PrintDialog.ShowHelp Proprietà

public:
 property bool ShowHelp { bool get(); void set(bool value); };

public bool ShowHelp { get; set; }

member this.ShowHelp : bool with get, set

Public Property ShowHelp As Boolean

Valore della proprietà

true se viene visualizzato il pulsante ? in caso contrario, false. Il valore predefinito è false.

Esempio

Nell'esempio di codice seguente viene illustrato l'uso del PrintDialog controllo che imposta le AllowSomePagesproprietà , ShowHelpe Document . Per eseguire questo esempio, incollare il codice seguente in un modulo contenente un PrintDialog controllo denominato PrintDialog1 e un pulsante denominato Button1. In questo esempio è necessario che l'evento del Click pulsante e l'evento PrintPage di siano stati connessi ai metodi di docToPrint gestione degli eventi definiti in questo esempio.

// Declare the PrintDocument object.
System::Drawing::Printing::PrintDocument^ docToPrint;

// This method will set properties on the PrintDialog object and
// then display the dialog.
void Button1_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   // Allow the user to choose the page range he or she would
   // like to print.
   PrintDialog1->AllowSomePages = true;
   
   // Show the help button.
   PrintDialog1->ShowHelp = true;
   
   // Set the Document property to the PrintDocument for 
   // which the PrintPage Event has been handled. To display the
   // dialog, either this property or the PrinterSettings property 
   // must be set 
   PrintDialog1->Document = docToPrint;
   if ( docToPrint == nullptr )
         System::Windows::Forms::MessageBox::Show(  "null" );

   ;
   ;
   if ( PrintDialog1 == nullptr )
         System::Windows::Forms::MessageBox::Show(  "pnull" );

   ;
   ;
   System::Windows::Forms::DialogResult result = PrintDialog1->ShowDialog();
   System::Windows::Forms::MessageBox::Show( result.ToString() );
   ;
   ;
   
   // If the result is OK then print the document.
   if ( result == ::DialogResult::OK )
   {
      docToPrint->Print();
   }

}

// The PrintDialog will print the document
// by handling the document's PrintPage event.
void document_PrintPage( Object^ /*sender*/, System::Drawing::Printing::PrintPageEventArgs^ e )
{
   // Insert code to render the page here.
   // This code will be called when the control is drawn.
   // The following code will render a simple
   // message on the printed document.
   String^ text = "In document_PrintPage method.";
   System::Drawing::Font^ printFont = gcnew System::Drawing::Font( "Arial",35,System::Drawing::FontStyle::Regular );
   
   // Draw the content.
   e->Graphics->DrawString( text, printFont, System::Drawing::Brushes::Black, 10, 10 );
}

// Declare the PrintDocument object.
private System.Drawing.Printing.PrintDocument docToPrint = 
    new System.Drawing.Printing.PrintDocument();

// This method will set properties on the PrintDialog object and
// then display the dialog.
private void Button1_Click(System.Object sender, 
    System.EventArgs e)
{

    // Allow the user to choose the page range he or she would
    // like to print.
    PrintDialog1.AllowSomePages = true;

    // Show the help button.
    PrintDialog1.ShowHelp = true;

    // Set the Document property to the PrintDocument for 
    // which the PrintPage Event has been handled. To display the
    // dialog, either this property or the PrinterSettings property 
    // must be set 
    PrintDialog1.Document = docToPrint;

    DialogResult result = PrintDialog1.ShowDialog();

    // If the result is OK then print the document.
    if (result==DialogResult.OK)
    {
        docToPrint.Print();
    }
}

// The PrintDialog will print the document
// by handling the document's PrintPage event.
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 control is drawn.

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

    // Draw the content.
    e.Graphics.DrawString(text, printFont, 
        System.Drawing.Brushes.Black, 10, 10);
}

' Declare the PrintDocument object.
Private WithEvents docToPrint As New Printing.PrintDocument

' This method will set properties on the PrintDialog object and
' then display the dialog.
Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click

    ' Allow the user to choose the page range he or she would
    ' like to print.
    PrintDialog1.AllowSomePages = True

    ' Show the help button.
    PrintDialog1.ShowHelp = True

    ' Set the Document property to the PrintDocument for 
    ' which the PrintPage Event has been handled. To display the
    ' dialog, either this property or the PrinterSettings property 
    ' must be set 
    PrintDialog1.Document = docToPrint

    Dim result As DialogResult = PrintDialog1.ShowDialog()

    ' If the result is OK then print the document.
    If (result = DialogResult.OK) Then
        docToPrint.Print()
    End If

End Sub

' The PrintDialog will print the document
' by handling the document's PrintPage event.
Private Sub document_PrintPage(ByVal sender As Object, _
   ByVal e As System.Drawing.Printing.PrintPageEventArgs) _
       Handles docToPrint.PrintPage

    ' Insert code to render the page here.
    ' This code will be called when the control is drawn.

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

    ' Draw the content.
    e.Graphics.DrawString(text, printFont, _
        System.Drawing.Brushes.Black, 10, 10)
End Sub

Commenti

Questa proprietà è stata contrassegnata come obsoleta in Windows 2000 e non influisce su questa e versioni successive di Windows.

Si applica a

Vedi anche

• ShowNetwork