c# - 无法解析 ASP.Net Core 中类型“ServiceStack.Redis.Generic.IRedisTypedClient”的服务

Question

我有 ASP.Net Core 2.1 应用程序。需要使用RedisCache作为Cache。

这就是我的方法将项目添加到缓存的方式。

public class RedisCache : ICache<Customer> //custom interface
{
    #region Private

    private readonly IConfiguration _configuration;
    private readonly IDatabase _cache;
    private readonly ConnectionMultiplexer _connection;
    private readonly IRedisTypedClient<Customer> _redisClient;

    #endregion Private

    #region Ctor

    public RedisCache(IConfiguration configuration, IRedisTypedClient<Customer> redisClient)
    {
        _configuration = configuration;
        _connection = ConnectionMultiplexer.Connect(configuration.GetSection("AWS:Cache")["Redis:Server"]);
        _cache = _connection.GetDatabase();
        _redisClient = redisClient;
    }

    #endregion Ctor

    public async Task<Customer> AddItem(Customer item)
    {
        try
        {
            await Task.Run(() => _redisClient.GetAndSetValue(item.Id, item)).ConfigureAwait(false);
            return item;
        }
        catch (Exception ex)
        {
            Logger.Log(ex, item);
            return null;
        }
    }
}

依赖注册

 services.AddScoped<IRedisTypedClient<Customer>>(); //DI Registration

当应用程序运行时，它会抛出错误

Unable to resolve service for type 'ServiceStack.Redis.Generic.IRedisTypedClient

因此尝试将 DI 注册为

services.AddScoped<IRedisTypedClient<Customer>>(di => new RedisTypedClient);

但没有找到这样的东西，编译器会抛出构建错误。

如何注册此IRedisTypedClient依赖项？

谢谢!

Answer 1

最后一段代码更接近您需要的内容，但很明显为什么会引发编译时错误。您没有包含泛型类型参数，并且缺少括号，即使如此，该类型几乎肯定必须在构造函数中采用一些您没有提供的参数。它应该看起来像:

services.AddScoped<IRedisTypedClient<Customer>>(p =>
{
    // Use `p` to get services, config values etc. For example:
    // var config = p.GetRequiredService<IConfiguration>();
    return new RedisTypedClient<Customer>(someParam);
}

也就是说，对于缓存，您不应该直接使用 Redis。您应该注入(inject) IDistributedCache 然后包含 Redis cache provider :

services.AddStackExchangeRedisCache(options =>
{
    options.Configuration = "localhost";
    options.InstanceName = "SampleInstance";
});