【.NET / C#】NLogHelper

public sealed class LogHelper
{
    /// <summary>
    /// 输出 ERROR 日志
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="message">文本消息</param>
    public static void Error(Logger logger, string message, 
            [CallerMemberName] string memberName = "",
            [CallerFilePath] string sourceFilePath = "", 
            [CallerLineNumber] int sourceLineNumber = 0)
    {
        Log(logger, LogLevel.Error, message, memberName, sourceFilePath, sourceLineNumber);
    }

    /// <summary>
    /// 输出 ERROR 日志
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="message">异常消息</param>
    public static void Error(Logger logger, Exception throwable,
            [CallerMemberName] string memberName = "",
            [CallerFilePath] string sourceFilePath = "",
            [CallerLineNumber] int sourceLineNumber = 0)
    {
        Log(logger, LogLevel.Error, throwable, memberName, sourceFilePath, sourceLineNumber);
    }

    /// <summary>
    /// 输出 WARN 日志
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="message">文本消息</param>
    public static void Warn(Logger logger, string message,
            [CallerMemberName] string memberName = "",
            [CallerFilePath] string sourceFilePath = "",
            [CallerLineNumber] int sourceLineNumber = 0)
    {
        Log(logger, LogLevel.Warn, message, memberName, sourceFilePath, sourceLineNumber);
    }

    /// <summary>
    /// 输出 WARN 日志
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="message">异常消息</param>
    public static void Warn(Logger logger, Exception throwable,
            [CallerMemberName] string memberName = "",
            [CallerFilePath] string sourceFilePath = "",
            [CallerLineNumber] int sourceLineNumber = 0)
    {
        Log(logger, LogLevel.Warn, throwable, memberName, sourceFilePath, sourceLineNumber);
    }

    /// <summary>
    /// 输出 INFO 日志
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="message">文本消息</param>
    public static void Info(Logger logger, string message,
            [CallerMemberName] string memberName = "",
            [CallerFilePath] string sourceFilePath = "",
            [CallerLineNumber] int sourceLineNumber = 0)
    {
        Log(logger, LogLevel.Info, message, memberName, sourceFilePath, sourceLineNumber);
    }

    /// <summary>
    /// 输出 INFO 日志
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="message">异常消息</param>
    public static void Info(Logger logger, Exception throwable,
            [CallerMemberName] string memberName = "",
            [CallerFilePath] string sourceFilePath = "",
            [CallerLineNumber] int sourceLineNumber = 0)
    {
        Log(logger, LogLevel.Info, throwable, memberName, sourceFilePath, sourceLineNumber);
    }

    /// <summary>
    /// 输出 DEBUG 日志
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="message">文本消息</param>
    public static void Debug(Logger logger, string message,
            [CallerMemberName] string memberName = "",
            [CallerFilePath] string sourceFilePath = "",
            [CallerLineNumber] int sourceLineNumber = 0)
    {
        Log(logger, LogLevel.Debug, message, memberName, sourceFilePath, sourceLineNumber);
    }

    /// <summary>
    /// 输出 DEBUG 日志
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="message">异常消息</param>
    public static void Debug(Logger logger, Exception throwable,
            [CallerMemberName] string memberName = "",
            [CallerFilePath] string sourceFilePath = "",
            [CallerLineNumber] int sourceLineNumber = 0)
    {
        Log(logger, LogLevel.Debug, throwable, memberName, sourceFilePath, sourceLineNumber);
    }

    /// <summary>
    /// 输出 TRACE 日志
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="message">文本消息</param>
    public static void Trace(Logger logger, string message,
            [CallerMemberName] string memberName = "",
            [CallerFilePath] string sourceFilePath = "",
            [CallerLineNumber] int sourceLineNumber = 0)
    {
        Log(logger, LogLevel.Trace, message, memberName, sourceFilePath, sourceLineNumber);
    }

    /// <summary>
    /// 输出 TRACE 日志
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="message">异常消息</param>
    public static void Trace(Logger logger, Exception throwable,
            [CallerMemberName] string memberName = "",
            [CallerFilePath] string sourceFilePath = "",
            [CallerLineNumber] int sourceLineNumber = 0)
    {
        Log(logger, LogLevel.Trace, throwable, memberName, sourceFilePath, sourceLineNumber);
    }

    // --------------------------------------------------------------------------------------------

    /// <summary>
    /// 日志输出
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="level">日志级别</param>
    /// <param name="message">文本消息</param>
    /// <param name="memberName">方法名</param>
    /// <param name="sourceFilePath">文件</param>
    /// <param name="sourceLineNumber">行号</param>
    private static void Log(Logger logger, LogLevel level, string message, 
             string memberName, string sourceFilePath, int sourceLineNumber)
    {
        if (logger.IsEnabled(level))
        {
            // logger.Log(level, "[SEGMENT4| {}] [SEGMENT5| _] [SEGMENT6| {}]", caller, message);
            var caller = GetCaller(memberName, sourceFilePath, sourceLineNumber);
            logger.Log(level, "[{0}] [_] [{1}]", caller, message);
        }
    }

    /// <summary>
    /// 日志输出
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="level">日志级别</param>
    /// <param name="throwable">异常消息</param>
    /// <param name="memberName">方法名</param>
    /// <param name="sourceFilePath">文件</param>
    /// <param name="sourceLineNumber">行号</param>
    private static void Log(Logger logger, LogLevel level, Exception throwable, 
             string memberName, string sourceFilePath, int sourceLineNumber)
    {
        if (logger.IsEnabled(level))
        {
            // logger.Log(level, "[SEGMENT4| {}] [SEGMENT5| _] [SEGMENT6| {}]", caller, message);
            var caller = GetCaller(memberName, sourceFilePath, sourceLineNumber);
            var message = GetExceptionInfo(throwable);
            logger.Log(level, "[{0}] [_] [{1}]", caller, message);
        }
    }

    /// <summary>
    /// 获取调用者信息
    /// </summary>
    /// <param name="memberName">方法名</param>
    /// <param name="sourceFilePath">文件</param>
    /// <param name="sourceLineNumber">行号</param>
    /// <returns></returns>
    private static string GetCaller(string memberName, string sourceFilePath, int sourceLineNumber)
    {
        var source = string.IsNullOrEmpty(sourceFilePath) 
                   ? string.Empty 
                   : sourceFilePath.Substring(sourceFilePath.LastIndexOf('\') + 1);
        return $"{memberName ?? string.Empty}({source}:{sourceLineNumber})";
    }

    /// <summary>
    /// 获取详细的异常描述
    /// </summary>
    /// <param name="ex">Exception</param>
    /// <returns></returns>
    private static string GetExceptionInfo(Exception ex)
    {
        if (ex == null) return string.Empty;
        var message = new StringBuilder(ex.Message);
        while (ex.InnerException != null)
        {
            ex = ex.InnerException;
            message.AppendFormat(" => {0}", ex.ToString());
        }
        return message.ToString();
    }

}