常见的.使用PostSharp和NLog 2.0进行日志记录

本文关键字：日志 记录 NLog 使用 PostSharp 常见 | 更新日期: 2023-09-27 17:54:24

我使用Common。日志作为NLog 2.0的包装。我这样做是为了将来可以用另一个日志提供者替换NLog。

我还使用PostSharp来避免每次需要时都编写try catch块。我有一个类继承了OnMethodBoundaryAspect:

[Serializable]
public class LogMethodAttribute : OnMethodBoundaryAspect
{
    private ILog logger;
    public LogMethodAttribute()
    {
        this.logger = LogManager.GetCurrentClassLogger();
    }
    public override void OnEntry(MethodExecutionArgs args)
    {
        logger.Debug(string.Format("Entering {0}.{1}.", args.Method.DeclaringType.Name, args.Method.Name));
    }
    public override void OnExit(MethodExecutionArgs args)
    {
        logger.Debug(string.Format("Leaving {0}.{1}.", args.Method.DeclaringType.Name, args.Method.Name));
    }
    public override void OnException(MethodExecutionArgs args)
    {
        logger.Error(args.Exception.Message,args.Exception);
    }
}

我已经配置了"普通"。在我的web.config中记录如下:

<configSections>
<sectionGroup name="common">
  <section name="logging" type="Common.Logging.ConfigurationSectionHandler, Common.Logging" />
</sectionGroup>
</configSections>
<common>
<logging>
  <factoryAdapter type="Common.Logging.NLog.NLogLoggerFactoryAdapter, Common.Logging.NLog20">
    <arg key="configType" value="FILE" />
    <arg key="configFile" value="~/NLog.config" />
  </factoryAdapter>
</logging>
</common>

NLog。配置如下:

<?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"
  throwExceptions="true"
  internalLogLevel="Debug"
  internalLogToConsoleError="true"
  internalLogFile="c:'new projects/nlog-app.txt"
>
<!-- 
See http://nlog-project.org/wiki/Configuration_file 
for information on customizing logging rules and outputs.
 -->
<targets>
<target name="database"
        xsi:type="Database"
        commandText="INSERT INTO LogEvent(EventDateTime, EventLevel, UserName, MachineName, EventMessage, ErrorSource, ErrorClass, ErrorMethod, ErrorMessage, InnerErrorMessage) VALUES(@EventDateTime, @EventLevel, @UserName, @MachineName, @EventMessage, @ErrorSource, @ErrorClass, @ErrorMethod, @ErrorMessage, @InnerErrorMessage)"
        dbProvider="System.Data.SqlClient">
  <connectionString>
    Data Source=...;Initial Catalog=myDB;User Id=user;Password=pass;
  </connectionString>
  <installConnectionString>
     Data Source=...;Initial Catalog=myDB;User Id=user;Password=pass;
  </installConnectionString>
    <!-- parameters for the command -->
  <parameter name="@EventDateTime" layout="${date:s}" />
  <parameter name="@EventLevel" layout="${level}" />
  <parameter name="@UserName" layout="${identity}" />
  <parameter name="@MachineName" layout="${machinename}" />
  <parameter name="@EventMessage" layout="${message}" />
  <parameter name="@ErrorSource" layout="${event-context:item=error-source}" />
  <parameter name="@ErrorClass" layout="${event-context:item=error-class}" />
  <parameter name="@ErrorMethod" layout="${event-context:item=error-method}" />
  <parameter name="@ErrorMessage" layout="${event-context:item=error-message}" />
  <parameter name="@InnerErrorMessage" layout="${event-context:item=inner-error-message}" />
  <!-- commands to install database -->
  <install-command>
    <text>CREATE DATABASE myDB</text>
    <connectionString> Data Source=...;Initial Catalog=myDB;User Id=user;Password=pass;</connectionString>
    <ignoreFailures>true</ignoreFailures>
  </install-command>
  <install-command>
    <text>
      CREATE TABLE LogEvent(
      EventId int primary key not null identity(1,1),
      EventDateTime datetime,
      EventLevel nvarchar(50),
      UserName nvarchar(50),
      MachineName nvarchar(1024),
      EventMessage nvarchar(MAX),
      ErrorSource nvarchar(1024),
      ErrorClass nvarchar(1024),
      ErrorMethod nvarchar(1024),
      ErrorMessage nvarchar(MAX),
      InnerErrorMessage nvarchar(MAX));
    </text>
  </install-command>
  <!-- commands to uninstall database -->
  <uninstall-command>
    <text>DROP DATABASE myDB</text>
    <connectionString> Data Source=...;Initial Catalog=myDB;User Id=user;Password=pass;</connectionString>
    <ignoreFailures>true</ignoreFailures>
  </uninstall-command>
</target>
</targets>
<rules>
<logger name="*" levels="Error" writeTo="database" />
</rules>
</nlog>

问题是没有任何东西插入到我的表中。当我在索引页上放一个记录器比如我的HomeController我调用记录器。错误("一个错误")，它添加一个记录到我的表。

有人能帮我吗?

常见的.使用PostSharp和NLog 2.0进行日志记录

您是否使用您创建的LogMethodAttribute来装饰您的控制器方法?

另外，你需要调整你的日志规则，以包括更多的级别，而不仅仅是"Error"，否则你将记录所有的日志。

试一试:

<rules>
<logger name="*" minLevel="Trace" writeTo="database" />
</rules>
编辑:

您是否尝试将记录器初始化移动到您的方法中?

public override void OnEntry(MethodExecutionArgs args)
{
     this.logger = LogManager.GetCurrentClassLogger();
     logger.Debug(string.Format("Entering {0}.{1}.", args.Method.DeclaringType.Name, args.Method.Name));
}

根据Donald belham的Pluralsight课程，方面构造函数不会在运行时执行，所以可能您的记录器没有正确设置。

在类Aspect中添加一个静态属性记录器

public class LogAspect : OnMethodBoundaryAspect
{
    /// <summary>
    /// Gets or sets the logger.
    /// </summary>
    public static ILogger logger { get; set; }

使用ILogger类在应用程序初始化方法中设置logger变量，并使用AttributeExclude排除初始化之前的所有方法。

    [LogAspect(AttributeExclude = true)]
    protected void Application_Start()
    {
        _windsorContainer = new WindsorContainer();
        ApplicationDependencyInstaller.RegisterLoggingFacility(_windsorContainer);
        LogAspect.logger = _windsorContainer.Resolve<ILogger>();
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