PictureBoxSizeMode-Enumeration

Artikel
08/20/2007

Gibt die Positionierung eines Bildes in einer PictureBox an.

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

Syntax

'Declaration
Public Enumeration PictureBoxSizeMode
'Usage
Dim instance As PictureBoxSizeMode

public enum PictureBoxSizeMode

public enum class PictureBoxSizeMode

public enum PictureBoxSizeMode

public enum PictureBoxSizeMode

Member

	Membername	Beschreibung
	AutoSize	Die Größe von PictureBox entspricht der Größe des enthaltenen Bildes.
	CenterImage	Das Bild wird in der Mitte angezeigt, wenn PictureBox größer als das Bild ist. Wenn das Bild größer als PictureBox ist, wird es in PictureBox zentriert und die äußeren Ränder werden abgeschnitten.
	Normal	Das Bild wird in der linken oberen Ecke von PictureBox platziert. Das Bild wird abgeschnitten, wenn es größer als die PictureBox ist, in der es enthalten ist.
	StretchImage	Das Bild in PictureBox wird gestreckt oder verkleinert, damit es der Größe von PictureBox entspricht.
	Zoom	Das Bild wird unter Beibehaltung des Größenverhältnisses vergrößert oder verkleinert.

Hinweise

Mithilfe der Member dieser Enumeration legen Sie den Wert der SizeMode-Eigenschaft von PictureBox fest.

Beispiel

Im folgenden Codebeispiel wird die Verwendung des PictureBox-Steuerelements und des ListView-Steuerelements veranschaulicht. Die PictureBox wird durch Festlegen der PictureBox.BorderStyle-Eigenschaft und der PictureBox.SizeMode-Eigenschaft mithilfe der BorderStyle-Enumeration bzw. der PictureBoxSizeMode-Enumeration initialisiert. Die ListView wird mit Bildern aus dem Verzeichnis Samples gefüllt. Die ListView.GetItemAt-Methode wird beim Behandeln des MouseDown-Ereignisses des ListView-Steuerelements verwendet, um zu bestimmen, ob ein Element ausgewählt wurde. Wenn ein Element ausgewählt wird, zeigt der Ereignishandler die ausgewählte Datei durch Festlegen der PictureBox.Image-Eigenschaft an. Im Beispiel wird davon ausgegangen, dass im Verzeichnis C:\Dokumente und Einstellungen\Alle Benutzer\Dokumente\Eigene Bilder\Beispielbilder JPG-Dateien vorhanden sind. Zum Ausführen dieses Beispiels fügen Sie folgenden Code in ein Formular ein, und rufen Sie die InitializePictureBox-Methode und die PopulateListView-Methode im Konstruktor oder in der Load-Ereignismethode des Formulars auf. Stellen Sie sicher, dass allen Ereignissen eine entsprechende Methode für die Ereignisbehandlung zugeordnet ist.

Private Sub PopulateListView()
    ListView1.Width = 270
    ListView1.Location = New System.Drawing.Point(10, 10)

    ' Declare and construct the ColumnHeader objects.
    Dim header1, header2 As ColumnHeader
    header1 = New ColumnHeader
    header2 = New ColumnHeader

    ' Set the text, alignment and width for each column header.
    header1.Text = "File name"
    header1.TextAlign = HorizontalAlignment.Left
    header1.Width = 70

    header2.TextAlign = HorizontalAlignment.Left
    header2.Text = "Location"
    header2.Width = 200

    ' Add the headers to the ListView control.
    ListView1.Columns.Add(header1)
    ListView1.Columns.Add(header2)

    ' Populate the ListView.Items property.
    ' Set the directory to the sample picture directory.
    Dim dirInfo As New System.IO.DirectoryInfo _
        ("C:\Documents and Settings\All Users" _
        & "\Documents\My Pictures\Sample Pictures")
    Dim file As System.IO.FileInfo

    ' Get the .jpg files from the directory
    Dim files() As System.io.FileInfo = dirInfo.GetFiles("*.jpg")

    ' Add each file name and full name including path
    ' to the ListView.
    If Not (files Is Nothing) Then
        For Each file In files
            Dim item As New ListViewItem(file.Name)
            item.SubItems.Add(file.FullName)
            ListView1.Items.Add(item)
        Next
    End If
End Sub

Private Sub InitializePictureBox()
    PictureBox1 = New PictureBox

    ' Set the location and size of the PictureBox control.
    Me.PictureBox1.Location = New System.Drawing.Point(70, 120)
    Me.PictureBox1.Size = New System.Drawing.Size(140, 140)
    Me.PictureBox1.TabStop = False

    ' Set the SizeMode property to the StretchImage value.  This
    ' will shrink or enlarge the image as needed to fit into
    ' the PictureBox.
    Me.PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage

    ' Set the border style to a three-dimensional border.
    Me.PictureBox1.BorderStyle = BorderStyle.Fixed3D

    ' Add the PictureBox to the form.
    Me.Controls.Add(Me.PictureBox1)

End Sub


Private Sub ListView1_MouseDown(ByVal sender As Object, _
    ByVal e As MouseEventArgs) Handles ListView1.MouseDown

    Dim selection As ListViewItem = ListView1.GetItemAt(e.X, e.Y)

    ' If the user selects an item in the ListView, display
    ' the image in the PictureBox.
    If Not (selection Is Nothing) Then
        PictureBox1.Image = System.Drawing.Image.FromFile _
            (selection.SubItems(1).Text)
    End If


End Sub

private void PopulateListView()
{
    ListView1.Width = 270;
    ListView1.Location = new System.Drawing.Point(10, 10);

    // Declare and construct the ColumnHeader objects.
    ColumnHeader header1, header2;
    header1 = new ColumnHeader();
    header2 = new ColumnHeader();

    // Set the text, alignment and width for each column header.
    header1.Text = "File name";
    header1.TextAlign = HorizontalAlignment.Left;
    header1.Width = 70;

    header2.TextAlign = HorizontalAlignment.Left;
    header2.Text = "Location";
    header2.Width = 200;

    // Add the headers to the ListView control.
    ListView1.Columns.Add(header1);
    ListView1.Columns.Add(header2);

    // Populate the ListView.Items property.
    // Set the directory to the sample picture directory.
    System.IO.DirectoryInfo dirInfo = 
        new System.IO.DirectoryInfo(
        "C:\\Documents and Settings\\All Users" +
        "\\Documents\\My Pictures\\Sample Pictures");
    

    // Get the .jpg files from the directory
    System.IO.FileInfo[] files = dirInfo.GetFiles("*.jpg");

    // Add each file name and full name including path
    // to the ListView.
    if (files != null)
    {
        foreach ( System.IO.FileInfo file in files )
        {
            ListViewItem item = new ListViewItem(file.Name);
            item.SubItems.Add(file.FullName);
            ListView1.Items.Add(item);
        }
    }
}

private void InitializePictureBox()
{
    PictureBox1 = new PictureBox();

    // Set the location and size of the PictureBox control.
    this.PictureBox1.Location = new System.Drawing.Point(70, 120);
    this.PictureBox1.Size = new System.Drawing.Size(140, 140);
    this.PictureBox1.TabStop = false;

    // Set the SizeMode property to the StretchImage value.  This
    // will shrink or enlarge the image as needed to fit into
    // the PictureBox.
    this.PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;

    // Set the border style to a three-dimensional border.
    this.PictureBox1.BorderStyle = BorderStyle.Fixed3D;

    // Add the PictureBox to the form.
    this.Controls.Add(this.PictureBox1);

}


private void ListView1_MouseDown(object sender, MouseEventArgs e)
{

    ListViewItem selection = ListView1.GetItemAt(e.X, e.Y);

    // If the user selects an item in the ListView, display
    // the image in the PictureBox.
    if (selection != null)
    {
        PictureBox1.Image = System.Drawing.Image.FromFile(
            selection.SubItems[1].Text);
    }
}

private:
   void PopulateListView()
   {
      ListView1->Width = 270;
      ListView1->Location = System::Drawing::Point( 10, 10 );
      
      // Declare and construct the ColumnHeader objects.
      ColumnHeader^ header1;
      ColumnHeader^ header2;
      header1 = gcnew ColumnHeader;
      header2 = gcnew ColumnHeader;
      
      // Set the text, alignment and width for each column header.
      header1->Text = "File name";
      header1->TextAlign = HorizontalAlignment::Left;
      header1->Width = 70;
      header2->TextAlign = HorizontalAlignment::Left;
      header2->Text = "Location";
      header2->Width = 200;
      
      // Add the headers to the ListView control.
      ListView1->Columns->Add( header1 );
      ListView1->Columns->Add( header2 );
      
      // Populate the ListView.Items property.
      // Set the directory to the sample picture directory.
      System::IO::DirectoryInfo^ dirInfo = gcnew System::IO::DirectoryInfo( "C:\\Documents and Settings\\All Users"
      "\\Documents\\My Pictures\\Sample Pictures" );
      
      // Get the .jpg files from the directory
      array<System::IO::FileInfo^>^files = dirInfo->GetFiles( "*.jpg" );
      
      // Add each file name and full name including path
      // to the ListView.
      if ( files != nullptr )
      {
         System::Collections::IEnumerator^ myEnum = files->GetEnumerator();
         while ( myEnum->MoveNext() )
         {
            System::IO::FileInfo^ file = safe_cast<System::IO::FileInfo^>(myEnum->Current);
            ListViewItem^ item = gcnew ListViewItem( file->Name );
            item->SubItems->Add( file->FullName );
            ListView1->Items->Add( item );
         }
      }
   }

   void InitializePictureBox()
   {
      PictureBox1 = gcnew PictureBox;
      
      // Set the location and size of the PictureBox control.
      this->PictureBox1->Location = System::Drawing::Point( 70, 120 );
      this->PictureBox1->Size = System::Drawing::Size( 140, 140 );
      this->PictureBox1->TabStop = false;
      
      // Set the SizeMode property to the StretchImage value.  This
      // will shrink or enlarge the image as needed to fit into
      // the PictureBox.
      this->PictureBox1->SizeMode = PictureBoxSizeMode::StretchImage;
      
      // Set the border style to a three-dimensional border.
      this->PictureBox1->BorderStyle = BorderStyle::Fixed3D;
      
      // Add the PictureBox to the form.
      this->Controls->Add( this->PictureBox1 );
   }

   void ListView1_MouseDown( Object^ /*sender*/, MouseEventArgs^ e )
   {
      ListViewItem^ selection = ListView1->GetItemAt( e->X, e->Y );
      
      // If the user selects an item in the ListView, display
      // the image in the PictureBox.
      if ( selection != nullptr )
      {
         PictureBox1->Image = System::Drawing::Image::FromFile( selection->SubItems[ 1 ]->Text );
      }
   }

private void PopulateListView()
{
    listView1.set_Width(270);
    listView1.set_Location(new System.Drawing.Point(10, 10));
    // Declare and construct the ColumnHeader objects.
    ColumnHeader header1, header2;
    header1 = new ColumnHeader();
    header2 = new ColumnHeader();
    // Set the text, alignment and width for each column header.
    header1.set_Text("File name");
    header1.set_TextAlign(HorizontalAlignment.Left);
    header1.set_Width(70);

    header2.set_TextAlign(HorizontalAlignment.Left);
    header2.set_Text("Location");
    header2.set_Width(200);
    // Add the headers to the ListView control.
    listView1.get_Columns().Add(header1);
    listView1.get_Columns().Add(header2);
    // Populate the ListView.Items property.
    // Set the directory to the sample picture directory.
    System.IO.DirectoryInfo dirInfo =
        new System.IO.DirectoryInfo("C:\\Documents and Settings\\All Users"
        + "\\Documents\\My Pictures\\Sample Pictures");
    // Get the.jpg files from the directory
    System.IO.FileInfo files[] = dirInfo.GetFiles("*.jpg");
    // Add each file name and full name including path
    // to the ListView.
    if (files != null) {
        for (int iCtr = 0; iCtr < files.length; iCtr++) {
            System.IO.FileInfo file = files[iCtr];
            ListViewItem item = new ListViewItem(file.get_Name());
            item.get_SubItems().Add(file.get_FullName());
            listView1.get_Items().Add(item);
        }
    }
} //PopulateListView

private void InitializePictureBox()
{
    pictureBox1 = new PictureBox();
    // Set the location and size of the PictureBox control.
    this.pictureBox1.set_Location(new System.Drawing.Point(70, 120));
    this.pictureBox1.set_Size(new System.Drawing.Size(140, 140));
    this.pictureBox1.set_TabStop(false);
    // Set the SizeMode property to the StretchImage value.  This
    // will shrink or enlarge the image as needed to fit into
    // the PictureBox.
    this.pictureBox1.set_SizeMode(PictureBoxSizeMode.StretchImage);
    // Set the border style to a three-dimensional border.
    this.pictureBox1.set_BorderStyle(BorderStyle.Fixed3D);
    // Add the PictureBox to the form.
    this.get_Controls().Add(this.pictureBox1);
} //InitializePictureBox

private void listView1_MouseDown(Object sender, MouseEventArgs e)
{
    ListViewItem selection = listView1.GetItemAt(e.get_X(), e.get_Y());
    // If the user selects an item in the ListView, display
    // the image in the PictureBox.
    if (selection != null) {
        pictureBox1.set_Image(System.Drawing.Image.FromFile(
            selection.get_SubItems().get_Item(1).get_Text()));
    }
} //listView1_MouseDown

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, 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.

Freigeben über

PictureBoxSizeMode-Enumeration

Syntax

Member

Hinweise

Beispiel

Plattformen

Versionsinformationen

.NET Framework

.NET Compact Framework

Siehe auch

Referenz

Zusätzliche Ressourcen