我看不到Azure日志流中的日志

时间:2020-03-19 00:52:47

标签: c# logging azure-web-app-service asp.net-core-3.1

我正在尝试记录我的ASP.NET Core应用程序的信息,但找不到在Azure Log Stream中显示消息的方法。当我在Visual Studio中调试时,应用程序成功记录日志,但是发布到Azure时却看不到任何东西。

这是我的应用服务日志的样子: App Service Logs

我尝试使用Microsoft文档中发现的不同方法进行日志记录,但均未奏效。

    [HttpGet]
    public string Index()
    {
        Trace.TraceInformation("You are in the face recognition controller. Trace");
        _logger.LogInformation("You are in the face recognition controller. Logger");
        return "You are in the face recognition controller";
    }

控制器构造函数:

    private readonly ILogger _logger;
    public FaceRecognitionController(ILoggerFactory loggerFactory)
    {
        _logger = loggerFactory.CreateLogger<FaceRecognitionController>();
    }

配置方法:

public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        loggerFactory.CreateLogger("console");
        loggerFactory.CreateLogger("debug");

        app.UseHttpsRedirection();

        app.UseRouting();

        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllers();
        });
    }

有人知道我能做什么吗?

日志流截图: enter image description here

1 个答案:

答案 0 :(得分:5)

对于.NET core 3.1,请按照以下步骤操作:

1。为项目安装nuget packagae Microsoft.Extensions.Logging.AzureAppServices, Version 3.1.2Microsoft.Extensions.Logging.Console, version 3.1.2

2。在Startup.cs-> ConfigureServices方法中,添加以下代码:

    public void ConfigureServices(IServiceCollection services)
    {
        //other code

        //add the following code
        services.AddLogging(loggingBuilder =>
        {
            loggingBuilder.AddConsole();
            loggingBuilder.AddDebug();
            loggingBuilder.AddAzureWebAppDiagnostics();
        });
    }

然后在控制器类中,代码如下:

    private readonly ILogger<HomeController> _logger;

    public HomeController(ILogger<HomeController> logger)
    {
        _logger = logger;
    }

    public IActionResult Index()
    {
        _logger.LogInformation("**********first: hello, this is a test message!!!");
        _logger.LogInformation("**********second: hello, this is a test message!!!");
        return View();
    }

3。将其发布到azure,然后按照您的帖子中所述配置“ App Service Logs”。

4.Nav在Azure门户中导航到“日志流”,然后访问该网站,您可以看到日志:

enter image description here

注意:您应该始终在asp.net核心中使用ILogger进行日志记录,Trace.TraceInformation可能对此不起作用。

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