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ReadBarcodes Method

Summary

Reads the barcodes found on this page.

Syntax
C#
VB
C++
Java
Public Function ReadBarcodes( 
   ByVal bounds As LeadRectD, 
   ByVal maximumBarcodes As Integer, 
   ByVal symbologies() As BarcodeSymbology 
) As BarcodeData() 
public:  
   array<BarcodeData^>^ ReadBarcodes( 
      LeadRectD^ bounds, 
      int maximumBarcodes, 
      array<BarcodeSymbology^>^ symbologies 
   ) 
public BarcodeData[] readBarcodes(LeadRectD bounds, int maximumBarcodes, BarcodeSymbology[] symbologies) 

Parameters

bounds

Search area in page coordinates. If this value is Empty, then the entire page is searched for barcodes.

maximumBarcodes

Maximum number of barcodes to read. Use -1 to read all barcodes found.

symbologies

Barcode symbologies to search for. If this value is null or an empty array, then all barcode symbologies are searched for.

Return Value

Array containing the data for each barcode found. An empty array is returned if no barcodes are found on the page.

Remarks

Refer to BarcodeEngine, BarcodeReader and BarcodeReader.ReadBarcodes for more information on reading barcodes using LEADTOOLS.

This method uses the engine set in DocumentBarcodes.BarcodeEngine. If this value is null then no barcodes are read and this method returns an empty array.

This method calls GetImage and then BarcodeReader.ReadBarcodes to read the barcodes.

Since the search area and options used can differ greatly from one call to the another, the document never saves the barcodes found in the cache. Each call to ReadBarcodes re-reads all the barcodes from the page image.

Example

For an example, refer to DocumentBarcodes.

Requirements
Target Platforms
Help Version 21.0.2021.3.2
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