Entity Framework Core 3.1 学习笔记4 配置

配置NoTracking不需要变化追踪，我注释了。

 public DemoContext() {
            //ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
        }

配置日志：

nuget包：

    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="3.1.4" />

   protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder
                .UseLoggerFactory(ConsoleLoggerFactory)
                .UseSqlServer(connectionString: @"Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=Demo;");
            //base.OnConfiguring(optionsBuilder);
        }

 public static readonly ILoggerFactory ConsoleLoggerFactory =
            LoggerFactory.Create(builder =>
            {
                builder.AddFilter((category, level) =>
                category == DbLoggerCategory.Database.Command.Name
                && level == LogLevel.Information).AddConsole();

            });

效果图