如果您的DLL只是您計劃在各種項目之間共享的核心庫,那麼可以明智地將NLog引用和包裝代碼添加到該庫中,然後確保任何使用者應用程序(例如您的WPF項目)有一個與之關聯的NLog.config文件。
由於您使用的是VS2012,我假設您也很可能使用.NET 4.5,它可以讓您利用新的調用者信息屬性。我已經爲基本的NLog包裝器編寫了下面的代碼,並相信它具有效率(不使用StackTrace)和可用性的完美平衡。
using System;
using System.Runtime.CompilerServices;
using NLog;
namespace ProjectName.Core.Utilities
{
/// <summary>
/// Generic NLog wrapper.
/// </summary>
public static class Logger
{
/// <summary>
/// Gets or sets the enabled status of the logger.
/// </summary>
public static bool Enabled
{
get { return LogManager.IsLoggingEnabled(); }
set
{
if (value)
{
while (!Enabled) LogManager.EnableLogging();
}
else
{
while (Enabled) LogManager.DisableLogging();
}
}
}
/// <summary>
/// Writes the diagnostic message at the Trace level.
/// </summary>
/// <param name="message"></param>
/// <param name="exception"></param>
/// <param name="callerPath"></param>
/// <param name="callerMember"></param>
/// <param name="callerLine"></param>
public static void Trace(string message, Exception exception = null,
[CallerFilePath] string callerPath = "",
[CallerMemberName] string callerMember = "",
[CallerLineNumber] int callerLine = 0)
{
Log(LogLevel.Trace, message, exception, callerPath, callerMember, callerLine);
}
/// <summary>
/// Writes the diagnostic message at the Debug level.
/// </summary>
/// <param name="message"></param>
/// <param name="exception"></param>
/// <param name="callerPath"></param>
/// <param name="callerMember"></param>
/// <param name="callerLine"></param>
public static void Debug(string message, Exception exception = null,
[CallerFilePathAttribute] string callerPath = "",
[CallerMemberName] string callerMember = "",
[CallerLineNumber] int callerLine = 0)
{
Log(LogLevel.Debug, message, exception, callerPath, callerMember, callerLine);
}
/// <summary>
/// Writes the diagnostic message at the Info level.
/// </summary>
/// <param name="message"></param>
/// <param name="exception"></param>
/// <param name="callerPath"></param>
/// <param name="callerMember"></param>
/// <param name="callerLine"></param>
public static void Info(string message, Exception exception = null,
[CallerFilePathAttribute] string callerPath = "",
[CallerMemberName] string callerMember = "",
[CallerLineNumber] int callerLine = 0)
{
Log(LogLevel.Info, message, exception, callerPath, callerMember, callerLine);
}
/// <summary>
/// Writes the diagnostic message at the Warn level.
/// </summary>
/// <param name="message"></param>
/// <param name="exception"></param>
/// <param name="callerPath"></param>
/// <param name="callerMember"></param>
/// <param name="callerLine"></param>
public static void Warn(string message, Exception exception = null,
[CallerFilePathAttribute] string callerPath = "",
[CallerMemberName] string callerMember = "",
[CallerLineNumber] int callerLine = 0)
{
Log(LogLevel.Warn, message, exception, callerPath, callerMember, callerLine);
}
/// <summary>
/// Writes the diagnostic message at the Error level.
/// </summary>
/// <param name="message"></param>
/// <param name="exception"></param>
/// <param name="callerPath"></param>
/// <param name="callerMember"></param>
/// <param name="callerLine"></param>
public static void Error(string message, Exception exception = null,
[CallerFilePathAttribute] string callerPath = "",
[CallerMemberName] string callerMember = "",
[CallerLineNumber] int callerLine = 0)
{
Log(LogLevel.Error, message, exception, callerPath, callerMember, callerLine);
}
/// <summary>
/// Writes the diagnostic message at the Fatal level.
/// </summary>
/// <param name="message"></param>
/// <param name="exception"></param>
/// <param name="callerPath"></param>
/// <param name="callerMember"></param>
/// <param name="callerLine"></param>
public static void Fatal(string message, Exception exception = null,
[CallerFilePathAttribute] string callerPath = "",
[CallerMemberName] string callerMember = "",
[CallerLineNumber] int callerLine = 0)
{
Log(LogLevel.Fatal, message, exception, callerPath, callerMember, callerLine);
}
/// <summary>
/// Writes the specified diagnostic message.
/// </summary>
/// <param name="level"></param>
/// <param name="message"></param>
/// <param name="exception"></param>
/// <param name="callerPath"></param>
/// <param name="callerMember"></param>
/// <param name="callerLine"></param>
private static void Log(LogLevel level, string message, Exception exception = null, string callerPath = "", string callerMember = "", int callerLine = 0)
{
// get the source-file-specific logger
var logger = LogManager.GetLogger(callerPath);
// quit processing any further if not enabled for the requested logging level
if (!logger.IsEnabled(level)) return;
// log the event with caller information bound to it
var logEvent = new LogEventInfo(level, callerPath, message) {Exception = exception};
logEvent.Properties.Add("callerpath", callerPath);
logEvent.Properties.Add("callermember", callerMember);
logEvent.Properties.Add("callerline", callerLine);
logger.Log(logEvent);
}
}
}
然後嘗試將其放入NLog.config中的其中一個目標的佈局字段以獲取詳細的來電者信息。
${event-context:item=callerpath}:${event-context:item=callermember}(${event-context:item=callerline})
讓它像現在這樣,我會說。每個想要使用它的程序集只有一個DLL副本。如果使用該DLL的可執行程序集引用(說)兩個其他類庫程序集也使用該DLL,那麼您將*只*得到可執行程序集的輸出文件夾中的一個DLL。 – 2013-03-12 08:45:06