PrintPreviewDialog Konstruktor

Definice

Obor názvů:

System.Windows.Forms

Sestavení:

System.Windows.Forms.dll

Inicializuje novou instanci PrintPreviewDialog třídy .

public:
 PrintPreviewDialog();

public PrintPreviewDialog ();

Public Sub New ()

Příklady

Následující příklad kódu ukazuje PrintPreviewDialog nastavení DocumentUseAntiAlias a vlastnosti. V příkladu se předpokládá, že formulář obsahuje TreeView objekt s názvem TreeView1 , který obsahuje TreeNode objekty. Vlastnost Tag každého TreeNode objektu musí být nastavena na plně kvalifikovaný název dokumentu, ke kterému má počítač, který příklad spouští, přístup. Každou TreeNode.Text vlastnost nastavte na řetězec, který identifikuje soubor určený TreeNode.Tag vlastností . Můžete například nastavit TreeNode1.Tag "c:\myDocuments\recipe.doc" a TreeNode1.Text "recipe.doc". Příklad také předpokládá, že formulář obsahuje pojmenovaný PrintPreviewDialogPrintPreviewDialog1 a tlačítko s názvem Button1. Chcete-li spustit tento příklad, zavolejte metodu InitializePrintPreviewDialog v konstruktoru formuláře nebo Load obslužné rutině události.

   // 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

Poznámky

Při vytváření instance objektu PrintPreviewDialogje vlastnost inicializována Document do null. Hodnotu této vlastnosti můžete změnit za běhu.

Viz také

• PrintDocument
• PrintPreviewControl