使用 log4net Asp.net Core 2.2 将日志文件写入 AppData 不起作用

Question

我正在尝试将日志文件写入 AppData 位置，但它不起作用。我试过env%{AppData}，env%{APPDATA}，%APPDATA%，${AppData}，${APPDATA}，但没有人工作。如果我使用C:\Temp，它确实可以工作。

我使用 Asp.Net Core 2.2。和 log4net 2.08。

有什么建议吗？

<?xml version="1.0" encoding="utf-8" ?>
<log4net>
  <root>
    <level value="ALL" />
    <appender-ref ref="console" />
    <appender-ref ref="file" />
  </root>
  <appender name="console" type="log4net.Appender.ConsoleAppender">
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%-5level %date{dd-mm-yyyy HH:mm:ss} %logger [%thread] - %message %exception%newline" />
    </layout>
  </appender>
  <appender name="file" type="log4net.Appender.RollingFileAppender">
    <file value="${AppData}\MyApp\MyLogFile.log" />
    <appendToFile value="true" />
    <rollingStyle value="Size" />
    <maxSizeRollBackups value="5" />
    <maximumFileSize value="10MB" />
    <staticLogFileName value="true" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%-5level %date{dd-mm-yyyy HH:mm:ss} %logger [%thread] - %message %exception%newline" />
    </layout>
  </appender>
</log4net>

Answer 1

对于和我有同样问题的人：

Nuget（安装）：

log4net
Microsoft.Extensions.Options.ConfigurationExtensions
Microsoft.Extensions.Logging.Console
Microsoft.Extensions.Logging.Debug
Microsoft.Extensions.Logging.Log4Net.AspNetCore

AssemblyInfo.cs：

[assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config", Watch = true)]

appsettings.json：

"Log4NetConfigFile": {
    "Name": "log4net.config"
  },

程序.cs

---

using Microsoft.Extensions.Logging; //Had to write manually

public static void Main(string[] args)
        {
            var logRepo = LogManager.GetRepository(Assembly.GetEntryAssembly());
            log4net.GlobalContext.Properties["LogPath"] = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "MyApp");
            log4net.Config.XmlConfigurator.Configure(logRepo, new FileInfo("log4net.config"));

            CreateWebHostBuilder(args).Build().Run();
        }

public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
        .ConfigureLogging((webHostBuilderContext, loggingBuilder) =>
        {
            loggingBuilder.AddLog4Net();
        })
            .UseStartup<Startup>();
}

将 log4net.config 设置为复制到输出目录：始终复制

log4net.config：

<?xml version="1.0" encoding="utf-8" ?>
<log4net>
  <root>
    <level value="ALL" />
    <appender-ref ref="console" />
    <appender-ref ref="file" />
  </root>
  <appender name="console" type="log4net.Appender.ConsoleAppender">
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%-5level %date{dd-mm-yyyy HH:mm:ss} %logger [%thread] - %message %exception%newline" />
    </layout>
  </appender>
  <appender name="file" type="log4net.Appender.RollingFileAppender">
    <file type="log4net.Util.PatternString" value="%property{LogPath}\MyLogFile.log" />
    <appendToFile value="true" />
    <rollingStyle value="Size" />
    <maxSizeRollBackups value="5" />
    <maximumFileSize value="10MB" />
    <staticLogFileName value="true" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%-5level %date{dd-mm-yyyy HH:mm:ss} %logger [%thread] - %message %exception%newline" />
    </layout>
  </appender>
</log4net>

HomeController.cs

private static readonly log4net.ILog log = log4net.LogManager.GetLogger(typeof(HomeController));

public HomeController()
{
    log.Info("Starting GenerateDebugLog method...");
}