NLog不登录数据库

Question

我无法使用NLog登录数据库。问题是什么？我正在使用ASP.NET Core 2.0 WebApi。

在Startup.cs上

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    {
        loggerFactory.AddNLog();

        app.UseMvc();
        app.AddNLogWeb();

        var databaseTarget = new DatabaseTarget("DatabaseTarget");
        databaseTarget.CommandText = "insert into dbo.Log (Message) values (@Message)";
        databaseTarget.CommandType = System.Data.CommandType.Text;
        databaseTarget.ConnectionString = @"server=.\SQLEXPRESS;database=CiPetPet;integrated security=true;";
        databaseTarget.DBProvider = "sqlserver";
        databaseTarget.Parameters.Add(new DatabaseParameterInfo("@Message", "${message}"));

        LogManager.Configuration = new NLog.Config.LoggingConfiguration();
        LogManager.Configuration.AddTarget("DatabaseTarget", databaseTarget);
        LogManager.Configuration.LoggingRules.Add(new NLog.Config.LoggingRule("*", NLog.LogLevel.Trace, databaseTarget));

        InternalLogger.LogFile = "InternalLog.txt";
    }

在控制器上

        [HttpGet]
    public string Index()
    {
        LogManager.EnableLogging();
        var logger = LogManager.GetCurrentClassLogger();
        logger.Debug("Debug log");
        logger.Error("Error log");
        logger.Fatal("Fatal log");
        logger.Info("Info log");
        logger.Warn("Warn log");

        return "Logging...";
    }

内部日志文件正常工作。但是数据库日志不起作用。