ReadBarcode(RasterImage,LeadRect,BarcodeSymbology[]) Method

Visual Basic
C#
WinRT C#
Objective-C
Java
WinRT JavaScript
C++

public BarcodeData ReadBarcode( 
   RasterImage image,
   LeadRect searchBounds,
   BarcodeSymbology[] symbologies
)

'Declaration
 
Public Overloads Function ReadBarcode( _
   ByVal image As RasterImage, _
   ByVal searchBounds As LeadRect, _
   ByVal symbologies() As BarcodeSymbology _
) As BarcodeData

'Usage
 
Dim instance As BarcodeReader
Dim image As RasterImage
Dim searchBounds As LeadRect
Dim symbologies() As BarcodeSymbology
Dim value As BarcodeData
 
value = instance.ReadBarcode(image, searchBounds, symbologies)

public BarcodeData ReadBarcode( 
   RasterImage image,
   LeadRect searchBounds,
   BarcodeSymbology[] symbologies
)

ObjectiveC Syntax

 function Leadtools.Barcode.BarcodeReader.ReadBarcode(RasterImage,LeadRect,BarcodeSymbology[])( 
   image ,
   searchBounds ,
   symbologies 
)

public:
BarcodeData^ ReadBarcode( 
   RasterImage^ image,
   LeadRect searchBounds,
   array<BarcodeSymbology>^ symbologies
)

Parameters

image: A Leadtools.RasterImage object that contains the image data. Must not be null.
searchBounds: A Leadtools.LeadRect that specifies the region of interest area in the image where the barcode search and detection is performed. Specify empty rectangle to indicate that the search must be performed on the whole image.
symbologies: An array of BarcodeSymbology enumeration members that specifies the barcode symbologies (types) to search for.

Return Value

An instance of BarcodeData or one of its derived classes that contains the symbology, data, location and any rotation angle of the barcode found. If no barcodes can be found, then this method will return null.

Note: In LEADTOOLS for .NET, the equivalent to Leadtools.LeadRect is Leadtools.Forms.LogicalRectangle.

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

Copy Code

[TestMethod]
public async Task BarcodeReader_ReadBarcodeExample3()
{
   string imageFileName = @"Assets\Barcode1.tif";
   // Create a Barcode engine
   BarcodeEngine engine = new BarcodeEngine();

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

   using(RasterCodecs codecs = new RasterCodecs())
   {
      StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(imageFileName);
      using(RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile)))
      {
         // In the US, UPC barcodes are used to identity products. So, create an array of UPC symbologies
         BarcodeSymbology[] upcSymbologies =
         {
            BarcodeSymbology.UPCA,
            BarcodeSymbology.UPCE
         };

         // Read the first UPC barcode from the image
         BarcodeData barcode = reader.ReadBarcode(image, LeadRectHelper.Empty, upcSymbologies);

         // Show its location and data if 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");
         }
      }
   }
}

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

BarcodeReader Class
BarcodeReader Members
Overload List