NLog类库使用探索——编程配置

以编程的方式配置，这是我项目中的，我都不知道为什么使用编程。直接配置不很好吗，估计他也没有研究。直接上步骤和代码：

1. 创建一个LoggingConfiguration对象，用来保存配置信息
2. 至少创建一个输出目标对象
3. 设置该输出目标对象的属性
4. 设置LoggingRule对象，并将其添加到LoggingConfiguration对象的LoggingRules集合中
5. 启用该LoggingConfiguration对象（将LogManager.Configuration设定为该LoggingConfiguration对象即可）

using NLog;
using NLog.Targets;
using NLog.Config;
using NLog.Win32.Targets; 

class Example
{
    static void Main(string[] args)
    {
        // Step 1. Create configuration object 

        LoggingConfiguration config = new LoggingConfiguration(); 

        // Step 2. Create targets and add them to the configuration 

        ColoredConsoleTarget consoleTarget = new ColoredConsoleTarget();
        config.AddTarget("console", consoleTarget); 

        FileTarget fileTarget = new FileTarget();
        config.AddTarget("file", fileTarget); 

        // Step 3. Set target properties 

        consoleTarget.Layout = "${date:format=HH\\:MM\\:ss} ${logger} ${message}";
        fileTarget.FileName = "${basedir}/file.txt";
        fileTarget.Layout = "${message}"; 

        // Step 4. Define rules 

        LoggingRule rule1 = new LoggingRule("*", LogLevel.Debug, consoleTarget);
        config.LoggingRules.Add(rule1); 

        LoggingRule rule2 = new LoggingRule("*", LogLevel.Debug, fileTarget);
        config.LoggingRules.Add(rule2); 

        // Step 5. Activate the configuration 

        LogManager.Configuration = config; 

        // Example usage 

        Logger logger = LogManager.GetLogger("Example");
        logger.Trace("trace log message");
        logger.Debug("debug log message");
        logger.Info("info log message");
        logger.Warn("warn log message");
        logger.Error("error log message");
        logger.Fatal("fatal log message");
    }
}