【6月日新计划16】WPF入门-Prism中配置NLog

1. NLog

官網地址： nlog-project.org/

使用方法都在Getting started

1.1 Install

需要安装到NuGet的程序包

• NLog

• NLog.Config

安裝包自動產生一個Config文件

右鍵屬性，修改為永遠複製或者有更新時才複製，然後建置動作為Resource（相對路徑）/Content(絕對路徑)

如果沒有，則在根目錄手動創建一個NLog.config文件（xml文件）

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true"
      internalLogLevel="Info"
      internalLogFile="c:\temp\internal-nlog-AspNetCore.txt">

  <!-- enable asp.net core layout renderers -->
  <extensions>
    <add assembly="NLog.Web.AspNetCore" />
  </extensions>

  <!-- the targets to write to -->
  <targets>
    <!-- File Target for all log messages with basic details -->
    <target xsi:type="File" name="allfile" fileName="${basedir}/Logs/allfile/wpf-all-${shortdate}.log"
            layout="${longdate}|${event-properties:item=EventId:whenEmpty=0}|${level:uppercase=true}|${logger}|${message} ${exception:format=tostring}" />

    <!-- File Target for own log messages with extra web details using some ASP.NET core renderers -->
    <target xsi:type="File" name="ownFile-web" fileName="${basedir}/Logs/ownFile/wpf-own-${shortdate}.log"
            layout="${longdate}|${event-properties:item=EventId:whenEmpty=0}|${level:uppercase=true}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|${callsite}" />

    <!--Console Target for hosting lifetime messages to improve Docker / Visual Studio startup detection -->
    <target xsi:type="Console" name="lifetimeConsole" layout="${MicrosoftConsoleLayout}" />
  </targets>

  <!-- rules to map from logger name to target -->
  <rules>
    <!--All logs, including from Microsoft-->
    <logger name="*" minlevel="Trace" writeTo="allfile" />

    <!--Output hosting lifetime messages to console target for faster startup detection -->
    <logger name="Microsoft.Hosting.Lifetime" minlevel="Info" writeTo="lifetimeConsole, ownFile-web" final="true" />

    <!--Skip non-critical Microsoft logs and so log only own logs (BlackHole) -->
    <logger name="Microsoft.*" maxlevel="Info" final="true" />
    <logger name="System.Net.Http.*" maxlevel="Info" final="true" />

    <logger name="*" minlevel="Trace" writeTo="ownFile-web" />
  </rules>
</nlog>

1.2 config detail

github.com/NLog/NLog/w…

2. Register

2.1 Exception

    ObservableCollection<WeatherDto01> weather001 = (ObservableCollection<WeatherDto01>)result;
    foreach (var item in weather001)
    {
        try
        {
            int v = 1;
            int v2 = 0;
            int ftemp = v / v2;
            logger.Info("Hello world");
            System.Console.ReadKey();
        }
        catch (Exception ex)
        {
            logger.Error(ex, "Goodbye cruel world");
        }

        logger.Info("asdfsadfasdf");

        logger.Debug("adfasdfasdf");
        System.Diagnostics.Trace.WriteLine("---------查看結果：" + item.GetType().GetProperty("Main").GetValue(item, null));
    }

2.2 Use

//創建logger
private static readonly NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();


// 在方法中使用
logger.Info("asdfsadfasdf");

logger.Debug("adfasdfasdf");

2.3 Extension

在编写程序的过程中，很难保证程序不会因为异常而退出，这时就需要将异常信息打印出来，方便查找问题的所在，所以需要在App.xaml.cs 中的CreateShell方法中订阅一些异常事件,并将这些异常信息打印到日志中

//----App.xaml.cs-----

private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
        
protected override Window CreateShell()
{
    //ui线程未捕获的异常
    DispatcherUnhandledException += OnDispatcherUnhandledException;
    //Task线程未捕获的异常
    TaskScheduler.UnobservedTaskException += OnUnobservedTaskException;
    //多线程异常
    AppDomain.CurrentDomain.UnhandledException += OnUnhandledException;
    
    return Container.Resolve<MainView>();
}


//上面的方法
private void OnDispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
{
    _logger.LogCritical($"{e.Exception.StackTrace},{e.Exception.Message}");
}

private void OnUnobservedTaskException(object? sender, UnobservedTaskExceptionEventArgs e)
{
    _logger.LogCritical($"{e.Exception.StackTrace},{e.Exception.Message}");
}

private void OnUnhandledException(object sender, UnhandledExceptionEventArgs e)
{
    Exception ex = e.ExceptionObject as Exception;
    _logger.LogCritical($"{ex.StackTrace},{ex.Message}");
}

2.4 Close

NLog.LogManager.Shutdown(); 

github.com/NLog/NLog/w…

3. Debug

3.1 BreakPoint

3.2 Console

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