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AztecBarcodeData Class

Summary

Contains the data for a single Aztec barcode.

Syntax

Java

Objective-C

C++

[TypeConverterAttribute()] 
[SerializableAttribute()] 
public class AztecBarcodeData : Leadtools.Barcode.BarcodeData, System.ICloneable

<TypeConverterAttribute()> 
<SerializableAttribute()> 
Public Class AztecBarcodeData  
   Inherits Leadtools.Barcode.BarcodeData 
   Implements System.ICloneable

@interface LTAztecBarcodeData : LTBarcodeData <NSCopying>

public class AztecBarcodeData extends BarcodeData

[TypeConverterAttribute()] 
[SerializableAttribute()] 
public ref class AztecBarcodeData : public Leadtools.Barcode.BarcodeData, System.ICloneable

Remarks

The AztecBarcodeData class derives from the base BarcodeData to add specific data that can be read or written when using Aztec barcodes.

Reading Barcodes

When the BarcodeReader object detects and reads an Aztec (BarcodeSymbology.Aztec), the BarcodeReader.ReadBarcode and BarcodeReader.ReadBarcodes methods will return the AztecBarcodeData object for each barcode cast down to the base BarcodeData class.

You can perform standard .NET casting to get the object as AztecBarcodeData and then examine the extra data properties associated with it.

Aztec read options not related to the barcode data can be set using the AztecBarcodeReadOptions class.

Writing Barcodes

The BarcodeWriter class contains the WriteBarcode method that is used to write a barcode to an image. This method accepts the data parameter as the base BarcodeData object. To write a Aztec barcode, create an instance of AztecBarcodeData and fill the required parameters, then pass this object as the data parameter to WriteBarcode.

Aztec write options not related to the barcode data can be set using the AztecBarcodeWriteOptions class.

You can use the static (or Shared in VB) BarcodeData.CreateDefaultBarcodeData method to create a new instance of AztecBarcodeData that contains default parameters ready for writing to an image:

VB Snippet

Dim AztecData As AztecBarcodeData = DirectCast(BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.Aztec), AztecBarcodeData)

C# Snippet

AztecBarcodeData AztecData = BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.Aztec) as AztecBarcodeData;

Example

This example writes a couple of Aztec barcodes with different options to an image and then reads them back.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Forms; 
using Leadtools.Barcode; 
using Leadtools.ImageProcessing; 
 
public void AztecBarcode_Example() 
{ 
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyAztecBarcodes.tif"); 
 
   BarcodeEngine engine = new BarcodeEngine(); 
 
   // Create the image to write the barcodes to 
   int resolution = 300; 
   using (RasterImage image = RasterImage.Create((int)(8.5 * resolution), (int)(11.0 * resolution), 1, resolution, RasterColor.FromKnownColor(RasterKnownColor.White))) 
   { 
      // Write two Aztec barcodes 
      WriteBarcode(engine.Writer, image, AztecBarcodeSymbolModel.AutoSize, "Aztec Data 1", 0); 
      WriteBarcode(engine.Writer, image, AztecBarcodeSymbolModel.Compact4, "Aztec Data 2", 1000); 
 
      // Save the image 
      using (RasterCodecs codecs = new RasterCodecs()) 
      { 
         codecs.Save(image, imageFileName, RasterImageFormat.CcittGroup4, 1); 
      } 
   } 
 
   // Now read the barcodes again 
   using (RasterCodecs codecs = new RasterCodecs()) 
   { 
      using (RasterImage image = codecs.Load(imageFileName)) 
      { 
         // Read all the Aztec barcodes 
         ReadBarcodes(engine.Reader, image); 
      } 
   } 
} 
 
private void WriteBarcode(BarcodeWriter writer, RasterImage image, AztecBarcodeSymbolModel symbolModel, string value, int startRow) 
{ 
   // Create the barcode data 
   AztecBarcodeData barcode = BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.Aztec) as AztecBarcodeData; 
   barcode.Value = value; 
 
   // We will use the alignment to position the barcodes, so use all of the image 
   barcode.Bounds = new LogicalRectangle(0, startRow, image.ImageWidth, image.ImageHeight, LogicalUnit.Pixel); 
 
   // Set the write options 
   AztecBarcodeWriteOptions options = new AztecBarcodeWriteOptions(); 
 
   options.AztecRune = false; 
   options.ErrorCorrectionRate = 23; 
   options.XModule = 30; 
   options.QuietZone = 10; 
   options.SymbolModel = symbolModel; 
 
   // Write it 
   Console.WriteLine("Writing barcode with symbol model: {0} and Data: {1}", symbolModel, value); 
   writer.WriteBarcode(image, barcode, options); 
} 
 
private void ReadBarcodes(BarcodeReader reader, RasterImage image) 
{ 
   // Setup read options 
   AztecBarcodeReadOptions options = new AztecBarcodeReadOptions(); 
 
   Console.WriteLine("Reading Aztec barcodes"); 
   BarcodeData[] barcodes = reader.ReadBarcodes(image, LogicalRectangle.Empty, 0, new BarcodeSymbology[] { BarcodeSymbology.Aztec }, new BarcodeReadOptions[] { options }); 
   Console.WriteLine("{0} barcodes found:", barcodes.Length); 
   foreach (AztecBarcodeData barcode in barcodes) 
   { 
      Console.WriteLine(" At {0}, and data: {1}", barcode.Bounds, barcode.Value); 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.Forms 
Imports Leadtools.Barcode 
Imports Leadtools.ImageProcessing 
 
Public Sub AztecBarcode_Example() 
   Dim imageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "MyAztecBarcodes.tif") 
 
   Dim engine As New BarcodeEngine() 
 
   ' Create the image to write the barcodes to 
   Dim resolution As Integer = 300 
   Using image As RasterImage = RasterImage.Create(CType(8.5 * resolution, Integer), CType(11.0 * resolution, Integer), 1, resolution, RasterColor.FromKnownColor(RasterKnownColor.White)) 
      ' Write two Aztec barcodes 
      WriteBarcode(engine.Writer, image, AztecBarcodeSymbolModel.AutoSize, "Aztec Data 1", False) 
      WriteBarcode(engine.Writer, image, AztecBarcodeSymbolModel.Compact4, "Aztec Data 2", True) 
 
      ' Save the image 
      Using codecs As New RasterCodecs() 
         codecs.Save(image, imageFileName, RasterImageFormat.CcittGroup4, 1) 
      End Using 
   End Using 
 
   ' Now read the barcodes again 
   Using codecs As New RasterCodecs() 
      Using image As RasterImage = codecs.Load(imageFileName) 
         ' Read all the Aztec barcodes 
         ReadBarcodes(engine.Reader, image) 
      End Using 
   End Using 
End Sub 
 
Private Sub WriteBarcode(ByVal writer As BarcodeWriter, ByVal image As RasterImage, ByVal symbolModel As AztecBarcodeSymbolModel, ByVal value As String, ByVal topLeft As Boolean) 
   ' Create the barcode data 
   Dim barcode As AztecBarcodeData = DirectCast(BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.Aztec), AztecBarcodeData) 
   barcode.Value = value 
 
   ' We will use the alignment to position the barcodes, so use all of the image 
   barcode.Bounds = New LogicalRectangle(0, 0, image.ImageWidth, image.ImageHeight, LogicalUnit.Pixel) 
 
   ' Set the write options 
   Dim options As New AztecBarcodeWriteOptions() 
 
   options.AztecRune = False 
   options.ErrorCorrectionRate = 23 
   options.XModule = 30 
   options.QuietZone = 10 
   options.SymbolModel = symbolModel 
 
   ' Write it 
   Console.WriteLine("Writing barcode with symbol model: {0} and Data: {1}", symbolModel, value) 
   writer.WriteBarcode(image, barcode, options) 
End Sub 
 
Private Sub ReadBarcodes(ByVal reader As BarcodeReader, ByVal image As RasterImage) 
   ' Setup read options 
   Dim options As New AztecBarcodeReadOptions() 
 
   Console.WriteLine("Reading Aztec barcodes") 
   Dim barcodes() As BarcodeData = reader.ReadBarcodes(image, LogicalRectangle.Empty, 0, New BarcodeSymbology() {BarcodeSymbology.Aztec}, New BarcodeReadOptions() {options}) 
   Console.WriteLine("{0} barcodes found:", barcodes.Length) 
   For Each barcode As AztecBarcodeData In barcodes 
      Console.WriteLine(" At {0}, and data: {1}", barcode.Bounds, barcode.Value) 
   Next 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class