PrintTicket 构造函数

定义

命名空间:

System.Printing

程序集:

ReachFramework.dll

初始化 PrintTicket 类的新实例。

重载

PrintTicket()	初始化 PrintTicket 类的新实例。
PrintTicket(Stream)	使用符合 XML 打印架构的 XML 流（其中包含 PrintTicket 文档）初始化 PrintTicket 类的新实例。

PrintTicket()

初始化 PrintTicket 类的新实例。

public:
 PrintTicket();

public PrintTicket ();

Public Sub New ()

示例

以下示例演示如何在合并两个打印票证时使用此构造函数。

/// <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

PrintTicket(Stream)

使用符合 XML 打印架构的 XML 流（其中包含 PrintTicket 文档）初始化 PrintTicket 类的新实例。

public:
 PrintTicket(System::IO::Stream ^ xmlStream);

public PrintTicket (System.IO.Stream xmlStream);

new System.Printing.PrintTicket : System.IO.Stream -> System.Printing.PrintTicket

Public Sub New (xmlStream As Stream)

参数

xmlStream

Stream

描述打印作业且符合打印架构的 XML 流。

例外

ArgumentNullException

xmlStream 为 null。

FormatException

xmlStream 为无效 XML。

注解

构造函数不会将流的读写位置重置回其原始位置。 因此，应在调用构造函数后立即重置它。

整个 PrintTicket 文档存储在 对象的非公共字段中，包括其中表示不常见功能的 XML 元素，这些特征不由类的任何公共属性 PrintTicket 表示。 事实上，如果生成 PrintTicket 文档的驱动程序使用的是 打印架构的专用扩展，则私下定义的标记也会存储为非公共 PrintTicket 文档的一部分。

文档的私有部分（如果有）不会由构造函数验证，但会验证所有 打印架构定义的部件，包括未由类的任何公共属性表示的部分 PrintTicket 。 因此， FormatException 即使与公共属性对应的所有 XML 标记都有效，也可能引发 。

写入 的任何属性 PrintTicket 时，此非公共 PrintTicket 文档也会更改。

正是此非公共 PrintTicket 文档由 GetXmlStream 和 SaveTo 方法返回。

另请参阅

• 打印架构