PrintQueue.GetPrintCapabilities Método

Definición

Espacio de nombres:

System.Printing

Ensamblado:

System.Printing.dll

Obtiene un objeto PrintCapabilities que identifica las capacidades de la impresora o dispositivo, por ejemplo si imprime en color o a dos caras.

Sobrecargas

GetPrintCapabilities()	Obtiene un objeto PrintCapabilities que identifica las capacidades de la impresora.
GetPrintCapabilities(PrintTicket)	Obtiene un objeto PrintCapabilities que identifica las capacidades de la impresora.

GetPrintCapabilities()

Obtiene un objeto PrintCapabilities que identifica las capacidades de la impresora.

public:
 System::Printing::PrintCapabilities ^ GetPrintCapabilities();

public System.Printing.PrintCapabilities GetPrintCapabilities ();

member this.GetPrintCapabilities : unit -> System.Printing.PrintCapabilities

Public Function GetPrintCapabilities () As PrintCapabilities

Devoluciones

PrintCapabilities

Objeto PrintCapabilities que especifica lo que la impresora puede y no puede hacer, como imprimir a doble cara o el grapado automático.

Excepciones

PrintQueueException

No se pudo recuperar el objeto PrintCapabilities.

Ejemplos

En el ejemplo siguiente se muestra cómo usar este método al combinar dos vales de impresión.

/// <summary>
/// Changes the user-default PrintTicket setting of the specified print queue.
/// </summary>
/// <param name="queue">the printer whose user-default PrintTicket setting needs to be changed</param>
static private void ChangePrintTicketSetting(PrintQueue queue)
{
    //
    // Obtain the printer's PrintCapabilities so we can determine whether or not
    // duplexing printing is supported by the printer.
    //
    PrintCapabilities printcap = queue.GetPrintCapabilities();

    //
    // The printer's duplexing capability is returned as a read-only collection of duplexing options
    // that can be supported by the printer. If the collection returned contains the duplexing
    // option we want to set, it means the duplexing option we want to set is supported by the printer,
    // so we can make the user-default PrintTicket setting change.
    //
    if (printcap.DuplexingCapability.Contains(Duplexing.TwoSidedLongEdge))
    {
        //
        // To change the user-default PrintTicket, we can first create a delta PrintTicket with
        // the new duplexing setting.
        //
        PrintTicket deltaTicket = new PrintTicket();
        deltaTicket.Duplexing = Duplexing.TwoSidedLongEdge;

        //
        // Then merge the delta PrintTicket onto the printer's current user-default PrintTicket,
        // and validate the merged PrintTicket to get the new PrintTicket we want to set as the
        // printer's new user-default PrintTicket.
        //
        ValidationResult result = queue.MergeAndValidatePrintTicket(queue.UserPrintTicket, deltaTicket);

        //
        // The duplexing option we want to set could be constrained by other PrintTicket settings
        // or device settings. We can check the validated merged PrintTicket to see whether the
        // the validation process has kept the duplexing option we want to set unchanged.
        //
        if (result.ValidatedPrintTicket.Duplexing == Duplexing.TwoSidedLongEdge)
        {
            //
            // Set the printer's user-default PrintTicket and commit the set operation.
            //
            queue.UserPrintTicket = result.ValidatedPrintTicket;
            queue.Commit();
            Console.WriteLine("PrintTicket new duplexing setting is set on '{0}'.", queue.FullName);
        }
        else
        {
            //
            // The duplexing option we want to set has been changed by the validation process
            // when it was resolving setting constraints.
            //
            Console.WriteLine("PrintTicket new duplexing setting is constrained on '{0}'.", queue.FullName);
        }
    }
    else
    {
        //
        // If the printer doesn't support the duplexing option we want to set, skip it.
        //
        Console.WriteLine("PrintTicket new duplexing setting is not supported on '{0}'.", queue.FullName);
    }
}

''' <summary>
''' Changes the user-default PrintTicket setting of the specified print queue.
''' </summary>
''' <param name="queue">the printer whose user-default PrintTicket setting needs to be changed</param>
Private Shared Sub ChangePrintTicketSetting(ByVal queue As PrintQueue)
    '
    ' Obtain the printer's PrintCapabilities so we can determine whether or not
    ' duplexing printing is supported by the printer.
    '
    Dim printcap As PrintCapabilities = queue.GetPrintCapabilities()

    '
    ' The printer's duplexing capability is returned as a read-only collection of duplexing options
    ' that can be supported by the printer. If the collection returned contains the duplexing
    ' option we want to set, it means the duplexing option we want to set is supported by the printer,
    ' so we can make the user-default PrintTicket setting change.
    '
    If printcap.DuplexingCapability.Contains(Duplexing.TwoSidedLongEdge) Then
        '
        ' To change the user-default PrintTicket, we can first create a delta PrintTicket with
        ' the new duplexing setting.
        '
        Dim deltaTicket As New PrintTicket()
        deltaTicket.Duplexing = Duplexing.TwoSidedLongEdge

        '
        ' Then merge the delta PrintTicket onto the printer's current user-default PrintTicket,
        ' and validate the merged PrintTicket to get the new PrintTicket we want to set as the
        ' printer's new user-default PrintTicket.
        '
        Dim result As ValidationResult = queue.MergeAndValidatePrintTicket(queue.UserPrintTicket, deltaTicket)

        '
        ' The duplexing option we want to set could be constrained by other PrintTicket settings
        ' or device settings. We can check the validated merged PrintTicket to see whether the
        ' the validation process has kept the duplexing option we want to set unchanged.
        '
        If result.ValidatedPrintTicket.Duplexing = Duplexing.TwoSidedLongEdge Then
            '
            ' Set the printer's user-default PrintTicket and commit the set operation.
            '
            queue.UserPrintTicket = result.ValidatedPrintTicket
            queue.Commit()
            Console.WriteLine("PrintTicket new duplexing setting is set on '{0}'.", queue.FullName)
        Else
            '
            ' The duplexing option we want to set has been changed by the validation process
            ' when it was resolving setting constraints.
            '
            Console.WriteLine("PrintTicket new duplexing setting is constrained on '{0}'.", queue.FullName)
        End If
    Else
        '
        ' If the printer doesn't support the duplexing option we want to set, skip it.
        '
        Console.WriteLine("PrintTicket new duplexing setting is not supported on '{0}'.", queue.FullName)
    End If
End Sub

GetPrintCapabilities(PrintTicket)

Obtiene un objeto PrintCapabilities que identifica las capacidades de la impresora.

public:
 System::Printing::PrintCapabilities ^ GetPrintCapabilities(System::Printing::PrintTicket ^ printTicket);

public System.Printing.PrintCapabilities GetPrintCapabilities (System.Printing.PrintTicket printTicket);

member this.GetPrintCapabilities : System.Printing.PrintTicket -> System.Printing.PrintCapabilities

Public Function GetPrintCapabilities (printTicket As PrintTicket) As PrintCapabilities

Parámetros

printTicket

PrintTicket

Solicitud de impresión que proporciona la base sobre la que se informa de las capacidades de impresión.

Devoluciones

PrintCapabilities

Objeto PrintCapabilities que especifica lo que la impresora puede y no puede hacer, como imprimir a doble cara o el grapado automático.

Excepciones

PrintQueueException

No se pudo recuperar el objeto PrintCapabilities.

ArgumentException

printTicket no está bien formado.

Comentarios

El PrintTicket parámetro se usa como base para construir el PrintCapabilities objeto . Por ejemplo, supongamos que la impresora solo admite los tipos de medios A y B de la papelera de entrada 1 y solo admite el tipo de medio C de la papelera de entrada 2. Si el parámetro especificó el printTicket contenedor de entrada 1, el PrintCapabilities objeto que se devuelve incluiría los tres tipos de medios, pero notificaría el tipo C como "restringido". Si el parámetro especificó la printTicket ubicación de entrada 2, el PrintCapabilities objeto que se devuelve incluiría los tres tipos de medios, pero notificaría los tipos A y B como "restringidos". Consulte El esquema de impresión para obtener más información sobre las restricciones.

Si printTicket es null, UserPrintTicket se usa .