我想为现有日志消息上的所有消息添加类别前缀.但是,将此前缀逐个添加到所有现有日志记录消息中非常繁琐.有没有办法可以在类级别添加一个属性,那么这个类中的所有消息都会记录到某个类别？
而不是现在的方式如下,
Log.Info("[Ref] Level 1 Starts ...");
我真的想要这样或类似的方式来定义log4net.ILog.
[LoggingCategory("Ref")]
public class MyClass
{
public void MyMethod()
{
Log.Info("Level 1 Starts ...");
}
}
解决方法
有趣的问题,粗略的尝试……
Log4NetLogger – 日志适配器
public class Log4NetLogger
{
private readonly ILog _logger;
private readonly string _category;
public Log4NetLogger(Type type)
{
_logger = LogManager.GetLogger(type);
_category = GetCategory();
}
private string GetCategory()
{
var attributes = new StackFrame(2).GetMethod().DeclaringType.GetCustomAttributes(typeof(LoggingCategoryAttribute),false);
if (attributes.Length == 1)
{
var attr = (LoggingCategoryAttribute)attributes[0];
return attr.Category;
}
return string.Empty;
}
public void Debug(string message)
{
if(_logger.IsDebugEnabled) _logger.Debug(string.Format("[{0}] {1}",_category,message));
}
}
LoggingCategoryAttribute – 适用于类
[AttributeUsage(AttributeTargets.Class)]
public class LoggingCategoryAttribute : Attribute
{
private readonly string _category;
public LoggingCategoryAttribute(string category)
{
_category = category;
}
public string Category { get { return _category; } }
}
LogTester – 一个测试实现
[LoggingCategory("LT")]
public class LogTester
{
private static readonly Log4NetLogger Logger = new Log4NetLogger(typeof(LogTester));
public void Test()
{
Logger.Debug("This log message should have a prepended category");
}
}
