WiaDeviceType Enumeration

Summary

Used with WiaSession.SelectedDeviceType property and WiaSession.SelectDeviceDlg and WiaSession.AcquireSimple methods. For more information refer to WIA_DIP_DEV_TYPE property ID in Microsoft Windows SDK Documentation.

Syntax

C++/CLI

Python

public enum WiaDeviceType

public enum class WiaDeviceType : public System.Enum, System.IComparable, System.IConvertible, System.IFormattable

class WiaDeviceType(Enum): 
   Default = 0 
   Scanner = 1 
   DigitalCamera = 2 
   StreamingVideo = 3

Members

Value	Member	Description
0	Default	Generic WIA device. During device enumerations, this constant is used to enumerate all WIA devices. This is the default value.
1	Scanner	Scanner device.
2	DigitalCamera	Camera device (not supported by Windows Vista and later).
3	StreamingVideo	Video device (not supported by either Windows Server 2003, Windows Vista, or later).

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Wia; 
 
 
      
public void IsAvailableExample(IntPtr parent) 
{ 
   if (!WiaSession.IsAvailable(WiaVersion.Version1)) 
   { 
      Console.WriteLine("WIA version 1.0 not installed."); 
      return; 
   } 
 
   WiaSession wiaSession = new WiaSession(); 
   wiaSession.Startup(WiaVersion.Version1); 
 
   DialogResult res = wiaSession.SelectDeviceDlg(parent, WiaDeviceType.Default, WiaSelectSourceFlags.NoDefault); 
   if (res != DialogResult.OK) 
   { 
      Console.WriteLine("Error selecting WIA device."); 
      wiaSession.Shutdown(); 
      return; 
   } 
 
   // Initialize and fill the required fields from the WiaAcquireOptions structure 
   WiaAcquireOptions wiaAcquireOptions = WiaAcquireOptions.Empty; 
   wiaAcquireOptions.MemoryBufferSize = 32 * 1024; 
   wiaAcquireOptions.DoubleBuffer = true; 
   wiaSession.AcquireOptions = wiaAcquireOptions; 
 
   wiaSession.AcquireEvent += new EventHandler<WiaAcquireEventArgs>(wiaSession_AcquireEvent); 
 
   wiaSession.Acquire(parent, null, WiaAcquireFlags.ShowUserInterface | WiaAcquireFlags.UseCommonUI); 
 
   wiaSession.AcquireEvent -= new EventHandler<WiaAcquireEventArgs>(wiaSession_AcquireEvent); 
   wiaSession.Shutdown(); 
} 
 
public void wiaSession_AcquireEvent(object sender, WiaAcquireEventArgs e) 
{ 
   Application.DoEvents(); 
 
   if ((e.Flags & WiaAcquiredPageFlags.StartOfPage) == WiaAcquiredPageFlags.StartOfPage) 
      Console.WriteLine("Beginning of data transfer."); 
   else if ((e.Flags & WiaAcquiredPageFlags.EndOfPage) == WiaAcquiredPageFlags.EndOfPage) 
      Console.WriteLine("End of data transfer."); 
 
   if (e.Image != null) 
   { 
      // You can load the image here. 
   } 
 
   e.Cancel = false; 
}

Requirements

Target Platforms

Reference

Leadtools.Wia Namespace

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Help Version 23.0.2024.2.29

Leadtools.Wia Assembly

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