我们需要添加一个Redis包：Microsoft.Extensions.Caching.Redis，这是官方的

1.在appsettings.json添加配置,如下图：

说明：

CacheProvider：　ConnectionString　　 --- Redis连接       

　　　　　　　　  InstanceName　　　  ---Redis实例名称   

 2.在startup添加redis服务，如下图

3.缓存接口 ICacheService

 

public interface ICacheService

{

/// <summary>

/// 获取缓存

/// </summary>

/// <param name="key">缓存key</param>

/// <returns></returns>

string Get(string key);

/// <summary>

///

/// </summary>

/// <param name="key"></param>

/// <returns></returns>

string GetString(string key);

/// <summary>

///

/// </summary>

/// <param name="key"></param>

/// <param name="value"></param>

void AddString(string key, string value);

/// <summary>

/// 添加缓存

/// </summary>

/// <param name="key">缓存key</param>

/// <param name="value">缓存值</param>

/// <param name="ExpirationTime">绝对过期时间(分钟)</param>

void Add(string key, string value, int ExpirationTime = 20);

/// <summary>

/// 移除缓存

/// </summary>

/// <param name="key"></param>

void Remove(string key);

/// <summary>

/// 更新缓存

/// </summary>

/// <param name="key"></param>

/// <param name="value"></param>

/// <param name="ExpirationTime"></param>

void Replace(string key, string value, int ExpirationTime = 20);

4.实现接口 ICacheService

public class RedisCacheService:ICacheService

{

private RedisCache _redisCache = null;

public RedisCacheService(RedisCacheOptions options)

{

_redisCache = new RedisCache(options);

}

/// <summary>

/// 获取缓存

/// </summary>

/// <param name="key">缓存key</param>

/// <returns></returns>

public string Get(string key)

{

try

{

if (!string.IsNullOrEmpty(key))

{

return Encoding.UTF8.GetString(_redisCache.Get(key));

}

else

{

return string.Empty;

}

}

catch

{

return null;

}

}

/// <summary>

/// 添加缓存

/// </summary>

/// <param name="key">缓存key</param>

/// <param name="value">缓存值</param>

/// <param name="ExpirationTime">绝对过期时间(分钟)</param>

public void Add(string key,string value,int ExpirationTime=20)

{

if (!string.IsNullOrEmpty(key))

{

_redisCache.Set(key, Encoding.UTF8.GetBytes(value), new DistributedCacheEntryOptions()

{

AbsoluteExpiration = DateTimeOffset.Now.AddMinutes(ExpirationTime)

});

}

}

public void AddString(string key, string value)

{

_redisCache.SetString(key,value);

}

public string GetString(string key)

{

return _redisCache.GetString(key);

}

/// <summary>

/// 移除缓存

/// </summary>

/// <param name="key">缓存key</param>

public void Remove(string key)

{

if (!string.IsNullOrEmpty(key))

{

_redisCache.Remove(key);

}

}

/// <summary>

/// 更新缓存

/// </summary>

/// <param name="key">缓存key</param>

/// <param name="value">缓存值</param>

/// <param name="ExpirationTime"></param>

public void Replace(string key, string value, int ExpirationTime = 20)

{

if (!string.IsNullOrEmpty(key))

{

_redisCache.Remove(key);

_redisCache.Set(key, Encoding.UTF8.GetBytes(value), new DistributedCacheEntryOptions()

{

AbsoluteExpiration = DateTimeOffset.Now.AddMinutes(ExpirationTime)

});

}

}

}