FileSystemWatcher类监控文件的更改状态并且实时备份文件

首先这是我自己在一个任务需求里面所要用到的，大致的代码如下：我把监视文件和备份文件的方法封装到一个WatcherAndBackup

类中了，但是总感觉封装的不是很好，有大牛能够指出改正之处在此留言，谢谢指点了哈!!,主要监视文件用到的类就是在sysytem.IO

里面的FileSystemWatcher，然后在一个控制台里面创建类WatcherAndBackup的实例并且运行就行

  class WatcherAndBackup
     {
         string sourcefile = "";//源文件
         string targetfile = "";//目标文件
         string targetPath = "";//目标路径
         public WatcherAndBackup(string Sourcefile,string Targetfile,string TargetPath)
         {
             sourcefile = Sourcefile;targetfile = Targetfile;targetPath = TargetPath;
         }

         public void backup(string sourcefile,string targetfile,string targetPath)
         {
             try
             {
                 if (!Directory.Exists(targetPath))
                 {
                     Directory.CreateDirectory(targetPath);

                 }
                 File.Copy(sourcefile, targetfile, true);

             }
             catch { }
         }
         #region 实时监视文件更改并且备份文件
         public void watcherfile(string path,string file)
         {
             FileSystemWatcher fsw = new FileSystemWatcher(path, file);
             fsw.Changed += new FileSystemEventHandler(change_watcher);
             fsw.Created += new FileSystemEventHandler(change_watcher);
             fsw.Deleted += new FileSystemEventHandler(change_watcher);
             fsw.Renamed += new RenamedEventHandler(rename_watcher);
             fsw.EnableRaisingEvents = true;
             Console.WriteLine("开始监视。。。。");
             fsw.NotifyFilter = NotifyFilters.Attributes | NotifyFilters.CreationTime | NotifyFilters.DirectoryName | NotifyFilters.FileName
                 | NotifyFilters.LastAccess | NotifyFilters.Security | NotifyFilters.Size | NotifyFilters.LastWrite;
             fsw.IncludeSubdirectories = true;
         }
         public void change_watcher(object sender,FileSystemEventArgs e)
         {

             var wacher = sender as FileSystemWatcher;
             wacher.EnableRaisingEvents = false;

             if (e.ChangeType==WatcherChangeTypes.Changed)
             {
                 Console.WriteLine("正在备份。。。");
                     backup(sourcefile,targetfile,targetPath);
                     Console.WriteLine("备份成功。。。");

             }
             else if (e.ChangeType==WatcherChangeTypes.Created)
             {
                 Console.WriteLine("{0},{1},{2}", e.ChangeType, e.FullPath, e.Name);
                 return;
             }
             else if (e.ChangeType==WatcherChangeTypes.Deleted)
             {
                 Console.WriteLine("{0},{1},{2}", e.ChangeType, e.FullPath, e.Name);
                 return;
             }
             wacher.EnableRaisingEvents = true;
         }
         public void rename_watcher(object sender,RenamedEventArgs e)
         {
             Console.WriteLine("{0},{1},{2}", e.ChangeType, e.FullPath, e.Name);
         }
         #endregion

     }

 static void Main(string[] args)
        {
            WatcherAndBackup bk = new WatcherAndBackup(@"D:\gg\config.xml", @"D:\gg\backup\config.xml", @"D:\gg\backup");
            bk.watcherfile(@"D:\gg", "config.xml");//监视的文件为D:\gg\config.xml
            Console.Read();
        }

　在这里解释一下：实例类WatcherAndBackup时分别要写下backup方法的三个参数：sourcefile、targefile、targePath，也就是备份方法的源文件、目标文件、目标文件的目录，然后在change_watcher方法当中为什么会有这几局代码：

var wacher=sender as FileSystemWatcher;

wacher.EnableRaisingEvents=false;

然后在方法后面：

wacher.EnableRaisingEvents=true;

其实如果不加入这几句代码会出现当监控到文件修改时会触发两次changed方法，这个修改方法是我在网上找到的一个修改方法

好了，基本也说完了。。。有什么不正确的地方请各位大牛指正，本就打着学习的态度写下的。。嘿嘿！！