轉自：C# 實現監控文件夾和里面文件的變化 - 秋天的林子 - 博客園 (cnblogs.com)
描述：
- FileSystemWatcher位於System.IO;
- 命名空間下面，想要使用它必須先引用System.IO;
下面的例子使用了FileSystemWatcher來監控C盤文件的變化，因為這個目錄的變化是最頻繁的，運行程序打開瀏覽器可以看到很頻繁的臨時文件創建，需要注意的是：
- 添加文件或文件夾時，會觸發Created事件，然后修改默認文件夾或文件名稱再觸發Changed事件。
- 復制或移動文件夾文件時則是觸發Created事件。
- 刪除文件夾或文件時觸發Deleted事件。
下面是整個例子的代碼，可以建一個空的控制台應用程序復制粘貼就能運行了：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
namespace HelloCsharp
{
class Program
{
static void Main(string[] args)
{
FileListenerServer f1 = new FileListenerServer(@"c:\");
f1.Start();
Console.ReadKey();
}
}
public class FileListenerServer
{
private FileSystemWatcher _watcher;
public FileListenerServer()
{
}
public FileListenerServer(string path)
{
try
{
this._watcher = new FileSystemWatcher();
_watcher.Path = path;
_watcher.NotifyFilter = NotifyFilters.FileName | NotifyFilters.Size | NotifyFilters.DirectoryName;
_watcher.IncludeSubdirectories = true;
_watcher.Created += new FileSystemEventHandler(FileWatcher_Created);
_watcher.Changed += new FileSystemEventHandler(FileWatcher_Changed);
_watcher.Deleted += new FileSystemEventHandler(FileWatcher_Deleted);
_watcher.Renamed += new RenamedEventHandler(FileWatcher_Renamed);
}
catch (Exception ex)
{
Console.WriteLine("Error:" + ex.Message);
}
}
public void Start()
{
this._watcher.EnableRaisingEvents = true;
Console.WriteLine("文件監控已經啟動...");
}
public void Stop()
{
this._watcher.EnableRaisingEvents = false;
this._watcher.Dispose();
this._watcher = null;
}
protected void FileWatcher_Created(object sender, FileSystemEventArgs e)
{
Console.WriteLine("新增:" + e.ChangeType + ";" + e.FullPath + ";" + e.Name);
}
protected void FileWatcher_Changed(object sender, FileSystemEventArgs e)
{
Console.WriteLine("變更:" + e.ChangeType + ";" + e.FullPath + ";" + e.Name);
}
protected void FileWatcher_Deleted(object sender, FileSystemEventArgs e)
{
Console.WriteLine("刪除:" + e.ChangeType + ";" + e.FullPath + ";" + e.Name);
}
protected void FileWatcher_Renamed(object sender, RenamedEventArgs e)
{
Console.WriteLine("重命名: OldPath:{0} NewPath:{1} OldFileName{2} NewFileName:{3}", e.OldFullPath, e.FullPath, e.OldName, e.Name);
}
}
}
更改監聽配置信息：
1 private static void WatcherStrat(string StrWarcherPath, string FilterType, bool IsEnableRaising, bool IsInclude) 2 { 3 //初始化監聽 4 watcher.BeginInit(); 5 //設置監聽文件類型 6 watcher.Filter = FilterType; 7 //設置是否監聽子目錄 8 watcher.IncludeSubdirectories = IsInclude; 9 //設置是否啟用監聽? 10 watcher.EnableRaisingEvents = IsEnableRaising; 11 //設置需要監聽的更改類型(如:文件或者文件夾的屬性,文件或者文件夾的創建時間;NotifyFilters枚舉的內容) 12 watcher.NotifyFilter = NotifyFilters.Attributes | NotifyFilters.CreationTime | NotifyFilters.DirectoryName | NotifyFilters.FileName | NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.Security | NotifyFilters.Size; 13 //設置監聽的路徑 14 watcher.Path = StrWarcherPath; 15 //注冊創建文件或目錄時的監聽事件 16 //watcher.Created += new FileSystemEventHandler(watch_created); 17 //注冊當指定目錄的文件或者目錄發生改變的時候的監聽事件 18 watcher.Changed += new FileSystemEventHandler(watch_changed); 19 //注冊當刪除目錄的文件或者目錄的時候的監聽事件 20 watcher.Deleted += new FileSystemEventHandler(watch_deleted); 21 //當指定目錄的文件或者目錄發生重命名的時候的監聽事件 22 watcher.Renamed += new RenamedEventHandler(watch_renamed); 23 //結束初始化 24 watcher.EndInit(); 25 }