按设计 Log4Net 是
失败停止，我们的意思是 log4net 不会在运行时抛出意外异常，可能导致您的应用程序崩溃
所以很难弄清楚是什么导致了这个问题。
如何启用 log4net 内部调试？
来自常见问题 - http://logging.apache.org/log4net/release/faq.html
- 也可以通过在应用程序的配置文件中设置一个值来启用内部调试（不是 log4net 配置文件，除非 log4net 配置数据嵌入在应用程序的配置文件中）。log4net.Internal.Debug 应用程序设置必须设置为值 true。例如：
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<add key="log4net.Internal.Debug" value="true"/>
</appSettings>
</configuration>
此设置在启动时立即读取，并将导致发出所有内部调试消息。
- . 要以编程方式启用 log4net 的内部调试，您需要将log4net.Util.LogLog.InternalDebugging属性设置为 true。显然，设置得越早，产生的调试就越多。
所以这是我为 log4Net 创建的自定义类 - 因为配置文件非常混乱我创建了这个帮助类
- 您可以在应用程序中启动尽可能多的附加程序，因此如果一个 dll 调用另一个 dll 都可以启动附加程序，并且两个附加程序都可以工作。
- 您也可以关闭附加程序并（如文件附加程序）然后将其作为电子邮件发送
Log4NetFileHelper log = new Log4NetFileHelper();
log.Init(); //Initialize
log.AddConsoleLogging(); //Add Console Logging
log.AddFileLogging(Path.Combine(AssemblyDirectory, "BatchConsole.log"));
log.AddFileLogging(Path.Combine(AssemblyDirectory,"BatchConsole_error.log"),log4net.Core.Level.Error);
将此属性设置为 True log4net.Util.LogLog.InternalDebugging=true;
public class Log4NetFileHelper
{
private string DEFAULT_LOG_FILENAME=string.Format("application_log_{0}.log",DateTime.Now.ToString("yyyyMMMdd_hhmm"));
Logger root;
public Log4NetFileHelper()
{
}
public virtual void Init()
{
root = ((Hierarchy)LogManager.GetRepository()).Root;
//root.AddAppender(GetConsoleAppender());
//root.AddAppender(GetFileAppender(sFileName));
root.Repository.Configured = true;
}
#region Public Helper Methods
#region Console Logging
public virtual void AddConsoleLogging()
{
ConsoleAppender C = GetConsoleAppender();
AddConsoleLogging(C);
}
public virtual void AddConsoleLogging(ConsoleAppender C)
{
root.AddAppender(C);
}
#endregion
#region File Logging
public virtual FileAppender AddFileLogging()
{
return AddFileLogging(DEFAULT_LOG_FILENAME);
}
public virtual FileAppender AddFileLogging(string sFileFullPath)
{
return AddFileLogging(sFileFullPath, log4net.Core.Level.All);
}
public virtual FileAppender AddFileLogging(string sFileFullPath, log4net.Core.Level threshold)
{
return AddFileLogging(sFileFullPath, threshold,true);
}
public virtual FileAppender AddFileLogging(string sFileFullPath, log4net.Core.Level threshold, bool bAppendfile)
{
FileAppender appender = GetFileAppender(sFileFullPath, threshold , bAppendfile);
root.AddAppender(appender);
return appender;
}
public virtual SmtpAppender AddSMTPLogging(string smtpHost, string From, string To, string CC, string subject, log4net.Core.Level threshhold)
{
SmtpAppender appender = GetSMTPAppender(smtpHost, From, To, CC, subject, threshhold);
root.AddAppender(appender);
return appender;
}
#endregion
public log4net.Appender.IAppender GetLogAppender(string AppenderName)
{
AppenderCollection ac = ((log4net.Repository.Hierarchy.Hierarchy)LogManager.GetRepository()).Root.Appenders;
foreach(log4net.Appender.IAppender appender in ac){
if (appender.Name == AppenderName)
{
return appender;
}
}
return null;
}
public void CloseAppender(string AppenderName)
{
log4net.Appender.IAppender appender = GetLogAppender(AppenderName);
CloseAppender(appender);
}
private void CloseAppender(log4net.Appender.IAppender appender)
{
appender.Close();
}
#endregion
#region Private Methods
private SmtpAppender GetSMTPAppender(string smtpHost, string From, string To, string CC, string subject, log4net.Core.Level threshhold)
{
SmtpAppender lAppender = new SmtpAppender();
lAppender.Cc = CC;
lAppender.To = To;
lAppender.From = From;
lAppender.SmtpHost = smtpHost;
lAppender.Subject = subject;
lAppender.BufferSize = 512;
lAppender.Lossy = false;
lAppender.Layout = new
log4net.Layout.PatternLayout("%date{dd-MM-yyyy HH:mm:ss,fff} %5level [%2thread] %message (%logger{1}:%line)%n");
lAppender.Threshold = threshhold;
lAppender.ActivateOptions();
return lAppender;
}
private ConsoleAppender GetConsoleAppender()
{
ConsoleAppender lAppender = new ConsoleAppender();
lAppender.Name = "Console";
lAppender.Layout = new
log4net.Layout.PatternLayout(" %message %n");
lAppender.Threshold = log4net.Core.Level.All;
lAppender.ActivateOptions();
return lAppender;
}
/// <summary>
/// DETAILED Logging
/// log4net.Layout.PatternLayout("%date{dd-MM-yyyy HH:mm:ss,fff} %5level [%2thread] %message (%logger{1}:%line)%n");
///
/// </summary>
/// <param name="sFileName"></param>
/// <param name="threshhold"></param>
/// <returns></returns>
private FileAppender GetFileAppender(string sFileName , log4net.Core.Level threshhold ,bool bFileAppend)
{
FileAppender lAppender = new FileAppender();
lAppender.Name = sFileName;
lAppender.AppendToFile = bFileAppend;
lAppender.File = sFileName;
lAppender.Layout = new
log4net.Layout.PatternLayout("%date{dd-MM-yyyy HH:mm:ss,fff} %5level [%2thread] %message (%logger{1}:%line)%n");
lAppender.Threshold = threshhold;
lAppender.ActivateOptions();
return lAppender;
}
//private FileAppender GetFileAppender(string sFileName)
//{
// return GetFileAppender(sFileName, log4net.Core.Level.All,true);
//}
#endregion
private void ConfigureLog(string sFileName)
{
}
}