文件监控之FileSystemWatcher（c++）

　　为了监控web程序的静态文件是否被恶意改动，所以学习了一下FileSystemWatcher  类对文件的监控，由于还在初级阶段，这里只贴一下关于FileSystemWatcher学习的一些代码。

　　具体代码如下：

#using <System.dll>

#include <iostream>



using namespace std;

using namespace System;

using namespace System::IO;

using namespace System::Security::Permissions;



public ref class Watcher

{

private:

   // Define the event handlers.

   static void OnChanged( Object^ /*source*/, FileSystemEventArgs^ e )

   {

      // Specify what is done when a file is changed, created, or deleted.

      Console::WriteLine( "File: {0} {1}", e->FullPath, e->ChangeType );

   }



   static void OnRenamed( Object^ /*source*/, RenamedEventArgs^ e )

   {

      // Specify what is done when a file is renamed.

      Console::WriteLine( "File: {0} renamed to {1}", e->OldFullPath, e->FullPath );

   }



public:

   [PermissionSet(SecurityAction::Demand, Name="FullTrust")]

   int static run()

   {

      //array<String^>^args = System::Environment::GetCommandLineArgs();

      //创建一个FileSystemWatcher并设置它的属性.

      FileSystemWatcher^ fsWatcher = gcnew FileSystemWatcher( );

      fsWatcher->Path = "C:\\files";



      /* Watch for changes in LastAccess and LastWrite times, and

          the renaming of files or directories. */

      fsWatcher->NotifyFilter = static_cast<NotifyFilters>(//监听文件的以下属性 按需求添加  这里我添加了一些常用的

                                NotifyFilters::LastAccess | //文件或文件夹上一次打开的日期。 

                                NotifyFilters::LastWrite | //上一次向文件或文件夹写入内容的日期

                                NotifyFilters::FileName | //文件名

                                NotifyFilters::DirectoryName | //目录名

                                NotifyFilters::Size); //大小



      //监听子目录

      fsWatcher->IncludeSubdirectories = true;

      // Only watch text files.

      //fsWatcher->Filter = "*.txt";



      // Add event handlers.

      fsWatcher->Changed += gcnew FileSystemEventHandler( Watcher::OnChanged );

      fsWatcher->Created += gcnew FileSystemEventHandler( Watcher::OnChanged );

      fsWatcher->Deleted += gcnew FileSystemEventHandler( Watcher::OnChanged );

      fsWatcher->Renamed += gcnew RenamedEventHandler( Watcher::OnRenamed );



      // Begin watching.

      fsWatcher->EnableRaisingEvents = true;



      // Wait for the user to quit the program.

      Console::WriteLine( "Press \'q\' to quit the sample." );

      while ( Console::Read() != 'q' );



      return 0;

   }

};



int main() {

   Watcher::run();

}

过程 1.首先创建FileSystemWatcher 对象  用来设置一些属性以及添加监听事件

　　 2.设置监听目录

　　 3.设置监听文件的属性

　　 4.设置监听子目录

　　 5.添加监听事件

　　 6.开始监听

上面的sample代码可以在MSDN上找到，如果有不确定的地方，可以查看文档