c# - 如何将 ILogger 注入(inject) EFCore DbContext

Question

我有带有 EFCore 数据库上下文的 .net 核心应用程序:

public class MyappDbContext : DbContext
{
    private ILogger<MyappDbContext> _logger;

    public MyappDbContext(DbContextOptions<MyappDbContext> options)
        : base(options)
    {
        // ???
    }
}

在启动类中我注册了上下文:

services.AddDbContext<MyappDbContext>(options => options.UseSqlServer(connectionString));

如何注入(inject) MyappDbContext、ILogger 或 ILoggerFactory(以创建记录器)？

Answer 1

您需要做的就是向上下文构造函数添加一个ILoggerFactory 或ILogger 参数:

public class MyappDbContext : DbContext
{
    private readonly ILogger<MyappDbContext> _logger;

    public MyappDbContext(DbContextOptions<MyappDbContext> options,
        ILogger<MyappDbContext> logger)
        : base(options)
    {
        _logger = logger;
    }
}