文件監控之FileSystemWatcher（c++）

　　為了監控web程序的靜態文件是否被惡意改動，所以學習了一下FileSystemWatcher  類對文件的監控，由於還在初級階段，這里只貼一下關於FileSystemWatcher學習的一些代碼。

　　具體代碼如下：

#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();
      //創建一個FileSystemWatcher並設置它的屬性.
      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>(//監聽文件的以下屬性 按需求添加  這里我添加了一些常用的
                                NotifyFilters::LastAccess | //文件或文件夾上一次打開的日期。 
                                NotifyFilters::LastWrite | //上一次向文件或文件夾寫入內容的日期
                                NotifyFilters::FileName | //文件名
                                NotifyFilters::DirectoryName | //目錄名
                                NotifyFilters::Size); //大小

      //監聽子目錄
      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();
}

過程 1.首先創建FileSystemWatcher 對象  用來設置一些屬性以及添加監聽事件

　　 2.設置監聽目錄

　　 3.設置監聽文件的屬性

　　 4.設置監聽子目錄

　　 5.添加監聽事件

　　 6.開始監聽

上面的sample代碼可以在MSDN上找到，如果有不確定的地方，可以查看文檔