PageSize Свойство (Device)

В этом разделе

Gets or sets the page size for current scan session.

Синтаксис

Visual Basic
C#
Управляемые расширения для C++
C++/CLI

'Declaration

Public Property PageSize As PageSize

public PageSize PageSize { get; set; }

public: __property PageSize get_PageSize();
public: __property void set_PageSize(
   PageSize value
);

public:
property PageSize PageSize {
   PageSize get();
   void set(PageSize value);
}

Исключения

Исключение	Описание
TwainInvalidStateException	Thrown if device is in wrong state.
TwainDeviceCapabilityException	Thrown if device does not support capability.
DebuggerException	Thrown if the .NET debugger is used and the function evaluation requires all threads to run.

Ремарки

Call this property only when device is opened (State == DeviceState.Opened).

Supported pages sizes can be received by the GetSupportedPageSizes method.

This property has effect only if you do not use User Interface (ShowUI=False).

Пример

This C#/VB.NET code shows how to acquire A4 black-white images from the device.

VB.NET


Public Sub ScanPage(device As Vintasoft.Twain.Device)
    device.ShowUI = False
    device.DisableAfterAcquire = True

    device.Open()
    device.PixelType = Vintasoft.Twain.PixelType.BW
    device.PageSize = Vintasoft.Twain.PageSize.A4
    device.PageOrientation = Vintasoft.Twain.PageOrientation.Landscape
    device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches
    device.Resolution = New Vintasoft.Twain.Resolution(300.0F, 300.0F)

    device.Acquire()
End Sub


public void ScanPage(Vintasoft.Twain.Device device)
{
    device.ShowUI = false;
    device.DisableAfterAcquire = true;

    device.Open();
    device.PixelType = Vintasoft.Twain.PixelType.BW;
    device.PageSize = Vintasoft.Twain.PageSize.A4;
    device.PageOrientation = Vintasoft.Twain.PageOrientation.Landscape;
    device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches;
    device.Resolution = new Vintasoft.Twain.Resolution(300f, 300f);

    device.Acquire();
}

Требования

Целевые платформы: .NET 9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

Смотрите также

Справочник

Device Class
Члены типа Device

GetSupportedPageSizes
Open

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