.NET 日志系统设计思路及实现代码

/// <summary>
    /// 日志等级
    /// </summary>
    public enum Loglevel
    {
        Track=1,
        Bug,
        Error
    }

public interface ILogTarget
    {
        /// <summary>
        /// 写入追踪信息
        /// </summary>
        /// <param name="LogContent"></param>
        void WriteTrack(string LogContent);

        /// <summary>
        /// 写入BUG信息
        /// </summary>
        /// <param name="LogContent"></param>
        void WriteBug(string LogContent);

        /// <summary>
        /// 写入错误信息
        /// </summary>
        /// <param name="LogContent"></param>
        void WriteError(string LogContent);

    }

/// <summary>
    /// 文件日志实现类
    /// </summary>
    public class FileLog : ILogTarget
    {
        public void WriteTrack(string LogContent)
        {
            throw new NotImplementedException();
        }

        public void WriteBug(string LogContent)
        {
            throw new NotImplementedException();
        }

        public void WriteError(string LogContent)
        {
            throw new NotImplementedException();
        }
    }

public class DBLog : ILogTarget
    {
        public void WriteTrack(string LogContent)
        {
            throw new NotImplementedException();
        }

        public void WriteBug(string LogContent)
        {
            throw new NotImplementedException();
        }

        public void WriteError(string LogContent)
        {
            throw new NotImplementedException();
        }
    }

public class SmartLog
    {
        private ILogTarget _adaptee;

        public SmartLog(ILogTarget tragent)
        {
            this._adaptee = tragent;
        }
        public void WriteTrack(string LogContent)
        {
            _adaptee.WriteTrack(LogContent);
        }

        public void WriteBug(string LogContent)
        {
            _adaptee.WriteBug(LogContent);
        }

        public void WriteError(string LogContent)
        {
            _adaptee.WriteError(LogContent);
        }
    }

SmartLog log =new SmartLog (new FileLog());

log.WriteTrack("Hello word");