c#如何将数据缓存至Redis

布满荆棘的人生 2024-03-16 13:36 68阅读 0赞

## 环境准备 ##

首先肯定是需要安装redis啦！这是我跑在docker的redis，和安装在本地的是 一样的效果

![6a680f2271634648956c244688d5c889.png][]

可视化工具Redis Desktop Manager。

![b7efe2acba43429fa8f49b0c852bf6b2.png][]

## 使用方法 ##

第一步，安装nuget包

Microsoft.Extensions.Caching.StackExchangRedis

![37a93f672c7c4c3d91e96f5dc742ae60.png][]

创建一个asp.net.core项目，在var app = builder.Build();前注入依赖

builder.Services.AddStackExchangeRedisCache(opt =>
    {
        opt.Configuration = "localhost";
        opt.InstanceName = "cache1_";
    });

新建一个测试controller，引用刚刚注册的依赖

private readonly IDistributedCache _distributedCache;
    
        public TestController(IDistributedCache distributedCache)
        {
            _distributedCache = distributedCache;
        }

然后编写一个get请求

[HttpGet]
        public async Task<ActionResult<Person?>> Test(long id)
        {
            Person? person;
            // 去redis中查找有没有该数据
            string? s = await _distributedCache.GetStringAsync("Person" + id);
            if (s == null)
            {
                Console.WriteLine("数据不存在，从数据库中获取");
                person = MyDbContext.GetById(id);
                Console.WriteLine("把获取的数据存到redis");
                await _distributedCache.SetStringAsync("Person" + id, JsonSerializer.Serialize(person));
            }
            else
            {
                Console.WriteLine("在redis中找到该数据");
                person = JsonSerializer.Deserialize<Person?>(s);
            }
    
            return person;
        }

打个断点看看，\_distributedCache.GetStringAsync("Person" + id);从redis拿一个Persion1

![2ec86762fef04493b085c62fdad772a6.png][]

![10b4dd1745d04c0c9ec04b0da7ce3a6a.png][]

第一次获取，数据肯定是不存在的，获取到后通过

await _distributedCache.SetStringAsync("Person" + id,JsonSerializer.Serialize(person));

把数据存到redis中，查看我们的redis

![c509267fc68f4b3bb5109ddf5f97dbcd.png][]

再次获取同一条数据，此时就在redis中拿到了刚刚缓存的数据

![50492b1c6e4841faa238f80bf0b3b1dc.png][]

这里的cache person 这些key命名都不是固定的，具体看实际业务设计，避免和其他冲突出现key相同的情况

var code = "e258771e-aae5-46d6-9b16-fd74812c193c"

[6a680f2271634648956c244688d5c889.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/16/e86873b818fc46b49f1886ab095d7bae.png
[b7efe2acba43429fa8f49b0c852bf6b2.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/16/ee0f2693e9d440fe903bdcd51a8323ff.png
[37a93f672c7c4c3d91e96f5dc742ae60.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/16/192ee68c35524e8ab97b52149347aecc.png
[2ec86762fef04493b085c62fdad772a6.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/16/61ff2bfc5608413bb89e80eb72e36bbf.png
[10b4dd1745d04c0c9ec04b0da7ce3a6a.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/16/104faeefc09f42bb892841b444734648.png
[c509267fc68f4b3bb5109ddf5f97dbcd.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/16/1ac131f210ae4b6fa8a154e3a5d87eb4.png
[50492b1c6e4841faa238f80bf0b3b1dc.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/16/ea28d383179e4b509d4196aca92e9b09.png