PrintQueue.DefaultPrintTicket Propriedade

Definição

Namespace:

System.Printing

Assembly:

System.Printing.dll

Obtém ou define as opções de impressora padrão associadas a essa PrintQueue.

public:
 virtual property System::Printing::PrintTicket ^ DefaultPrintTicket { System::Printing::PrintTicket ^ get(); void set(System::Printing::PrintTicket ^ value); };

public virtual System.Printing.PrintTicket DefaultPrintTicket { get; set; }

member this.DefaultPrintTicket : System.Printing.PrintTicket with get, set

Public Overridable Property DefaultPrintTicket As PrintTicket

Valor da propriedade

PrintTicket

O PrintTicket padrão para a fila de impressão; ou null se ocorreu um erro na fila de impressão.

Exemplos

O exemplo a seguir mostra como usar essa propriedade enquanto testa os recursos de uma impressora e configura um trabalho de impressão para tirar proveito delas.

// ---------------------- GetPrintTicketFromPrinter -----------------------
/// <summary>
///   Returns a PrintTicket based on the current default printer.</summary>
/// <returns>
///   A PrintTicket for the current local default printer.</returns>
PrintTicket^ GetPrintTicketFromPrinter ()
{
   PrintQueue^ printQueue = nullptr;

   LocalPrintServer^ localPrintServer = gcnew LocalPrintServer();

   // Retrieving collection of local printer on user machine
   PrintQueueCollection^ localPrinterCollection = localPrintServer->GetPrintQueues();

   System::Collections::IEnumerator^ localPrinterEnumerator = localPrinterCollection->GetEnumerator();

   if (localPrinterEnumerator->MoveNext())
   {
      // Get PrintQueue from first available printer
      printQueue = ((PrintQueue^)localPrinterEnumerator->Current);
   } else
   {
      return nullptr;
   }
   // Get default PrintTicket from printer
   PrintTicket^ printTicket = printQueue->DefaultPrintTicket;

   PrintCapabilities^ printCapabilities = printQueue->GetPrintCapabilities();

   // Modify PrintTicket
   if (printCapabilities->CollationCapability->Contains(Collation::Collated))
   {
      printTicket->Collation = Collation::Collated;
   }
   if (printCapabilities->DuplexingCapability->Contains(Duplexing::TwoSidedLongEdge))
   {
      printTicket->Duplexing = Duplexing::TwoSidedLongEdge;
   }
   if (printCapabilities->StaplingCapability->Contains(Stapling::StapleDualLeft))
   {
      printTicket->Stapling = Stapling::StapleDualLeft;
   }
   return printTicket;
};// end:GetPrintTicketFromPrinter()

// ---------------------- GetPrintTicketFromPrinter -----------------------
/// <summary>
///   Returns a PrintTicket based on the current default printer.</summary>
/// <returns>
///   A PrintTicket for the current local default printer.</returns>
private PrintTicket GetPrintTicketFromPrinter()
{
    PrintQueue printQueue = null;

    LocalPrintServer localPrintServer = new LocalPrintServer();

    // Retrieving collection of local printer on user machine
    PrintQueueCollection localPrinterCollection =
        localPrintServer.GetPrintQueues();

    System.Collections.IEnumerator localPrinterEnumerator =
        localPrinterCollection.GetEnumerator();

    if (localPrinterEnumerator.MoveNext())
    {
        // Get PrintQueue from first available printer
        printQueue = (PrintQueue)localPrinterEnumerator.Current;
    }
    else
    {
        // No printer exist, return null PrintTicket
        return null;
    }

    // Get default PrintTicket from printer
    PrintTicket printTicket = printQueue.DefaultPrintTicket;

    PrintCapabilities printCapabilities = printQueue.GetPrintCapabilities();

    // Modify PrintTicket
    if (printCapabilities.CollationCapability.Contains(Collation.Collated))
    {
        printTicket.Collation = Collation.Collated;
    }

    if ( printCapabilities.DuplexingCapability.Contains(
            Duplexing.TwoSidedLongEdge) )
    {
        printTicket.Duplexing = Duplexing.TwoSidedLongEdge;
    }

    if (printCapabilities.StaplingCapability.Contains(Stapling.StapleDualLeft))
    {
        printTicket.Stapling = Stapling.StapleDualLeft;
    }

    return printTicket;
}// end:GetPrintTicketFromPrinter()

' ---------------------- GetPrintTicketFromPrinter -----------------------
''' <summary>
'''   Returns a PrintTicket based on the current default printer.</summary>
''' <returns>
'''   A PrintTicket for the current local default printer.</returns>
Private Function GetPrintTicketFromPrinter() As PrintTicket
    Dim printQueue As PrintQueue = Nothing

    Dim localPrintServer As New LocalPrintServer()

    ' Retrieving collection of local printer on user machine
    Dim localPrinterCollection As PrintQueueCollection = localPrintServer.GetPrintQueues()

    Dim localPrinterEnumerator As System.Collections.IEnumerator = localPrinterCollection.GetEnumerator()

    If localPrinterEnumerator.MoveNext() Then
        ' Get PrintQueue from first available printer
        printQueue = CType(localPrinterEnumerator.Current, PrintQueue)
    Else
        ' No printer exist, return null PrintTicket
        Return Nothing
    End If

    ' Get default PrintTicket from printer
    Dim printTicket As PrintTicket = printQueue.DefaultPrintTicket

    Dim printCapabilities As PrintCapabilities = printQueue.GetPrintCapabilities()

    ' Modify PrintTicket
    If printCapabilities.CollationCapability.Contains(Collation.Collated) Then
        printTicket.Collation = Collation.Collated
    End If

    If printCapabilities.DuplexingCapability.Contains(Duplexing.TwoSidedLongEdge) Then
        printTicket.Duplexing = Duplexing.TwoSidedLongEdge
    End If

    If printCapabilities.StaplingCapability.Contains(Stapling.StapleDualLeft) Then
        printTicket.Stapling = Stapling.StapleDualLeft
    End If

    Return printTicket
End Function ' end:GetPrintTicketFromPrinter()

Comentários

O padrão PrintTicket especifica opções de trabalho de impressão, como CopyCount, PageOrientation, Duplexing, Staplinge outras.

Cada PrintQueue um mantém seu próprio DefaultPrintTicket.

Na operação normal, a DefaultPrintTicket propriedade retorna um PrintTicket. Se o PrintQueue detectar um estado inválido, DefaultPrintTicket retornará null. Se DefaultPrintTicket retornar null, o aplicativo deverá exibir uma caixa de diálogo de usuário informativo informando que ocorreu um erro nessa fila de impressão e que o trabalho de impressão deve ser reiniciado com a saída direcionada para uma fila de impressão diferente.

Obter ou definir a DefaultPrintTicket propriedade não valida o PrintTicket. O MergeAndValidatePrintTicket método pode ser usado para validar um PrintTicket.

Confira também

• UserPrintTicket
• DefaultPriority