C# - NLog 为同一调用记录多行

Question

我开始使用 NLog，我想将每一行记录到一个日志文件和一个控制台中以用于调试目的。当我尝试记录每个日志操作时，在控制台和日志文件中都会打印 2-3 次，而不是在每个目标中打印一次。

我在 NLog.config 文件中配置了 NLog：

<?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">

  <targets>
    <target name="logfile" xsi:type="File" fileName="C:\Users\user\source\repos\TaskSchedulerConsole\Log.txt" />
    <target name="logconsole" xsi:type="Console" />
  </targets>

  <rules>
    <logger name="*" minlevel="Trace" writeTo="logfile, logconsole" />
    <logger name="*" minlevel="Debug" writeTo="logfile, logconsole" />
    <logger name="*" minlevel="Info" writeTo="logfile, logconsole" />
    <logger name="*" minlevel="Warn" writeTo="logfile, logconsole" />
    <logger name="*" minlevel="Error" writeTo="logfile, logconsole" />
    <logger name="*" minlevel="Fatal" writeTo="logfile, logconsole" />

  </rules>
</nlog>

在每个 class 中我创建了一个静态记录器：

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

三重日志记录示例： Program.cs:

            try
            {
                Logger.Info("Program Started.");

            }
            catch(Exception ex)
            {
                Logger.Info(ex, "Something went wrong...");
            }
            finally
            {
                Logger.Info("Program Finished.");
                NLog.LogManager.Shutdown();

            }

控制台和日志文件中的输出：

2020-05-14 11:49:44.7542|INFO|TaskSchedulerConsole.Program|Program Started.
2020-05-14 11:49:44.7542|INFO|TaskSchedulerConsole.Program|Program Started.
2020-05-14 11:49:44.7542|INFO|TaskSchedulerConsole.Program|Program Started.
2020-05-14 11:49:44.8315|INFO|TaskSchedulerConsole.Program|Program Finished.
2020-05-14 11:49:44.8315|INFO|TaskSchedulerConsole.Program|Program Finished.
2020-05-14 11:49:44.8315|INFO|TaskSchedulerConsole.Program|Program Finished.

在此先感谢大家，希望有人能帮助我理解问题。

Answer 1

这是正确的行为。

您为 NLog.config 配置了六个规则，这六个规则中的三个将在您的代码中触发。 (Trace/Debug/Info)

Answer 2

        <logger name="*" minlevel="Trace" writeTo="logfile" />
        <logger name="*" minlevel="Trace" writeTo="logconsole" />

应该足以记录每个级别条目一次

问题是您多次添加记录器，例如

    <logger name="*" minlevel="Trace" writeTo="logfile, logconsole" />
    <logger name="*" minlevel="Debug" writeTo="logfile, logconsole" />

添加两个记录器：一个用于从 Trace 开始的所有事件，第二个用于从 Debug 级别开始的所有级别。

Answer 3

1.nlog.config

    <?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"
      xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
      autoReload="true"
      throwExceptions="false"
      internalLogLevel="Off" internalLogFile="c:\temp\nlog-internal.log">

  <variable name="myvar" value="myvalue"/>
  <targets>
     <target name="logfile" xsi:type="File" fileName="log-dest\Log.txt" />
     <target name="logconsole" xsi:type="Console" />
  </targets>

  <rules>
    <logger name="*" minlevel="Info" writeTo="logfile, logconsole" />       
  </rules>
</nlog>

2.program.cs

class Program
{
    private static readonly NLog.Logger Logger = NLog.LogManager.GetCurrentClassLogger();
    static void Main(string[] args)
    {
        try
        {
            Logger.Info("Program Started.");
        }
        catch (Exception ex)
        {
            Logger.Error(ex, "Something went wrong...");
        }
        finally
        {
            Logger.Info("Program Finished.");
            NLog.LogManager.Shutdown();
        }
    }
}

3.result

C# - NLog 为同一调用记录多行

C# - NLog logs multiple lines for the same call

c#

logging

nlog