PrintQueue.GetPrintCapabilities Metoda

Definice

Obor názvů:

System.Printing

Sestavení:

System.Printing.dll

PrintCapabilities Získá objekt, který identifikuje možnosti tiskárny nebo zařízení, například zda se tiskne barvou nebo je schopen oboustranný tisk.

Přetížení

Name	Description
GetPrintCapabilities()	PrintCapabilities Získá objekt, který identifikuje schopnosti tiskárny.
GetPrintCapabilities(PrintTicket)	PrintCapabilities Získá objekt, který identifikuje schopnosti tiskárny.

GetPrintCapabilities()

PrintCapabilities Získá objekt, který identifikuje schopnosti tiskárny.

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

public System.Printing.PrintCapabilities GetPrintCapabilities();

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

Public Function GetPrintCapabilities () As PrintCapabilities

Návraty

PrintCapabilities

Objekt PrintCapabilities , který určuje, co tiskárna umí a nemůže dělat, například oboustranné zopořádání nebo automatické sešívání.

Výjimky

PrintQueueException

Objekt PrintCapabilities nelze načíst.

Příklady

Následující příklad ukazuje, jak tuto metodu použít při slučování dvou lístků tisku.

/// <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)

PrintCapabilities Získá objekt, který identifikuje schopnosti tiskárny.

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

Parametry

printTicket

PrintTicket

Tiskový lístek, který poskytuje informace o možnostech tisku.

Návraty

PrintCapabilities

Objekt PrintCapabilities , který určuje, co tiskárna umí a nemůže dělat, například oboustranné zopořádání nebo automatické sešívání.

Výjimky

PrintQueueException

Objekt PrintCapabilities nelze načíst.

ArgumentException

printTicket není ve správném formátu.

Poznámky

Parametr PrintTicket se používá jako základ, na kterém se objekt sestaví PrintCapabilities . Předpokládejme například, že tiskárna podporovala pouze typy médií A a B ze vstupního intervalu 1 a podporovala pouze typ média C ze vstupního intervalu 2. printTicket Pokud parametr zadal vstupní interval 1, pak PrintCapabilities vrácený objekt by zahrnoval všechny tři typy médií, ale sestava by typ C zadal jako "omezené". printTicket Pokud parametr zadal vstupní interval 2, bude PrintCapabilities vrácený objekt obsahovat všechny tři typy médií, ale jako "omezené" by se zadaly typy A a B. Další informace o omezeních najdete ve schématu tisku.

Pokud printTicket je null, použije se UserPrintTicket .