VintaSoft Barcode .NET SDK v10.0
PdfImageViewer Class
Members  Example 




Vintasoft.Barcode Namespace : PdfImageViewer Class
Class that allows to retrieve image resources from the PDF document.
Object Model
PdfImageViewer Class
Syntax
'Declaration
 
<LicenseProviderAttribute(Vintasoft.Barcode.VintasoftLicenseProvider)>
Public NotInheritable Class PdfImageViewer 
'Usage
 
Dim instance As PdfImageViewer
[LicenseProvider(Vintasoft.Barcode.VintasoftLicenseProvider)]
public sealed class PdfImageViewer 
[LicenseProvider(Vintasoft.Barcode.VintasoftLicenseProvider)]
public __gc __sealed class PdfImageViewer 
[LicenseProvider(Vintasoft.Barcode.VintasoftLicenseProvider)]
public ref class PdfImageViewer sealed 
Remarks
Supported compressions:
Supported color spaces:
Example
Imports System.Drawing   
   
Imports Vintasoft.Barcode   
   
''' <summary>   
''' Test that shows how to read barcodes from image-resources of PDF document.   
''' </summary>   
Class PdfImageViewerExample   
	''' <summary>   
	''' Reads barcodes from image-resources of PDF document.   
	''' </summary>   
	Public Shared Sub ReadBarcodesFromPdfDocument(filename As String, barcodeTypes As BarcodeType)   
		' open PDF document   
		Using pdfImageViewer As New PdfImageViewer(filename)   
			' create the barcode reader   
			Using reader As New BarcodeReader()   
				' specify that reader must search barcodes of specified type(s)   
				reader.Settings.ScanBarcodeTypes = barcodeTypes   
   
				' for each page in PDF document   
				For i As Integer = 0 To pdfImageViewer.PageCount - 1   
					' get an array of names of image resources from page i   
					Dim imageNames As String() = pdfImageViewer.GetImageNames(i)   
					' for each image resource of page i   
					For k As Integer = 0 To imageNames.Length - 1   
						Console.WriteLine(String.Format("Page {0}, image {1}: ", i, imageNames(k)))   
						Dim imageWithBarcode As Image   
						' get image of image resource   
						Try   
							imageWithBarcode = pdfImageViewer.GetImage(i, imageNames(k))   
						Catch e As Exception   
							' not supported image format   
							Console.WriteLine(e.Message)   
                            Continue For   
						End Try   
   
						' read barcodes from image-resource   
						Dim barcodesInfo As IBarcodeInfo() = reader.ReadBarcodes(imageWithBarcode)   
   
						' dispose image   
						imageWithBarcode.Dispose()   
   
						' show barcode recognition results   
   
						If barcodesInfo.Length = 0 Then   
							Console.WriteLine("No barcodes found.")   
						Else   
							For j As Integer = 0 To barcodesInfo.Length - 1   
								Console.WriteLine(String.Format("[{0}] {1}", barcodesInfo(j).BarcodeType, barcodesInfo(j).Value))   
							Next   
						End If   
					Next   
				Next   
			End Using   
		End Using   
	End Sub   
End Class
using System;
using System.Drawing;
            
using Vintasoft.Barcode;
            
/// <summary>
/// Test that shows how to read barcodes from image-resources of PDF document.
/// </summary>
class PdfImageViewerExample
{
    /// <summary>
    /// Reads barcodes from image-resources of PDF document.
    /// </summary>
    public static void ReadBarcodesFromPdfDocument(string filename, BarcodeType barcodeTypes)
    {
        // open PDF document
        using (PdfImageViewer pdfImageViewer = new PdfImageViewer(filename))
        {
            // create the barcode reader
            using (BarcodeReader reader = new BarcodeReader())
            {
                // specify that reader must search barcodes of specified type(s)
                reader.Settings.ScanBarcodeTypes = barcodeTypes;
            
                // for each page in PDF document
                for (int i = 0; i < pdfImageViewer.PageCount; i++)
                {
                    // get an array of names of image resources from page i
                    string[] imageNames = pdfImageViewer.GetImageNames(i);
                    // for each image resource of page i
                    for (int k = 0; k < imageNames.Length; k++)
                    {
                        Console.WriteLine(string.Format("Page {0}, image {1}: ", i, imageNames[k]));
                        Image imageWithBarcode;
                        // get image of image resource
                        try
                        {
                            imageWithBarcode = pdfImageViewer.GetImage(i, imageNames[k]);
                        }
                        catch (Exception e)
                        {
                            // not supported image format
                            Console.WriteLine(e.Message);
                            continue;
                        }
            
                        // read barcodes from image-resource
                        IBarcodeInfo[] barcodesInfo = reader.ReadBarcodes(imageWithBarcode);
            
                        // dispose image
                        imageWithBarcode.Dispose();
            
                        // show barcode recognition results
            
                        if (barcodesInfo.Length == 0)
                        {
                            Console.WriteLine("No barcodes found.");
                        }
                        else
                        {
                            for (int j = 0; j < barcodesInfo.Length; j++)
                                Console.WriteLine(string.Format("[{0}] {1}",
                                    barcodesInfo[j].BarcodeType, barcodesInfo[j].Value));
                        }
                    }
                }
            }
        }
    }
}
Inheritance Hierarchy

System.Object
   Vintasoft.Barcode.PdfImageViewer

Requirements

Target Platforms: Windows 8, Windows 7, Windows Vista, Windows XP, Windows Server 2012, Windows Server 2008, Windows Server 2003

See Also

Reference

PdfImageViewer Members
Vintasoft.Barcode Namespace