FileSystemWatcher Constructores

Source:

FileSystemWatcher.cs

Source:

FileSystemWatcher.cs

Source:

FileSystemWatcher.cs

public:
 FileSystemWatcher();

public FileSystemWatcher ();

Public Sub New ()

Ejemplos

En el ejemplo siguiente se crea un FileSystemWatcher objeto para watch el directorio especificado en tiempo de ejecución. El FileSystemWatcher objeto busca cambios en LastWrite y LastAccess horas, y para la creación, eliminación o cambio de nombre de los archivos de texto en el directorio. Si se cambia, crea o elimina un archivo, la ruta de acceso al archivo se muestra en la consola. Cuando se cambia el nombre de un archivo, las rutas de acceso antiguas y nuevas se muestran en la consola.

En este ejemplo se usan los System.Diagnostics espacios de nombres y System.IO .

#include "pch.h"

using namespace System;
using namespace System::IO;

class MyClassCPP
{
public:

    int static Run()
    {
        FileSystemWatcher^ watcher = gcnew FileSystemWatcher("C:\\path\\to\\folder");

        watcher->NotifyFilter = static_cast<NotifyFilters>(NotifyFilters::Attributes
                                                         | NotifyFilters::CreationTime
                                                         | NotifyFilters::DirectoryName
                                                         | NotifyFilters::FileName
                                                         | NotifyFilters::LastAccess
                                                         | NotifyFilters::LastWrite
                                                         | NotifyFilters::Security
                                                         | NotifyFilters::Size);

        watcher->Changed += gcnew FileSystemEventHandler(MyClassCPP::OnChanged);
        watcher->Created += gcnew FileSystemEventHandler(MyClassCPP::OnCreated);
        watcher->Deleted += gcnew FileSystemEventHandler(MyClassCPP::OnDeleted);
        watcher->Renamed += gcnew RenamedEventHandler(MyClassCPP::OnRenamed);
        watcher->Error   += gcnew ErrorEventHandler(MyClassCPP::OnError);

        watcher->Filter = "*.txt";
        watcher->IncludeSubdirectories = true;
        watcher->EnableRaisingEvents = true;

        Console::WriteLine("Press enter to exit.");
        Console::ReadLine();

        return 0;
    }

private:

    static void OnChanged(Object^ sender, FileSystemEventArgs^ e)
    {
        if (e->ChangeType != WatcherChangeTypes::Changed)
        {
            return;
        }
        Console::WriteLine("Changed: {0}", e->FullPath);
    }

    static void OnCreated(Object^ sender, FileSystemEventArgs^ e)
    {
        Console::WriteLine("Created: {0}", e->FullPath);
    }

    static void OnDeleted(Object^ sender, FileSystemEventArgs^ e)
    {
        Console::WriteLine("Deleted: {0}", e->FullPath);
    }

    static void OnRenamed(Object^ sender, RenamedEventArgs^ e)
    {
        Console::WriteLine("Renamed:");
        Console::WriteLine("    Old: {0}", e->OldFullPath);
        Console::WriteLine("    New: {0}", e->FullPath);
    }

    static void OnError(Object^ sender, ErrorEventArgs^ e)
    {
        PrintException(e->GetException());
    }

    static void PrintException(Exception^ ex)
    {
        if (ex != nullptr)
        {
            Console::WriteLine("Message: {0}", ex->Message);
            Console::WriteLine("Stacktrace:");
            Console::WriteLine(ex->StackTrace);
            Console::WriteLine();
            PrintException(ex->InnerException);
        }
    }
};


int main()
{
    MyClassCPP::Run();
}

using System;
using System.IO;

namespace MyNamespace
{
    class MyClassCS
    {
        static void Main()
        {
            using var watcher = new FileSystemWatcher(@"C:\path\to\folder");

            watcher.NotifyFilter = NotifyFilters.Attributes
                                 | NotifyFilters.CreationTime
                                 | NotifyFilters.DirectoryName
                                 | NotifyFilters.FileName
                                 | NotifyFilters.LastAccess
                                 | NotifyFilters.LastWrite
                                 | NotifyFilters.Security
                                 | NotifyFilters.Size;

            watcher.Changed += OnChanged;
            watcher.Created += OnCreated;
            watcher.Deleted += OnDeleted;
            watcher.Renamed += OnRenamed;
            watcher.Error += OnError;

            watcher.Filter = "*.txt";
            watcher.IncludeSubdirectories = true;
            watcher.EnableRaisingEvents = true;

            Console.WriteLine("Press enter to exit.");
            Console.ReadLine();
        }

        private static void OnChanged(object sender, FileSystemEventArgs e)
        {
            if (e.ChangeType != WatcherChangeTypes.Changed)
            {
                return;
            }
            Console.WriteLine($"Changed: {e.FullPath}");
        }

        private static void OnCreated(object sender, FileSystemEventArgs e)
        {
            string value = $"Created: {e.FullPath}";
            Console.WriteLine(value);
        }

        private static void OnDeleted(object sender, FileSystemEventArgs e) =>
            Console.WriteLine($"Deleted: {e.FullPath}");

        private static void OnRenamed(object sender, RenamedEventArgs e)
        {
            Console.WriteLine($"Renamed:");
            Console.WriteLine($"    Old: {e.OldFullPath}");
            Console.WriteLine($"    New: {e.FullPath}");
        }

        private static void OnError(object sender, ErrorEventArgs e) =>
            PrintException(e.GetException());

        private static void PrintException(Exception? ex)
        {
            if (ex != null)
            {
                Console.WriteLine($"Message: {ex.Message}");
                Console.WriteLine("Stacktrace:");
                Console.WriteLine(ex.StackTrace);
                Console.WriteLine();
                PrintException(ex.InnerException);
            }
        }
    }
}

Imports System.IO

Namespace MyNamespace

    Class MyClassVB

        Shared Sub Main()
            Using watcher = New FileSystemWatcher("C:\path\to\folder")
                watcher.NotifyFilter = NotifyFilters.Attributes Or
                                       NotifyFilters.CreationTime Or
                                       NotifyFilters.DirectoryName Or
                                       NotifyFilters.FileName Or
                                       NotifyFilters.LastAccess Or
                                       NotifyFilters.LastWrite Or
                                       NotifyFilters.Security Or
                                       NotifyFilters.Size

                AddHandler watcher.Changed, AddressOf OnChanged
                AddHandler watcher.Created, AddressOf OnCreated
                AddHandler watcher.Deleted, AddressOf OnDeleted
                AddHandler watcher.Renamed, AddressOf OnRenamed
                AddHandler watcher.Error, AddressOf OnError

                watcher.Filter = "*.txt"
                watcher.IncludeSubdirectories = True
                watcher.EnableRaisingEvents = True

                Console.WriteLine("Press enter to exit.")
                Console.ReadLine()
            End Using
        End Sub

        Private Shared Sub OnChanged(sender As Object, e As FileSystemEventArgs)
            If e.ChangeType <> WatcherChangeTypes.Changed Then
                Return
            End If
            Console.WriteLine($"Changed: {e.FullPath}")
        End Sub

        Private Shared Sub OnCreated(sender As Object, e As FileSystemEventArgs)
            Dim value As String = $"Created: {e.FullPath}"
            Console.WriteLine(value)
        End Sub

        Private Shared Sub OnDeleted(sender As Object, e As FileSystemEventArgs)
            Console.WriteLine($"Deleted: {e.FullPath}")
        End Sub

        Private Shared Sub OnRenamed(sender As Object, e As RenamedEventArgs)
            Console.WriteLine($"Renamed:")
            Console.WriteLine($"    Old: {e.OldFullPath}")
            Console.WriteLine($"    New: {e.FullPath}")
        End Sub

        Private Shared Sub OnError(sender As Object, e As ErrorEventArgs)
            PrintException(e.GetException())
        End Sub

        Private Shared Sub PrintException(ex As Exception)
            If ex IsNot Nothing Then
                Console.WriteLine($"Message: {ex.Message}")
                Console.WriteLine("Stacktrace:")
                Console.WriteLine(ex.StackTrace)
                Console.WriteLine()
                PrintException(ex.InnerException)
            End If
        End Sub

    End Class

End Namespace

Comentarios

No se puede watch un equipo remoto que no tenga Windows NT o Windows 2000. No se puede watch un equipo remoto de Windows NT 4.0 desde un equipo Con Windows NT 4.0.

En la tabla siguiente se muestran los valores de propiedad iniciales de una instancia de FileSystemWatcher.

Consulte también

• NotifyFilters
• FileSystemEventArgs
• FileSystemEventHandler
• InternalBufferOverflowException
• Path
• RenamedEventArgs
• RenamedEventHandler
• WaitForChangedResult
• WatcherChangeTypes

Source:

FileSystemWatcher.cs

Source:

FileSystemWatcher.cs

Source:

FileSystemWatcher.cs

public:
 FileSystemWatcher(System::String ^ path);

public FileSystemWatcher (string path);

new System.IO.FileSystemWatcher : string -> System.IO.FileSystemWatcher

Public Sub New (path As String)

Parámetros

Excepciones

Comentarios

El componente puede watch archivos en su equipo personal, una unidad de red o un equipo remoto.

No se puede watch un equipo remoto que no tenga Windows NT o Windows 2000. No se puede watch un equipo remoto de Windows NT 4.0 desde un equipo Con Windows NT 4.0. La Filter propiedad se establece de forma predeterminada en watch todos los archivos.

Consulte también

• NotifyFilters
• FileSystemEventArgs
• FileSystemEventHandler
• Filter
• InternalBufferOverflowException
• Path
• RenamedEventArgs
• RenamedEventHandler
• WaitForChangedResult
• WatcherChangeTypes

Source:

FileSystemWatcher.cs

Source:

FileSystemWatcher.cs

Source:

FileSystemWatcher.cs

public:
 FileSystemWatcher(System::String ^ path, System::String ^ filter);

public FileSystemWatcher (string path, string filter);

new System.IO.FileSystemWatcher : string * string -> System.IO.FileSystemWatcher

Public Sub New (path As String, filter As String)

Parámetros

Excepciones

Comentarios

El componente puede watch archivos en su equipo personal, una unidad de red o un equipo remoto.

No se puede watch un equipo remoto que no tenga Windows NT o Windows 2000. No se puede watch un equipo remoto de Windows NT 4.0 desde un equipo Con Windows NT 4.0.

Consulte también

• NotifyFilters
• FileSystemEventArgs
• FileSystemEventHandler
• Filter
• InternalBufferOverflowException
• Path
• RenamedEventArgs
• RenamedEventHandler
• WaitForChangedResult
• WatcherChangeTypes