NLog:从nlog.config切换到编程配置

Question

以前我的ASP .NET MVC5应用程序使用nlog.config文件时错误日志记录工作得很好.现在我想摆脱配置文件的方法; 我想以编程方式配置Nlog并删除对配置文件的需要.这些示例很好地向我展示了如何以编程方式设置它,但我对如何实际调用配置类并实际实现它感到困惑.继承人我所拥有的:

protected void Application_Error(object sender, EventArgs e)
    {
        Exception ex = Server.GetLastError();
        NALSPrincipal userInfo = (NALSPrincipal)Context.User;

        // Step 1. Create configuration object 
        var config = new LoggingConfiguration();

        // Step 2. Create targets and add them to the configuration 
        var fileTarget = new FileTarget();
        config.AddTarget("file", fileTarget);

        // Step 3. Set target properties 
        fileTarget.FileName = "C:/nlogFile.txt";
        fileTarget.Layout = "Exception Type: ${exception:format=Type}${newline}
                             Target Site:  ${event-context:TargetSite}${newline}
                             Message: ${message}";

        // Step 4. Define rules
        var rule2 = new LoggingRule("*", LogLevel.Trace, fileTarget);
        config.LoggingRules.Add(rule2);

        // Step 5. Activate the configuration
        LogManager.Configuration = config;

        Logger logger = LogManager.GetCurrentClassLogger();
        LogEventInfo eventInfo = new LogEventInfo(LogLevel.Trace, "", logger.Name);
        eventInfo.Properties["TargetSite"] = ex.TargetSite;
        eventInfo.Exception = ex;
        logger.Log(eventInfo);      
    }

有谁知道这不起作用？以下是基于以下内容的文档:https: //github.com/nlog/NLog/wiki/Configuration-API

如果它有帮助,这是我在使用nlog.config文件时所得到的,它工作正常:

protected void Application_Error(object sender, EventArgs e)
    {
        Exception ex = Server.GetLastError();
        NALSPrincipal userInfo = (NALSPrincipal)Context.User;
        Logger logger = LogManager.GetCurrentClassLogger();
        LogEventInfo eventInfo = new LogEventInfo(LogLevel.Trace, "", logger.Name);
        eventInfo.Properties["CUID"] = userInfo.userDetails.ContactID;
        eventInfo.Properties["Username"] = Context.User.Identity.Name;
        eventInfo.Properties["TargetSite"] = ex.TargetSite;
        eventInfo.Exception = ex;
        logger.Log(eventInfo);     
    }

任何帮助非常感谢!谢谢!

Answer 1

您是否以足够的权限运行应用程序以在 C 驱动器根目录中写入日志文件？使用 ${basedir}/nLogFile.txt 尝试一下，看看是否有效。