无法正确配置 log4net

Question

我曾尝试通过代码配置 log4net，但当我将其用作 Logger.Info("new bar");:

时出现以下错误

at NinjaTrader.Indicator.Logger.Info(Object msg) in c:\Users\Documents\NinjaTrader 7\bin\Custom\Indicator\STSVer1.cs:line 610
at NinjaTrader.Indicator.STSVer1.OnBarUpdate() in c:\Users\Documents\NinjaTrader 7\bin\Custom\Indicator\STSVer1.cs:line 108
Object reference not set to an instance of an object.

public static class Logger
{
    private static log4net.ILog Log { get; set; }

    static Logger()
    { 
        Hierarchy hierarchy = (Hierarchy)LogManager.GetRepository();
        hierarchy.Root.RemoveAllAppenders(); /*Remove any other appenders*/

        FileAppender fileAppender = new FileAppender();
        fileAppender.AppendToFile = true;
        fileAppender.LockingModel = new FileAppender.MinimalLock();
        fileAppender.File = @"c:\temp\logevents.txt";
        PatternLayout pl = new PatternLayout();
        pl.ConversionPattern = "%d [%2%t] %-5p [%-10c]   %m%n%n";
        pl.ActivateOptions();
        fileAppender.Layout = pl;
        fileAppender.ActivateOptions();

        log4net.Config.BasicConfigurator.Configure(fileAppender);
        //Test logger
        ILog Log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);


    //      Log = log4net.LogManager.GetLogger(typeof(Logger));
    }

    public static void Error(object msg)
    {
        Log.Error(msg);
    }

    public static void Error(object msg, Exception ex)
    {
        Log.Error(msg, ex);
    }

    public static void Error(Exception ex)
    {
        Log.Error(ex.Message, ex);
    }

    public static void Info(object msg)
    {
        Log.Info(msg);
    }
}

Answer 1

在Logger-class静态构造函数中，你没有初始化属性Log，而是初始化了一个名为Log的新局部变量。因此，当您从 Info 方法内部调用它时，属性 Log 是 null。

从代码的以下行中删除类型名称 ILog。

ILog Log =LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

顺便说一句，您注释掉的正下方行做了正确的事情 - 关于正确初始化属性。

无法正确配置 log4net

cannot configure log4net correctly

c#

log4net