追踪单个文件的服务，不要文件夹的！

Question

我想在windows服务中追踪我指定的数个文件，如果文件移动，把旧路径和新路径返回給我！求方法！这里有没有哪位大哥实现过！希望指点

Answer 1

有一个FileSystemWatcher的类可以用来监视文件，文件夹也可以，怎么用，你可以用MSDN来查询一下很方便的

Answer 2

// monitor_fs.cpp
// compile with: /clr
#using <system.dll>using namespace System;
using namespace System::IO;ref class FSEventHandler
{
public:
    void OnChanged (Object^ source, FileSystemEventArgs^ e)
    {
        Console::WriteLine("File: {0} {1}", 
               e->FullPath, e->ChangeType);
    }
    void OnRenamed(Object^ source, RenamedEventArgs^ e)
    {
        Console::WriteLine("File: {0} renamed to {1}", 
                e->OldFullPath, e->FullPath);
    }
};int main()
{
   array<String^>^ args = Environment::GetCommandLineArgs();   if(args->Length < 2)
   {
      Console::WriteLine("Usage: Watcher.exe <directory>");
      return -1;
   }   FileSystemWatcher^ fsWatcher = gcnew FileSystemWatcher( );
   fsWatcher->Path = args[1];
   fsWatcher->NotifyFilter = static_cast<NotifyFilters> 
              (NotifyFilters::FileName | 
               NotifyFilters::Attributes | 
               NotifyFilters::LastAccess | 
               NotifyFilters::LastWrite | 
               NotifyFilters::Security | 
               NotifyFilters::Size );    FSEventHandler^ handler = gcnew FSEventHandler(); 
    fsWatcher->Changed += gcnew FileSystemEventHandler( 
            handler, &FSEventHandler::OnChanged);
    fsWatcher->Created += gcnew FileSystemEventHandler( 
            handler, &FSEventHandler::OnChanged);
    fsWatcher->Deleted += gcnew FileSystemEventHandler( 
            handler, &FSEventHandler::OnChanged);
    fsWatcher->Renamed += gcnew RenamedEventHandler( 
            handler, &FSEventHandler::OnRenamed);    fsWatcher->EnableRaisingEvents = true;    Console::WriteLine("Press Enter to quit the sample.");
    Console::ReadLine( );
}

Answer 3

C# 版有 
public class Watcher
{    public static void Main()
    {
Run();    }    [PermissionSet(SecurityAction.Demand, Name="FullTrust")]
    public static void Run()
    {
        string[] args = System.Environment.GetCommandLineArgs();        // If a directory is not specified, exit program.
        if(args.Length != 2)
        {
            // Display the proper way to call the program.
            Console.WriteLine("Usage: Watcher.exe (directory)");
            return;
        }        // Create a new FileSystemWatcher and set its properties.
        FileSystemWatcher watcher = new FileSystemWatcher();
        watcher.Path = args[1];
        /* Watch for changes in LastAccess and LastWrite times, and 
           the renaming of files or directories. */
        watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite 
           | NotifyFilters.FileName | NotifyFilters.DirectoryName;
        // Only watch text files.
        watcher.Filter = "*.txt";        // Add event handlers.
        watcher.Changed += new FileSystemEventHandler(OnChanged);
        watcher.Created += new FileSystemEventHandler(OnChanged);
        watcher.Deleted += new FileSystemEventHandler(OnChanged);
        watcher.Renamed += new RenamedEventHandler(OnRenamed);        // Begin watching.
        watcher.EnableRaisingEvents = true;        // Wait for the user to quit the program.
        Console.WriteLine("Press \'q\' to quit the sample.");
        while(Console.Read()!='q');
    }    // Define the event handlers.
    private static void OnChanged(object source, FileSystemEventArgs e)
    {
        // Specify what is done when a file is changed, created, or deleted.
       Console.WriteLine("File: " +  e.FullPath + " " + e.ChangeType);
    }    private 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);
    }
}

Answer 4

写文件名也要先写 watcher.Path,watcher.path只能是目录