PrintQueue.GetPrintCapabilities 方法

定义

命名空间:

System.Printing

程序集:

System.Printing.dll

获取一个 PrintCapabilities 对象，该对象标识打印机或设备的功能，如是否可彩色打印或双面打印。

重载

GetPrintCapabilities()	获取用于标识打印机功能的 PrintCapabilities 对象。
GetPrintCapabilities(PrintTicket)	获取用于标识打印机功能的 PrintCapabilities 对象。

GetPrintCapabilities()

获取用于标识打印机功能的 PrintCapabilities 对象。

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

public System.Printing.PrintCapabilities GetPrintCapabilities ();

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

Public Function GetPrintCapabilities () As PrintCapabilities

返回

PrintCapabilities

用于指定打印机可执行和不可执行的操作（如双面复印或自动装订）的 PrintCapabilities 对象。

例外

PrintQueueException

未能检索到 PrintCapabilities 对象。

示例

以下示例演示如何在合并两个打印票证时使用此方法。

/// <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)

获取用于标识打印机功能的 PrintCapabilities 对象。

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

参数

printTicket

PrintTicket

提供打印功能报告根据的打印票证。

返回

PrintCapabilities

用于指定打印机可执行和不可执行的操作（如双面复印或自动装订）的 PrintCapabilities 对象。

例外

PrintQueueException

未能检索到 PrintCapabilities 对象。

ArgumentException

printTicket 不符合标准格式。

注解

参数 PrintTicket 用作构造 PrintCapabilities 对象的基础。 例如，假设打印机仅支持输入箱 1 中的媒体类型 A 和 B，并且仅支持输入箱 2 中的媒体类型 C。 printTicket如果参数指定的输入箱 1，则PrintCapabilities返回的对象将包含所有三种媒体类型，但它会将类型 C 报告为“约束”。printTicket如果 参数指定输入箱 2，则PrintCapabilities返回的对象将包括所有三种媒体类型，但它会将类型 A 和 B 报告为“约束”。有关约束的详细信息，请参阅打印架构。

如果 printTicket 为 null， UserPrintTicket 则使用 。