FileDialog.FileOk-Ereignis

Tritt ein, wenn der Benutzer in einem Dateidialogfeld auf die Schaltfläche Öffnen oder Speichern klickt.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

Syntax

'Declaration
Public Event FileOk As CancelEventHandler
'Usage
Dim instance As FileDialog
Dim handler As CancelEventHandler

AddHandler instance.FileOk, handler

public event CancelEventHandler FileOk

public:
event CancelEventHandler^ FileOk {
    void add (CancelEventHandler^ value);
    void remove (CancelEventHandler^ value);
}

/** @event */
public void add_FileOk (CancelEventHandler value)

/** @event */
public void remove_FileOk (CancelEventHandler value)

JScript unterstützt die Verwendung von Ereignissen, aber nicht die Deklaration von neuen Ereignissen.

Hinweise

Informationen zum Behandeln von Ereignissen finden Sie unter Behandeln von Ereignissen.

Beispiel

Im folgenden Codebeispiel wird das Verwenden der FileNames-Eigenschaft, das Behandeln des FileOk-Ereignisses und das Verwenden der Application.DoEvents-Methode veranschaulicht. Wenn das Beispiel ausgeführt wird, kann der Benutzer Grafikdateien in einem OpenFileDialog-Objekt auswählen. Die ausgewählten Dateien werden im Formular angezeigt. Die Application.DoEvents-Methode erzwingt den Neuaufbau des Formulars für jede geöffnete Grafikdatei. Wenn Sie dieses Beispiel ausführen möchten, fügen Sie den folgenden Code in ein Formular ein, das die PictureBoxPictureBox1, das OpenFileDialogOpenFileDialog1 und den ButtonfileButton enthält. Rufen Sie die InitializePictureBox-Methode und die InitializeOpenFileDialog-Methode aus dem Konstruktor oder der Load-Methode auf. Beim Ausführen des Beispiels können Sie das Dialogfeld durch Klicken auf die Schaltfläche öffnen.

Private Sub InitializePictureBox()
    Me.PictureBox1 = New System.Windows.Forms.PictureBox
    Me.PictureBox1.BorderStyle = _
        System.Windows.Forms.BorderStyle.FixedSingle
    Me.PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage
    Me.PictureBox1.Location = New System.Drawing.Point(72, 112)
    Me.PictureBox1.Name = "PictureBox1"
    Me.PictureBox1.Size = New System.Drawing.Size(160, 136)
    Me.PictureBox1.TabStop = False
End Sub

Private Sub InitializeOpenFileDialog()
    Me.OpenFileDialog1 = New System.Windows.Forms.OpenFileDialog

    ' Set the file dialog to filter for graphics files.
    Me.OpenFileDialog1.Filter = _
    "Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.*"

    ' Allow the user to select multiple images.
    Me.OpenFileDialog1.Multiselect = True
    Me.OpenFileDialog1.Title = "My Image Browser"
End Sub

Private Sub fileButton_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles FileButton.Click
    OpenFileDialog1.ShowDialog()
End Sub


' This method handles the FileOK event.  It opens each file 
' selected and loads the image from a stream into PictureBox1.
Private Sub OpenFileDialog1_FileOk(ByVal sender As Object, _
ByVal e As System.ComponentModel.CancelEventArgs) _
 Handles OpenFileDialog1.FileOk

    Me.Activate()
    Dim file, files() As String
    files = OpenFileDialog1.FileNames

    ' Open each file and display the image in PictureBox1.
    ' Call Application.DoEvents to force a repaint after each
    ' file is read.        
    For Each file In files
        Dim fileInfo As System.IO.FileInfo = New System.IO.FileInfo(file)
        Dim fileStream As System.IO.FileStream = fileInfo.OpenRead()
        PictureBox1.Image = System.Drawing.Image.FromStream(fileStream)
        Application.DoEvents()
        fileStream.Close()

        ' Call Sleep so the picture is briefly displayed, 
        'which will create a slide-show effect.
        System.Threading.Thread.Sleep(2000)
    Next
    PictureBox1.Image = Nothing
End Sub

private void InitializePictureBox()
{
    this.PictureBox1 = new System.Windows.Forms.PictureBox();
    this.PictureBox1.BorderStyle = 
        System.Windows.Forms.BorderStyle.FixedSingle;
    this.PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
    this.PictureBox1.Location = new System.Drawing.Point(72, 112);
    this.PictureBox1.Name = "PictureBox1";
    this.PictureBox1.Size = new System.Drawing.Size(160, 136);
    this.PictureBox1.TabIndex = 6;
    this.PictureBox1.TabStop = false;
}

private void InitializeOpenFileDialog()
{
    this.OpenFileDialog1 = new System.Windows.Forms.OpenFileDialog();

    // Set the file dialog to filter for graphics files.
    this.OpenFileDialog1.Filter = 
        "Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|" + 
        "All files (*.*)|*.*";

    // Allow the user to select multiple images.
    this.OpenFileDialog1.Multiselect = true;
    this.OpenFileDialog1.Title = "My Image Browser";
    
}

private void fileButton_Click(System.Object sender, System.EventArgs e)
{
    OpenFileDialog1.ShowDialog();
}


// This method handles the FileOK event.  It opens each file 
// selected and loads the image from a stream into PictureBox1.
private void OpenFileDialog1_FileOk(object sender, 
    System.ComponentModel.CancelEventArgs e)
{

    this.Activate();
     string[] files = OpenFileDialog1.FileNames;

    // Open each file and display the image in PictureBox1.
    // Call Application.DoEvents to force a repaint after each
    // file is read.        
    foreach (string file in files )
    {
        System.IO.FileInfo fileInfo = new System.IO.FileInfo(file);
        System.IO.FileStream fileStream = fileInfo.OpenRead();
        PictureBox1.Image = System.Drawing.Image.FromStream(fileStream);
        Application.DoEvents();
        fileStream.Close();

        // Call Sleep so the picture is briefly displayed, 
        //which will create a slide-show effect.
        System.Threading.Thread.Sleep(2000);
    }
    PictureBox1.Image = null;
}

void InitializePictureBox()
{
   this->PictureBox1 = gcnew System::Windows::Forms::PictureBox;
   this->PictureBox1->BorderStyle =
      System::Windows::Forms::BorderStyle::FixedSingle;
   this->PictureBox1->SizeMode = PictureBoxSizeMode::StretchImage;
   this->PictureBox1->Location = System::Drawing::Point( 72, 112 );
   this->PictureBox1->Name = "PictureBox1";
   this->PictureBox1->Size = System::Drawing::Size( 160, 136 );
   this->PictureBox1->TabIndex = 6;
   this->PictureBox1->TabStop = false;
}

void InitializeOpenFileDialog()
{
   this->OpenFileDialog1 = gcnew System::Windows::Forms::OpenFileDialog;
   
   // Set the file dialog to filter for graphics files.
   this->OpenFileDialog1->Filter =
      "Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|" +
      "All files (*.*)|*.*";
   
   // Allow the user to select multiple images.
   this->OpenFileDialog1->Multiselect = true;
   this->OpenFileDialog1->Title = "My Image Browser";
}

void fileButton_Click( System::Object^ sender, System::EventArgs^ e )
{
   OpenFileDialog1->ShowDialog();
}

// This method handles the FileOK event.  It opens each file 
// selected and loads the image from a stream into PictureBox1.
void OpenFileDialog1_FileOk( Object^ sender,
   System::ComponentModel::CancelEventArgs^ e )
{
   this->Activate();
   array<String^>^ files = OpenFileDialog1->FileNames;
   
   // Open each file and display the image in PictureBox1.
   // Call Application.DoEvents to force a repaint after each
   // file is read.        
   for each ( String^ file in files )
   {
      System::IO::FileInfo^ fileInfo = gcnew System::IO::FileInfo( file );
      System::IO::FileStream^ fileStream = fileInfo->OpenRead();
      PictureBox1->Image = System::Drawing::Image::FromStream( fileStream );
      Application::DoEvents();
      fileStream->Close();
      
      // Call Sleep so the picture is briefly displayed, 
      //which will create a slide-show effect.
      System::Threading::Thread::Sleep( 2000 );
   }
   PictureBox1->Image = nullptr;
}

private void InitializePictureBox()
{
    this.pictureBox1 = new System.Windows.Forms.PictureBox();
    this.pictureBox1.set_BorderStyle(
        System.Windows.Forms.BorderStyle.FixedSingle);
    this.pictureBox1.set_SizeMode(PictureBoxSizeMode.StretchImage);
    this.pictureBox1.set_Location(new System.Drawing.Point(72, 112));
    this.pictureBox1.set_Name("pictureBox1");
    this.pictureBox1.set_Size(new System.Drawing.Size(160, 136));
    this.pictureBox1.set_TabIndex(6);
    this.pictureBox1.set_TabStop(false);
} //InitializePictureBox

private void InitializeOpenFileDialog()
{
    this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
    // Set the file dialog to filter for graphics files.
    this.openFileDialog1.set_Filter("Images (*.BMP;*.JPG;*.GIF)|" 
        + "*.BMP;*.JPG;*.GIF|All files (*.*)|*.*");
    // Allow the user to select multiple images.
    this.openFileDialog1.set_Multiselect(true);
    this.openFileDialog1.set_Title("My Image Browser");
} //InitializeOpenFileDialog

private void fileButton_Click(Object sender, System.EventArgs e)
{
    openFileDialog1.ShowDialog();
} //fileButton_Click

// This method handles the FileOK event. It opens each file 
// selected and loads the image from a stream into pictureBox1.
private void openFileDialog1_FileOk(Object sender, 
    System.ComponentModel.CancelEventArgs e)
{
    this.Activate();
    String files[] = openFileDialog1.get_FileNames();
    // Open each file and display the image in pictureBox1.
    // Call Application.DoEvents to force a repaint after each
    // file is read.
    for (int iCtr = 0; iCtr < files.length; iCtr++) {
        String file = files[iCtr];
        System.IO.FileInfo fileInfo = new System.IO.FileInfo(file);
        System.IO.FileStream fileStream = fileInfo.OpenRead();
        pictureBox1.set_Image(System.Drawing.Image.FromStream(fileStream));
        Application.DoEvents();
        fileStream.Close();
        // Call Sleep so the picture is briefly displayed, 
        // which will create a slide-show effect.
        System.Threading.Thread.Sleep(2000);
    }
    pictureBox1.set_Image(null);
} //openFileDialog1_FileOk

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

FileDialog-Klasse
FileDialog-Member
System.Windows.Forms-Namespace
OnFileOk