在 C# 中获取 log4net 日志文件
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Get log4net log file in C#
提问by Carlo
This is my configuration for log4net:
这是我对 log4net 的配置：
<log4net>
<appender name="MyLogger" type="log4net.Appender.RollingFileAppender">
<file value="MyLog.log" />
<appendToFile value="true" />
<rollingStyle value="Size"/>
<maxSizeRollBackups value="20"/>
<maximumFileSize value="1000KB"/>
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss},%p,%m%n" />
</layout>
</appender>
<root>
<level value="DEBUG" />
<appender-ref ref="MyLogger" />
</root>
</log4net>
In C# I'm trying to get the name of the log file (which is MyLog.log). I googled and tried many things but failed to do so. Any help?
在 C# 中，我试图获取日志文件的名称（即 MyLog.log）。我用谷歌搜索并尝试了很多东西，但没有这样做。有什么帮助吗？
Thanks!
谢谢！
采纳答案by Yakeen
Solution is quite easy in your situation; just use this code:
在您的情况下，解决方案很容易；只需使用此代码：
var rootAppender = ((Hierarchy)LogManager.GetRepository())
.Root.Appenders.OfType<FileAppender>()
.FirstOrDefault();
string filename = rootAppender != null ? rootAppender.File : string.Empty;
回答by Jyo Reddy
I didn't find the above code working. This worked for me
我没有发现上面的代码有效。这对我有用
var filename= ((log4net.Appender.FileAppender)(((log4net.Appender.IAppender[])((((((log4net.Repository.Hierarchy.Hierarchy)((((log4net.Core.LoggerWrapperImpl)(log)).Logger).Repository)).Root).Hierarchy.Root).Appenders).SyncRoot))[0])).File
回答by stevieg
If your config does not have a <root> node then the above solution will not work for you. Read on.
如果您的配置没有 <root> 节点，则上述解决方案对您不起作用。继续阅读。
<log4net>
<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
<file value="${LOCALAPPDATA}\Anonymous.log" />
<appendToFile value="true" />
<rollingStyle value="Size" />
<maxSizeRollBackups value="10" />
<maximumFileSize value="2000KB" />
<staticLogFileName value="true" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
</layout>
</appender>
<logger name="AnonymousLog">
<level value="All" />
<appender-ref ref="RollingFileAppender" />
</logger>
</log4net>
This retrieves the log file:
这将检索日志文件：
string path = (LogManager.GetCurrentLoggers()[0].Logger.Repository.GetAppenders()[0] as FileAppender).File;
The (hopefully) crash-proof version:
（希望）防撞版本：
string path = null;
if (LogManager.GetCurrentLoggers().Length > 0 && LogManager.GetCurrentLoggers()[0].Logger.Repository.GetAppenders().Length > 0)
{
path = (LogManager.GetCurrentLoggers()[0].Logger.Repository.GetAppenders()[0] as FileAppender).File;
}
Finally, if you get stuck with log4net add this to your <appSettings> section:
最后，如果您在使用 log4net 时遇到困难，请将其添加到您的 <appSettings> 部分：
<add key="log4net.Internal.Debug" value="true"/>
回答by N5ARW
Since I already had a logger defined in the class I just used it. One thing to be aware of is that there may be more than one appender and often the first one is the console (which doesn't have a file). Here is my solution for what its worth.
因为我已经在类中定义了一个记录器，所以我刚刚使用了它。需要注意的一件事是可能有多个附加程序，通常第一个是控制台（没有文件）。这是我的解决方案。
using log4net;
using log4net.Appender;
using log4net.Repository;
namespace MyNameSpace {
public class MyClass {
private static readonly ILog logger = LogManager.GetLogger(typeof(MyClass));
public String GetLogFileName() {
String filename = null;
IAppender[] appenders = logger.Logger.Repository.GetAppenders();
// Check each appender this logger has
foreach (IAppender appender in appenders) {
Type t = appender.GetType();
// Get the file name from the first FileAppender found and return
if (t.Equals(typeof(FileAppender)) || t.Equals(typeof(RollingFileAppender))) {
filename = ((FileAppender)appender).File;
break;
}
}
return filename;
}
}
}
}
回答by Andrey Prokhorov
String filename = null;
Hierarchy hierarchy = LogManager.GetRepository() as Hierarchy;
Logger logger = hierarchy.Root;
IAppender[] appenders = logger.Repository.GetAppenders();
// Check each appender this logger has
foreach (IAppender appender in appenders)
{
Type t = appender.GetType();
// Get the file name from the first FileAppender found and return
if (t.Equals(typeof(FileAppender)) || t.Equals(typeof(RollingFileAppender)))
{
filename = ((FileAppender)appender).File;
break;
}
}
System.Diagnostics.Process.Start(filename); //for example, open file in notepad
回答by falstaff
When having multiple file appenders, you might want to get them by name. Also to make sure to get the appender even if it is not referenced by the root node, the following code helps:
当有多个文件附加程序时，您可能希望按名称获取它们。此外，为了确保即使根节点未引用 appender，也能获取 appender，以下代码有帮助：
public static string GetLogFileName(string name)
{
var rootAppender = LogManager.GetRepository()
.GetAppenders()
.OfType<FileAppender>()
.FirstOrDefault(fa => fa.Name == name);
return rootAppender != null ? rootAppender.File : string.Empty;
}
回答by Matheus de Lara Calache
((log4net.Appender.FileAppender)(_log.Logger.Repository.GetAppenders())[0]).File
