ByteScout PDF Extractor SDK – VB.NET – TextExtractor Progress Indication

Home
/
Articles
/
ByteScout PDF Extractor SDK – VB.NET – TextExtractor Progress Indication

printable version:
ByteScout-PDF-Extractor-SDK-VB-NET-TextExtractor-Progress-Indication.pdf

textextractor progress indication in VB.NET and ByteScout PDF Extractor SDK

Tutorial: how to do textextractor progress indication in VB.NET

Today you are going to learn how to textextractor progress indication in VB.NET. Textextractor progress indication in VB.NET can be implemented with ByteScout PDF Extractor SDK. ByteScout PDF Extractor SDK is the SDK that helps developers to extract data from unstructured documents, pdf, images, scanned and electronic forms. Includes AI functions like automatic table detection, automatic table extraction and restructuring, text recognition and text restoration from pdf and scanned documents. Includes PDF to CSV, PDF to XML, PDF to JSON, PDF to searchable PDF functions as well as methods for low level data extraction.

Fast application programming interfaces of ByteScout PDF Extractor SDK for VB.NET plus the instruction and the VB.NET code below will help you quickly learn textextractor progress indication. This VB.NET sample code should be copied and pasted into your application’s code editor. Then just compile and run it to see how it works. You can use these VB.NET sample examples in one or many applications.

Trial version can be obtained from our website for free. It includes this and other source code samples for VB.NET.

On-demand (REST Web API) version:
Web API (on-demand version)

On-premise offline SDK for Windows:
60 Day Free Trial (on-premise)

Program.vb

      Imports Bytescout.PDFExtractor

Module Program

    Sub Main()

        Try
            ' Read all file content...
            Using extractor As TextExtractor = New TextExtractor()
                ' Load document
                extractor.LoadDocumentFromFile("sample.png")

                ' Extractor Progress event
                Console.WriteLine("Text Extraction in progress: " & vbLf)
                AddHandler extractor.ProgressChanged, AddressOf Extractor_ProgressChanged

                ' Set option to repair text
                extractor.OCRMode = OCRMode.TextFromImagesAndVectorsAndRepairedFonts

                ' Enable Optical Character Recognition (OCR)
                ' in .Auto mode (SDK automatically checks if needs to use OCR or not)
                extractor.OCRMode = OCRMode.Auto

                ' Set the location of OCR language data files
                extractor.OCRLanguageDataFolder = "c:\Program Files\Bytescout PDF Extractor SDK\ocrdata\"

                ' Set OCR language
                extractor.OCRLanguage = "eng" ' "eng" for english, "deu" for German, "fra" for French, "spa" for Spanish etc - according to files in "ocrdata" folder
                ' Find more language files at https://github.com/bytescout/ocrdata

                ' Set PDF document rendering resolution
                extractor.OCRResolution = 300

                ' Read all text
                Dim allExtractedText = extractor.GetText()
                Console.WriteLine(vbLf & vbLf & "Extracted Text:" & vbLf & vbLf & "{0}", allExtractedText)
            End Using

        Catch ex As Exception
            Console.WriteLine(ex.Message)
        End Try

        Console.WriteLine("Press enter key to exit...")
        Console.ReadLine()

    End Sub


    ''' <summary>
    ''' Handle progress change event
    ''' </summary>
    Private Sub Extractor_ProgressChanged(ByVal sender As Object, ByVal ongoingOperation As OngoingOperation, ByVal progress As Double, ByRef cancel As Boolean)
        drawTextProgressBar(Convert.ToInt32(progress), 100)
    End Sub

    ''' <summary>
    ''' Display progress bar
    ''' </summary>
    Private Sub drawTextProgressBar(ByVal progress As Integer, ByVal total As Integer)
        'draw empty progress bar
        Console.CursorLeft = 0
        Console.Write("[") ' start
        Console.CursorLeft = 32
        Console.Write("]") ' end
        Console.CursorLeft = 1
        Dim onechunk As Single = 30.0F / total
        Dim position As Integer = 1

        ' draw filled part
        For i As Integer = 0 To onechunk * progress - 1
            Console.BackgroundColor = ConsoleColor.Green
            Console.CursorLeft = Math.Min(System.Threading.Interlocked.Increment(position), position - 1)
            Console.Write(" ")
        Next

        ' draw unfilled part
        For i As Integer = position To 31
            Console.BackgroundColor = ConsoleColor.Gray
            Console.CursorLeft = Math.Min(System.Threading.Interlocked.Increment(position), position - 1)
            Console.Write(" ")
        Next

        ' draw totals
        Console.CursorLeft = 35
        Console.BackgroundColor = ConsoleColor.Black
        Console.Write(progress.ToString() & " of " & total.ToString() & "    ") ' blanks at the end remove any excess
    End Sub

End Module