LEADTOOLS Barcode (Leadtools.Barcode assembly)

GetDefaultOptions Method (BarcodeReader)

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Leadtools.Barcode Namespace > BarcodeReader Class : GetDefaultOptions Method
An BarcodeSymbology enumeration member that specifies the barcode symbology (or type) to get its options.

For information about this method please see GetDefaultOptions.

Syntax
public IBarcodeReadOptions GetDefaultOptions( 
   BarcodeSymbology symbology
)
'Declaration
 
Public Function GetDefaultOptions( _
   ByVal symbology As BarcodeSymbology _
) As IBarcodeReadOptions
'Usage
 
Dim instance As BarcodeReader
Dim symbology As BarcodeSymbology
Dim value As IBarcodeReadOptions
 
value = instance.GetDefaultOptions(symbology)
public IBarcodeReadOptions GetDefaultOptions( 
   BarcodeSymbology symbology
)

            

        

            

            

            

        

            

            
 function Leadtools.Barcode.BarcodeReader.GetDefaultOptions( 
   symbology 
)


            

        

            

            
public:
IBarcodeReadOptions^ GetDefaultOptions( 
   BarcodeSymbology symbology
) 

            

        

            

        
            
Parameters
symbology


An BarcodeSymbology enumeration member that specifies the barcode symbology (or type) to get its options.

            
            
Return Value
The BarcodeReadOptions derived object used by this BarcodeReader as the default read options to use when reading barcodes of the type specified in symbology.

            
            
            
            
Remarks
Note: In LEADTOOLS for .NET, the equivalent to IBarcodeReadOptions is BarcodeReadOptions.

            
            
            
Example

    

            
            

            Copy Code
                
            

            

    

     

            
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Forms
Imports Leadtools.Barcode
Imports Leadtools.ImageProcessing

Public Sub BarcodeReader_GetDefaultOptionsExample()
   Dim imageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Barcode1.tif")

   ' Create a Barcode engine
   Dim engine As New BarcodeEngine()

   ' Get the Barcode reader instance
   Dim reader As BarcodeReader = engine.Reader

   ' Load the image
   Using codecs As New RasterCodecs()
      Using image As RasterImage = codecs.Load(imageFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1)
         ' Rotate the image by 90, so default option of reading horizonal barcodes will not work
         Console.WriteLine("Rotating the image by 90 degrees")
         Dim rotate As New RotateCommand(90 * 100, RotateCommandFlags.Resize, RasterColor.FromKnownColor(RasterKnownColor.White))
         rotate.Run(image)

         ' Read a UPCA barcode from the image using default options
         Console.WriteLine("Reading barcodes using default options")
         Dim barcode As BarcodeData = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA)

         ' Show its location and data if found
         ' This will print out "Not found"
         If Not IsNothing(barcode) Then
            Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value)
         Else
            Console.WriteLine("Not found")
         End If

         ' Now set the default options for reading 1D barcodes to search for vertical barcodes and try again
         Dim oneDReadOptions As OneDBarcodeReadOptions = DirectCast(reader.GetDefaultOptions(BarcodeSymbology.UPCA), OneDBarcodeReadOptions)
         oneDReadOptions.SearchDirection = BarcodeSearchDirection.Vertical

         ' Read again
         Console.WriteLine("Reading barcodes using new options")
         barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA)

         ' Show its location and data if found
         ' This will find the barcode and print its information now
         If Not IsNothing(barcode) Then
            Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value)
         Else
            Console.WriteLine("Not found")
         End If
      End Using
   End Using
End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

            

   

     

            
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms;
using Leadtools.Barcode;
using Leadtools.ImageProcessing;

public void BarcodeReader_GetDefaultOptionsExample()
{
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "Barcode1.tif");

   // Create a Barcode engine
   BarcodeEngine engine = new BarcodeEngine();

   // Get the Barcode reader instance
   BarcodeReader reader = engine.Reader;

   // Load the image
   using(RasterCodecs codecs = new RasterCodecs())
   {
      using(RasterImage image = codecs.Load(imageFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1))
      {
         // Rotate the image by 90, so default option of reading horizonal barcodes will not work
         Console.WriteLine("Rotating the image by 90 degrees");
         RotateCommand rotate = new RotateCommand(90 * 100, RotateCommandFlags.Resize, RasterColor.FromKnownColor(RasterKnownColor.White));
         rotate.Run(image);

         // Read a UPCA barcode from the image using default options
         Console.WriteLine("Reading barcodes using default options");
         BarcodeData barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA);

         // Show its location and data if found
         // This will print out "Not found"
         if(barcode != null)
         {
            Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value);
         }
         else
         {
            Console.WriteLine("Not found");
         }

         // Now set the default options for reading 1D barcodes to search for vertical barcodes and try again
         OneDBarcodeReadOptions oneDReadOptions = reader.GetDefaultOptions(BarcodeSymbology.UPCA) as OneDBarcodeReadOptions;
         oneDReadOptions.SearchDirection = BarcodeSearchDirection.Vertical;

         // Read again
         Console.WriteLine("Reading barcodes using new options");
         barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA);

         // Show its location and data if found
         // This will find the barcode and print its information now
         if(barcode != null)
         {
            Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value);
         }
         else
         {
            Console.WriteLine("Not found");
         }
      }
   }
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

            

   

     

            
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Barcode;
using Leadtools.ImageProcessing;

      
public async Task BarcodeReader_GetDefaultOptionsExample()
{
   string imageFileName = @"Assets\Barcode1.tif";
   // Create a Barcode engine
   BarcodeEngine engine = new BarcodeEngine();

   // Get the Barcode reader instance
   BarcodeReader reader = engine.Reader;

   // Load the image
   using(RasterCodecs codecs = new RasterCodecs())
   {
      StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(imageFileName);
      using(RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile)))
      {
         // Rotate the image by 90, so default option of reading horizonal barcodes will not work
         Debug.WriteLine("Rotating the image by 90 degrees");
         RotateCommand rotate = new RotateCommand(90 * 100, RotateCommandFlags.Resize, RasterColorHelper.FromKnownColor(RasterKnownColor.White));
         rotate.Run(image);

         // Read a UPCA barcode from the image using default options
         Debug.WriteLine("Reading barcodes using default options");
         BarcodeData barcode = reader.ReadBarcode(image, LeadRectHelper.Empty, BarcodeSymbology.UPCA);

         // Show its location and data if found
         // This will print out "Not found"
         if(barcode != null)
         {
            Debug.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value);
         }
         else
         {
            Debug.WriteLine("Not found");
         }

         // Now set the default options for reading 1D barcodes to search for vertical barcodes and try again
         OneDBarcodeReadOptions oneDReadOptions = reader.GetDefaultOptions(BarcodeSymbology.UPCA) as OneDBarcodeReadOptions;
         oneDReadOptions.SearchDirection = BarcodeSearchDirection.Vertical;

         // Read again
         Debug.WriteLine("Reading barcodes using new options");
         barcode = reader.ReadBarcode(image, LeadRectHelper.Empty, BarcodeSymbology.UPCA);

         // Show its location and data if found
         // This will find the barcode and print its information now
         if(barcode != null)
         {
            Debug.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value);
         }
         else
         {
            Debug.WriteLine("Not found");
         }
      }
   }
}

            

   

     

            
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms;
using Leadtools.Barcode;
using Leadtools.ImageProcessing;
using Leadtools.Examples;

public void BarcodeReader_GetDefaultOptionsExample(RasterImage image)
{
   // Create a Barcode engine
   BarcodeEngine engine = new BarcodeEngine();
   // Get the Barcode reader instance
   BarcodeReader reader = engine.Reader;

   // Load the image
   RasterCodecs codecs = new RasterCodecs();

   // Rotate the image by 90, so default option of reading horizonal barcodes will not work
   Console.WriteLine("Rotating the image by 90 degrees");
   RotateCommand rotate = new RotateCommand(90 * 100, RotateCommandFlags.Resize, RasterColor.FromKnownColor(RasterKnownColor.White));
   rotate.Run(image);

   // Read a UPCA barcode from the image using default options
   Console.WriteLine("Reading barcodes using default options");
   BarcodeData barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA);

   // Show its location and data if found
   // This will print out "Not found"
   if(barcode != null)
   {
      Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value);
   }
   else
   {
      Console.WriteLine("Not found");
   }

   // Now set the default options for reading 1D barcodes to search for vertical barcodes and try again
   OneDBarcodeReadOptions oneDReadOptions = reader.GetDefaultOptions(BarcodeSymbology.UPCA) as OneDBarcodeReadOptions;
   oneDReadOptions.SearchDirection = BarcodeSearchDirection.Vertical;

   // Read again
   Console.WriteLine("Reading barcodes using new options");
   barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA);

   // Show its location and data if found
   // This will find the barcode and print its information now
   if(barcode != null)
   {
      Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value);
   }
   else
   {
      Console.WriteLine("Not found");
   }
}

            

   

     

            
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Forms
Imports Leadtools.Barcode
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Color

Public Sub BarcodeReader_GetDefaultOptionsExample(ByVal image As RasterImage)
   ' Create a Barcode engine
   Dim engine As BarcodeEngine = New BarcodeEngine()
   ' Get the Barcode reader instance
   Dim reader As BarcodeReader = engine.Reader

   ' Load the image
   Dim codecs As RasterCodecs = New RasterCodecs()

   ' Rotate the image by 90, so default option of reading horizonal barcodes will not work
   Console.WriteLine("Rotating the image by 90 degrees")
   Dim rotate As RotateCommand = New RotateCommand(90 * 100, RotateCommandFlags.Resize, RasterColor.FromKnownColor(RasterKnownColor.White))
   rotate.Run(image)

   ' Read a UPCA barcode from the image using default options
   Console.WriteLine("Reading barcodes using default options")
   Dim barcode As BarcodeData = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA)

   ' Show its location and data if found
   ' This will print out "Not found"
   If Not barcode Is Nothing Then
      Console.WriteLine("Found a {0} barcode at {1}, data:" & Constants.vbLf & "{2}", barcode.Symbology, barcode.Bounds, barcode.Value)
   Else
      Console.WriteLine("Not found")
   End If

   ' Now set the default options for reading 1D barcodes to search for vertical barcodes and try again
   Dim oneDReadOptions As OneDBarcodeReadOptions = TryCast(reader.GetDefaultOptions(BarcodeSymbology.UPCA), OneDBarcodeReadOptions)
   oneDReadOptions.SearchDirection = BarcodeSearchDirection.Vertical

   ' Read again
   Console.WriteLine("Reading barcodes using new options")
   barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA)

   ' Show its location and data if found
   ' This will find the barcode and print its information now
   If Not barcode Is Nothing Then
      Console.WriteLine("Found a {0} barcode at {1}, data:" & Constants.vbLf & "{2}", barcode.Symbology, barcode.Bounds, barcode.Value)
   Else
      Console.WriteLine("Not found")
   End If
End Sub

            

   

      
	
      
	
    

            
            
Requirements
Target Platforms

            
            
See Also
Reference
BarcodeReader Class

BarcodeReader Members




        
    

	
    

        

 
 
          

























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         Leadtools.Barcode requires a Barcode Module license and unlock key. For more information, refer to: LEADTOOLS Toolkit Features