ImageResolution Property

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public TwainImageResolutionProperties ImageResolution {get; set;}

'Declaration
 
Public Property ImageResolution As TwainImageResolutionProperties

'Usage
 
Dim instance As TwainProperties
Dim value As TwainImageResolutionProperties
 
instance.ImageResolution = value
 
value = instance.ImageResolution

public TwainImageResolutionProperties ImageResolution {get; set;}

 get_ImageResolution();
 set_ImageResolution(value);

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

Property Value

TwainImageResolutionProperties structure contains Image effects data class.

This property should be called after calling the get TwainSession.Properties property After you update this structure, you can update the TWAIN source by calling the set TwainSession.Properties property.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Public Sub twainSession_SetProperty(ByVal sender As Object, ByVal e As TwainSetPropertyEventArgs)
   Dim msg As String = String.Format("Capability %d\nStatus = %d", e.Capability, e.Status)
   e.Stop = False
End Sub

Public Sub ImageResolutionPropertyExample(ByVal parent As IWin32Window)
   Try
      Dim session As TwainSession = New TwainSession()
      session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None)

      session.EnableSetPropertyEvent = True
      AddHandler session.SetProperty, AddressOf twainSession_SetProperty

      Dim props As TwainProperties = session.Properties
      Dim imageRes As TwainImageResolutionProperties = props.ImageResolution

      imageRes.UnitOfResolution = TwainImageUnit.Inches
      imageRes.BitsPerPixel = 1
      imageRes.HorizontalResolution = 150
      imageRes.VerticalResolution = 150
      imageRes.XScaling = 1
      imageRes.YScaling = 1
      imageRes.RotationAngle = 90

      imageRes.LeftMargin = 0
      imageRes.RightMargin = 0
      imageRes.TopMargin = 200
      imageRes.BottomMargin = 200

      props.EnableAutoFeed = True
      props.MaximumNumberOfPages = -1

      Dim buffer As String = String.Format("Duplex state = {0}", session.DuplexScanningMode.ToString())
      MessageBox.Show(buffer)

      props.ImageResolution = imageRes
      session.Properties = props
      session.Shutdown()
   Catch ex As Exception
      MessageBox.Show(ex.Message)
   End Try
End Sub

void session_SetProperty(object sender, TwainSetPropertyEventArgs e)
{
   string msg = string.Format("Capability %d\nStatus = %d", e.Capability, e.Status);
   e.Stop = false;
}

public void ImageResolutionPropertyExample(IWin32Window parent)
{
   try
   {
      TwainSession session = new TwainSession();
      session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None);

      session.EnableSetPropertyEvent = true;
      session.SetProperty += new EventHandler<TwainSetPropertyEventArgs>(session_SetProperty);
      TwainProperties props = session.Properties;
      TwainImageResolutionProperties imageRes = props.ImageResolution;

      imageRes.UnitOfResolution = TwainImageUnit.Inches;
      imageRes.BitsPerPixel = 1;
      imageRes.HorizontalResolution = 150;
      imageRes.VerticalResolution = 150;
      imageRes.XScaling = 1;
      imageRes.YScaling = 1;
      imageRes.RotationAngle = 90;

      imageRes.LeftMargin = 0;
      imageRes.RightMargin = 0;
      imageRes.TopMargin = 200;
      imageRes.BottomMargin = 200;

      props.EnableAutoFeed = true;
      props.MaximumNumberOfPages = -1;

      string buffer = string.Format("Duplex state = {0}", session.DuplexScanningMode.ToString());
      MessageBox.Show(buffer);

      props.ImageResolution = imageRes;
      session.Properties = props;
      session.Shutdown();
   }
   catch (Exception ex)
   {
      MessageBox.Show(ex.Message);
   }
}

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

TwainProperties Structure
TwainProperties Members