PrintPreviewDialog Costruttore

Definizione

Spazio dei nomi:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Inizializza una nuova istanza della classe PrintPreviewDialog.

public:
 PrintPreviewDialog();

public PrintPreviewDialog ();

Public Sub New ()

Esempio

Nell'esempio di codice seguente viene illustrata l'impostazione PrintPreviewDialog delle Document proprietà e UseAntiAlias . L'esempio presuppone che il modulo contenga un TreeView oggetto denominato TreeView1 contenente TreeNode oggetti. La Tag proprietà di ogni TreeNode oggetto deve essere impostata su un nome documento completo a cui è possibile accedere dal computer che esegue l'esempio. Impostare ogni TreeNode.Text proprietà su una stringa che identifica il file specificato dalla TreeNode.Tag proprietà. Ad esempio, è possibile impostare TreeNode1.Tag su "c:\myDocuments\recipe.doc" e TreeNode1.Text su "recipe.doc". L'esempio presuppone anche che il modulo contenga un nome e un PrintPreviewDialog pulsante denominato Button1PrintPreviewDialog1 . Per eseguire questo esempio, chiamare il InitializePrintPreviewDialog metodo nel costruttore o Load nel gestore eventi del modulo.

   // Declare the dialog.
internal:
   PrintPreviewDialog^ PrintPreviewDialog1;

private:

   // Declare a PrintDocument object named document.
   System::Drawing::Printing::PrintDocument^ document;

   // Initialize the dialog.
   void InitializePrintPreviewDialog()
   {
      
      // Create a new PrintPreviewDialog using constructor.
      this->PrintPreviewDialog1 = gcnew PrintPreviewDialog;
      
      //Set the size, location, and name.
      this->PrintPreviewDialog1->ClientSize = System::Drawing::Size( 400, 300 );
      this->PrintPreviewDialog1->Location = System::Drawing::Point( 29, 29 );
      this->PrintPreviewDialog1->Name = "PrintPreviewDialog1";
      
      // Associate the event-handling method with the 
      // document's PrintPage event.
      this->document->PrintPage += gcnew System::Drawing::Printing::PrintPageEventHandler( this, &Form1::document_PrintPage );
      
      // Set the minimum size the dialog can be resized to.
      this->PrintPreviewDialog1->MinimumSize = System::Drawing::Size( 375, 250 );
      
      // Set the UseAntiAlias property to true, which will allow the 
      // operating system to smooth fonts.
      this->PrintPreviewDialog1->UseAntiAlias = true;
   }

   void Button1_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      if ( TreeView1->SelectedNode != nullptr )
      {
         document->DocumentName = TreeView1->SelectedNode->Tag->ToString();
      }

      // Set the PrintPreviewDialog.Document property to
      // the PrintDocument object selected by the user.
      PrintPreviewDialog1->Document = document;
      
      // Call the ShowDialog method. This will trigger the document's
      //  PrintPage event.
      PrintPreviewDialog1->ShowDialog();
   }

   void document_PrintPage( Object^ /*sender*/, System::Drawing::Printing::PrintPageEventArgs^ e )
   {
      
      // Insert code to render the page here.
      // This code will be called when the PrintPreviewDialog.Show 
      // method is called.
      // The following code will render a simple
      // message on the document in the dialog.
      String^ text = "In document_PrintPage method.";
      System::Drawing::Font^ printFont = gcnew System::Drawing::Font( "Arial",35,System::Drawing::FontStyle::Regular );
      e->Graphics->DrawString( text, printFont, System::Drawing::Brushes::Black, 0, 0 );
   }

// Declare the dialog.
internal PrintPreviewDialog PrintPreviewDialog1;

// Declare a PrintDocument object named document.
private System.Drawing.Printing.PrintDocument document =
    new System.Drawing.Printing.PrintDocument();

// Initialize the dialog.
private void InitializePrintPreviewDialog()
{

    // Create a new PrintPreviewDialog using constructor.
    this.PrintPreviewDialog1 = new PrintPreviewDialog();

    //Set the size, location, and name.
    this.PrintPreviewDialog1.ClientSize = 
        new System.Drawing.Size(400, 300);
    this.PrintPreviewDialog1.Location = 
        new System.Drawing.Point(29, 29);
    this.PrintPreviewDialog1.Name = "PrintPreviewDialog1";
    
    // Associate the event-handling method with the 
    // document's PrintPage event.
    this.document.PrintPage += 
        new System.Drawing.Printing.PrintPageEventHandler
        (document_PrintPage);

    // Set the minimum size the dialog can be resized to.
    this.PrintPreviewDialog1.MinimumSize = 
        new System.Drawing.Size(375, 250);

    // Set the UseAntiAlias property to true, which will allow the 
    // operating system to smooth fonts.
    this.PrintPreviewDialog1.UseAntiAlias = true;
}

private void Button1_Click(object sender, System.EventArgs e)
{

    if (TreeView1.SelectedNode != null)

        // Set the PrintDocument object's name to the selectedNode
        // object's  tag, which in this case contains the 
        // fully-qualified name of the document. This value will 
        // show when the dialog reports progress.
    {
        document.DocumentName = TreeView1.SelectedNode.Tag.ToString();
    }

    // Set the PrintPreviewDialog.Document property to
    // the PrintDocument object selected by the user.
    PrintPreviewDialog1.Document = document;

    // Call the ShowDialog method. This will trigger the document's
    //  PrintPage event.
    PrintPreviewDialog1.ShowDialog();
}

private void document_PrintPage(object sender, 
    System.Drawing.Printing.PrintPageEventArgs e)
{

    // Insert code to render the page here.
    // This code will be called when the PrintPreviewDialog.Show 
    // method is called.

    // The following code will render a simple
    // message on the document in the dialog.
    string text = "In document_PrintPage method.";
    System.Drawing.Font printFont = 
        new System.Drawing.Font("Arial", 35, 
        System.Drawing.FontStyle.Regular);

    e.Graphics.DrawString(text, printFont, 
        System.Drawing.Brushes.Black, 0, 0);
}

' Declare the dialog.
Friend WithEvents PrintPreviewDialog1 As PrintPreviewDialog

' Declare a PrintDocument object named document.
Private WithEvents document As New System.Drawing.Printing.PrintDocument

' Initialize the dialog.
Private Sub InitializePrintPreviewDialog()

    ' Create a new PrintPreviewDialog using constructor.
    Me.PrintPreviewDialog1 = New PrintPreviewDialog

    'Set the size, location, and name.
    Me.PrintPreviewDialog1.ClientSize = New System.Drawing.Size(400, 300)
    Me.PrintPreviewDialog1.Location = New System.Drawing.Point(29, 29)
    Me.PrintPreviewDialog1.Name = "PrintPreviewDialog1"

    ' Set the minimum size the dialog can be resized to.
    Me.PrintPreviewDialog1.MinimumSize = New System.Drawing.Size(375, 250)

    ' Set the UseAntiAlias property to true, which will allow the 
    ' operating system to smooth fonts.
    Me.PrintPreviewDialog1.UseAntiAlias = True
End Sub

Private Sub Button1_Click(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles Button1.Click

    If (TreeView1.SelectedNode IsNot Nothing) Then

        ' Set the PrintDocument object's name to the selectedNode
        ' object's  tag, which in this case contains the 
        ' fully-qualified name of the document. This value will 
        ' show when the dialog reports progress.
        document.DocumentName = TreeView1.SelectedNode.Tag
    End If

    ' Set the PrintPreviewDialog.Document property to
    ' the PrintDocument object selected by the user.
    PrintPreviewDialog1.Document = document

    ' Call the ShowDialog method. This will trigger the document's
    '  PrintPage event.
    PrintPreviewDialog1.ShowDialog()
End Sub

Private Sub document_PrintPage(ByVal sender As Object, _
    ByVal e As System.Drawing.Printing.PrintPageEventArgs) _
        Handles document.PrintPage

    ' Insert code to render the page here.
    ' This code will be called when the PrintPreviewDialog.Show 
    ' method is called.

    ' The following code will render a simple
    ' message on the document in the dialog.
    Dim text As String = "In document_PrintPage method."
    Dim printFont As New System.Drawing.Font _
        ("Arial", 35, System.Drawing.FontStyle.Regular)

    e.Graphics.DrawString(text, printFont, _
        System.Drawing.Brushes.Black, 0, 0)

End Sub

Commenti

Quando si crea un'istanza di PrintPreviewDialog, la Document proprietà viene inizializzata in null. È possibile modificare il valore per questa proprietà in fase di esecuzione.

Vedi anche

• PrintDocument
• PrintPreviewControl