1.nuget:

 2、DbContext中加入一下语句：

 //输出到debug输出 public static readonly LoggerFactory LoggerFactory = new LoggerFactory(new[] { new DebugLoggerProvider() });

 protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { base.OnConfiguring(optionsBuilder); optionsBuilder.UseLoggerFactory(LoggerFactory); }

3、在输出窗口中看到：