FileSystemWatcher.Created FileSystemWatcher.Created FileSystemWatcher.Created FileSystemWatcher.Created Event

定義

指定した Path のファイルまたはディレクトリが作成されたときに発生します。Occurs when a file or directory in the specified Path is created.

public:
 event System::IO::FileSystemEventHandler ^ Created;
[System.IO.IODescription("Occurs when a file/directory creation matches the filter")]
[System.IO.IODescription("FSW_Created")]
public event System.IO.FileSystemEventHandler Created;
member this.Created : System.IO.FileSystemEventHandler 
Public Custom Event Created As FileSystemEventHandler 
属性

次の例ではCreated 、イベントを使用して、監視対象のファイルが作成されるたびにコンソールへのファイルパスを表示します。The following example uses the Created event to display the file path to the console whenever the watched file is created.

#using <System.dll>

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();

      // 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 0;
      }

      // Create a new FileSystemWatcher and set its properties.
      FileSystemWatcher^ watcher = gcnew FileSystemWatcher;
      watcher->Path = args[ 1 ];

      /* Watch for changes in LastAccess and LastWrite times, and 
          the renaming of files or directories. */
      watcher->NotifyFilter = static_cast<NotifyFilters>(NotifyFilters::LastAccess |
            NotifyFilters::LastWrite | NotifyFilters::FileName | NotifyFilters::DirectoryName);

      // Only watch text files.
      watcher->Filter = "*.txt";

      // Add event handlers.
      watcher->Changed += gcnew FileSystemEventHandler( Watcher::OnChanged );
      watcher->Created += gcnew FileSystemEventHandler( Watcher::OnChanged );
      watcher->Deleted += gcnew FileSystemEventHandler( Watcher::OnChanged );
      watcher->Renamed += gcnew RenamedEventHandler( Watcher::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' );

      return 0;
   }
};

int main() {
   Watcher::run();
}
using System;
using System.IO;
using System.Security.Permissions;

public class Watcher
{
    public static void Main()
    {
        Run();
    }

    [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
    private static void Run()
    {
        string[] args = 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.
        using (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 += OnChanged;
            watcher.Created += OnChanged;
            watcher.Deleted += OnChanged;
            watcher.Renamed += 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: {e.OldFullPath} renamed to {e.FullPath}");
}
Imports System
Imports System.IO
Imports System.Security.Permissions
Imports Microsoft.VisualBasic

Public Class Watcher

    Public Shared Sub Main()

        Run()

    End Sub

    <PermissionSet(SecurityAction.Demand, Name:="FullTrust")>
    Private Shared Sub Run()

        Dim args() As String = Environment.GetCommandLineArgs()

        ' If a directory is not specified, exit the program.
        If args.Length <> 2 Then
            ' Display the proper way to call the program.
            Console.WriteLine("Usage: Watcher.exe (directory)")
            Return
        End If

        ' Create a new FileSystemWatcher and set its properties.
        Using watcher As 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 _
                                 Or NotifyFilters.LastWrite _
                                 Or NotifyFilters.FileName _
                                 Or NotifyFilters.DirectoryName)

            ' Only watch text files.
            watcher.Filter = "*.txt"

            ' Add event handlers.
            AddHandler watcher.Changed, AddressOf OnChanged
            AddHandler watcher.Created, AddressOf OnChanged
            AddHandler watcher.Deleted, AddressOf OnChanged
            AddHandler watcher.Renamed, AddressOf OnRenamed

            ' Begin watching.
            watcher.EnableRaisingEvents = True

            ' Wait for the user to quit the program.
            Console.WriteLine("Press 'q' to quit the sample.")
            While Chr(Console.Read()) <> "q"c
            End While
        End Using
    End Sub

    ' Define the event handlers.
    Private Shared Sub OnChanged(source As Object, e As FileSystemEventArgs)
        ' Specify what is done when a file is changed, created, or deleted.
        Console.WriteLine($"File: {e.FullPath} {e.ChangeType}")
    End Sub

    Private Shared Sub OnRenamed(source As Object, e As RenamedEventArgs)
        ' Specify what is done when a file is renamed.
        Console.WriteLine($"File: {e.OldFullPath} renamed to {e.FullPath}")
    End Sub

End Class

注釈

ファイルやディレクトリのコピーや移動など、いくつかの一般的な原因はイベントに直接対応していませんが、これらの発生によってイベントが発生します。Some common occurrences, such as copying or moving a file or directory, do not correspond directly to an event, but these occurrences do cause events to be raised. ファイルまたはディレクトリをコピーすると、そのディレクトリがCreated監視されている場合、ファイルのコピー先のディレクトリでイベントが発生します。When you copy a file or directory, the system raises a Created event in the directory to which the file was copied, if that directory is being watched. コピー元のディレクトリがの別のFileSystemWatcherインスタンスによって監視されていた場合、イベントは発生しません。If the directory from which you copied was being watched by another instance of FileSystemWatcher, no event would be raised. たとえば、の2つのFileSystemWatcherインスタンスを作成したとします。For example, you create two instances of FileSystemWatcher. FileSystemWatcher1 は "C:\My Documents" を監視するように設定されており、FileSystemWatcher2 は "C:\ your Documents" を監視するように設定されています。FileSystemWatcher1 is set to watch "C:\My Documents", and FileSystemWatcher2 is set to watch "C:\Your Documents". "マイドキュメント" から "ドキュメントCreated " にファイルをコピーすると、FileSystemWatcher2 によってイベントが発生しますが、FileSystemWatcher1 に対してイベントは発生しません。If you copy a file from "My Documents" into "Your Documents", a Created event will be raised by FileSystemWatcher2, but no event is raised for FileSystemWatcher1. コピーとは異なり、ファイルまたはディレクトリを移動すると、2つのイベントが発生します。Unlike copying, moving a file or directory would raise two events. 前の例では、ファイルを "My documents" から "your documents" Createdに移動した場合、FileSystemWatcher2 によってイベントが発生Deletedし、FileSystemWatcher1 によってイベントが発生します。From the previous example, if you moved a file from "My Documents" to "Your Documents", a Created event would be raised by FileSystemWatcher2 and a Deleted event would be raised by FileSystemWatcher1.

注意

一般的なファイルシステム操作では、複数のイベントが発生する可能性があります。Common file system operations might raise more than one event. たとえば、あるディレクトリから別のディレクトリにファイルを移動すると、 OnChangedいくつOnCreatedかのOnDeletedイベントとイベントが発生する可能性があります。For example, when a file is moved from one directory to another, several OnChanged and some OnCreated and OnDeleted events might be raised. ファイルの移動は、複数の単純な操作で構成される複雑な操作であるため、複数のイベントが発生します。Moving a file is a complex operation that consists of multiple simple operations, therefore raising multiple events. 同様に、一部のアプリケーション (ウイルス対策ソフトウェアなど) によって、によってFileSystemWatcher検出された追加のファイルシステムイベントが発生する可能性があります。Likewise, some applications (for example, antivirus software) might cause additional file system events that are detected by FileSystemWatcher.

注意

Created他のFileSystemWatcher イベントにnull関連してイベントが発生する順序は、プロパティがではない場合に変更される可能性があります。SynchronizingObjectThe order in which the Created event is raised in relation to the other FileSystemWatcher events may change when the SynchronizingObject property is not null.

OnCreatedイベントは、ファイルが作成されるとすぐに発生します。The OnCreated event is raised as soon as a file is created. 監視対象のディレクトリOnCreatedにファイルをコピーまたは転送する場合、イベントはすぐに発生し、その後に1つOnChanged以上のイベントが続きます。If a file is being copied or transferred into a watched directory, the OnCreated event will be raised immediately, followed by one or more OnChanged events.

適用対象

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