json = JsonConvert.SerializeObject(obj);
return CacheRedis.StringSet(key, json, expiry);
}
/// <summary>
/// 追加值
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public void StringAppend(string key, string value)
{
////追加值，返回追加后长度
long appendlong = CacheRedis.StringAppend(key, value);
}
/// <summary>
/// 获取单个key的值
/// </summary>
/// <param name="key">Redis Key</param>
/// <returns></returns>
public RedisValue GetStringKey(string key)
{
return CacheRedis.StringGet(key);
}
/// <summary>
/// 根据Key获取值
/// </summary>
/// <param name="key">键值</param>
/// <returns>System.String.</returns>
public string StringGet(string key)
{
try
{
return CacheRedis.StringGet(key);
}
catch (Exception ex)
{
return null;
}
}
/// <summary>
/// 获取多个Key
/// </summary>
/// <param name="listKey">Redis Key集合</param>
/// <returns></returns>
public RedisValue[] GetStringKey(List<RedisKey> listKey)
{
return CacheRedis.StringGet(listKey.ToArray());
}
/// <summary>
/// 批量获取值
/// </summary>
public string[] StringGetMany(string[] keyStrs)
{
var count = keyStrs.Length;
var keys = new RedisKey[count];
var addrs = new string[count];
for (var i = 0; i < count; i++)
{
keys[i] = keyStrs[i];
}
try
{
var values = CacheRedis.StringGet(keys);
for (var i = 0; i < values.Length; i++)
{
addrs[i] = values[i];
}
return addrs;
}
catch (Exception ex)
{
return null;
}
}
/// <summary>
/// 获取一个key的对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public T GetStringKey<T>(string key)
{
return JsonConvert.DeserializeObject<T>(CacheRedis.StringGet(key));
}
#endregion
#region --删除设置过期--
/// <summary>
/// 删除单个key
/// </summary>
/// <param name="key">redis key</param>
/// <returns>是否删除成功</returns>
public bool KeyDelete(string key)
{
return CacheRedis.KeyDelete(key);
}
/// <summary>
/// 删除多个key
/// </summary>
/// <param name="keys">rediskey</param>
/// <returns>成功删除的个数</returns>
public long KeyDelete(RedisKey[] keys)
{
return CacheRedis.KeyDelete(keys);
}
/// <summary>
/// 判断key是否存储
/// </summary>
/// <param name="key">redis key</param>
/// <returns></returns>
public bool KeyExists(string key)
{
return CacheRedis.KeyExists(key);
}
/// <summary>
/// 重新命名key
/// </summary>
/// <param name="key">就的redis key</param>
/// <param name="newKey">新的redis key</param>
/// <returns></returns>
public bool KeyRename(string key, string newKey)
{
return CacheRedis.KeyRename(key, newKey);
}
/// <summary>
/// 删除hasekey
/// </summary>
/// <param name="key"></param>
/// <param name="hashField"></param>
/// <returns></returns>
public bool HaseDelete(RedisKey key, RedisValue hashField)
{
return CacheRedis.HashDelete(key, hashField);
}
/// <summary>
/// 移除hash中的某值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <param name="dataKey"></param>
/// <returns></returns>
public bool HashRemove(string key, string dataKey)
{
return CacheRedis.HashDelete(key, dataKey);
}
/// <summary>
/// 设置缓存过期
/// </summary>
/// <param name="key"></param>
/// <param name="datetime"></param>
public void SetExpire(string key, DateTime datetime)
{
CacheRedis.KeyExpire(key, datetime);
}
#endregion
}
}
以下是方法调用
static void Main(string[] args)
{
RedisCommon redisCommon = new RedisCommon();
//添加数据
redisCommon.StringSet("lqwvje", "罗分明33");
//添加过期时间 15秒过后期
redisCommon.SetExpire("lqwvje", DateTime.Now.AddSeconds(15));
//查看数据
string s = redisCommon.StringGet("lqwvje");
Person person = new Person();
person.name = "lqwvje009";
person.QQ = "78630559";
person.age = 18;
//添加一个对象
redisCommon.SetStringKey("test001", person);
//获取对象数据
Person person1 = redisCommon.GetStringKey<Person>("test001");
}
public class Person
{
public string name { get; set; }// = "lqwvje001";
public string QQ { get; set; }// = "78630559";
public int age { get; set; }
}