PrintDialog.ShowHelp Egenskap

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

Egenskapsvärde

trueom hjälpknappen visas; annars . false Standardvärdet är false.

Exempel

I följande kodexempel visas hur du använder kontrollinställningen PrintDialogAllowSomePagesegenskaperna , ShowHelpoch Document . Om du vill köra det här exemplet klistrar du in följande kod i ett formulär som innehåller en PrintDialog kontroll med namnet PrintDialog1 och en knapp med namnet Button1. Det här exemplet kräver att knappens Click händelse och PrintPage händelsen docToPrint för har anslutits till de metoder för händelsehantering som definierats i det här exemplet.

// 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

Kommentarer

Den här egenskapen har markerats som föråldrad i Windows 2000 och påverkar inte den här och senare versionen av Windows.

Se även

• ShowNetwork