Link Search Menu Expand Document

Index PDF Documents In Folder - VB.NET

PDF Extractor SDK sample in VB.NET demonstrating ‘Index PDF Documents In Folder’

Program.vb
Imports System.IO
Imports Bytescout.PDFExtractor

Module Program

    Sub Main()

        Try
            ' Output file list
            Dim lstAllFilesInfo = New List(Of FileIndexOutput)()

            ' Get all files inside directory
            Dim allFiles = Directory.GetFiles(".\Files", "*.*")

            ' Iterate all files, and get details
            For Each itmFile In allFiles
                ' Get basic file information
                Dim fileInfo As FileInfo = New FileInfo(itmFile)

                ' Check whether file is supported
                If _IsFileSupported(fileInfo) Then
                    ' Fill file index model
                    Dim oFileIndex = New FileIndexOutput()
                    oFileIndex.fileName = fileInfo.Name
                    oFileIndex.fileDate = fileInfo.CreationTime
                    oFileIndex.content = _GetFileContent(fileInfo)

                    ' Add to final list
                    lstAllFilesInfo.Add(oFileIndex)
                End If
            Next

            ' Print all output
            Console.WriteLine("Total {0} files indexed" & vbLf, lstAllFilesInfo.Count)

            For Each itmFileInfo In lstAllFilesInfo
                Console.WriteLine("fileName: {0}", itmFileInfo.fileName)
                Console.WriteLine("fileDate: {0}", itmFileInfo.fileDate.ToString("MMM dd yyyy hh:mm:ss"))
                Console.WriteLine("content: {0}", itmFileInfo.content.Trim())
                Console.WriteLine(vbLf)
            Next

        Catch ex As Exception
            Console.WriteLine(("ERROR:" + ex.Message))
        End Try

        Console.WriteLine("Press any key to exit...")
        Console.ReadLine()
    End Sub

    ''' <summary>
    ''' Get File COntent
    ''' </summary>
    Private Function _GetFileContent(ByVal fileInfo As FileInfo) As String

        Dim fileExtension As String = System.IO.Path.GetExtension(fileInfo.FullName)

        If fileExtension = ".pdf" Then
            Return _GetPdfFileContent(fileInfo)
        ElseIf fileExtension = ".png" OrElse fileExtension = ".jpg" Then
            Return _GetImageContet(fileInfo)
        End If

        Throw New Exception("File not supported.")
    End Function

    ''' <summary>
    ''' Get PDF File Content
    ''' </summary>
    Private Function _GetPdfFileContent(ByVal fileInfo As FileInfo) As String

        ' Read all file content...
        Using textExtractor As TextExtractor = New TextExtractor("demo", "demo")

            ' Load Document
            textExtractor.LoadDocumentFromFile(fileInfo.FullName)

            Return textExtractor.GetText()

        End Using

    End Function

    ''' <summary>
    ''' Get Image Contents
    ''' </summary>
    Private Function _GetImageContet(ByVal fileInfo As FileInfo) As String

        ' Read all file content...
        Using extractor As TextExtractor = New TextExtractor()
            ' Load document
            extractor.LoadDocumentFromFile(fileInfo.FullName)

            ' 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_best\"

            ' 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
            Return extractor.GetText()
        End Using
    End Function

    ''' <summary>
    ''' Check whether file is valid
    ''' </summary>
    Private Function _IsFileSupported(ByVal fileInfo As FileInfo) As Boolean
        ' Get File Extension
        Dim fileExtension As String = Path.GetExtension(fileInfo.Name)

        ' Check whether file extension is valid
        Return (fileExtension = ".pdf" OrElse fileExtension = ".png" OrElse fileExtension = ".jpg")
    End Function

    ''' <summary>
    ''' FileIndexOutput class
    ''' </summary>
    Public Class FileIndexOutput
        Public Property fileName As String
        Public Property fileDate As DateTime
        Public Property content As String
    End Class

End Module

Download Source Code (.zip)

Return to the previous page Explore PDF Extractor SDK