Duplexing 枚举

定义

命名空间:

System.Printing

程序集:

ReachFramework.dll

指定打印机是使用单面打印，还是使用某种类型的双面（双工打印）打印。

public enum class Duplexing

public enum Duplexing

type Duplexing = 

Public Enum Duplexing

继承

Object

ValueType

Enum

Duplexing

字段

OneSided	1	仅在每张纸的单面上输出打印。
TwoSidedLongEdge	3	在每张纸的两个面上输出打印，其沿着平行于 MediaSizeHeight 的边缘翻转。
TwoSidedShortEdge	2	在每张纸的两个面上输出打印，其沿着平行于 MediaSizeWidth 的边缘翻转。
Unknown	0	该功能（其选项由此枚举表示）设置为未在 打印架构中定义的选项。

示例

以下示例演示如何测试打印机的功能，以及如何配置打印作业以利用它们。 .

// ---------------------- 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()

注解

使用此类型的值主要用于以下目的：

• 作为 集合的成员 DuplexingCapability （是 的 PrintCapabilities属性），这些值指示打印机支持的单面打印和双面打印的类型。

• 作为 的 属性PrintTicket的值Duplexing，它们指示打印机使用单面打印或某种双面打印。

未知值永远不会在 对象的属性PrintCapabilities中使用。

切勿将 PrintTicket 属性设置为 Unknown。 如果其他 PrintTicket 某个生成应用程序创建了一个 PrintTicket 文档 ，该文档将双工功能设置为无法识别的双工选项 (即 打印架构) 中未定义的选项，则 PrintTicket 应用程序中使用该文档构造的对象将具有 未知 作为 属性的值 Duplexing 。

PrintTicket尽管 无法继承 和 PrintCapabilities 类，但可以扩展打印架构以识别 在 或 PrintCapabilities 类中PrintTicket未考虑的打印设备功能。 有关详细信息，请参阅 如何：扩展打印架构和创建新的打印系统类。

另请参阅

• PrintCapabilities
• PrintTicket