ByteScout PDF Extractor SDK – VB.NET – Read Values from Form Fields

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ByteScout PDF Extractor SDK – VB.NET – Read Values from Form Fields

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ByteScout-PDF-Extractor-SDK-VB-NET-Read-Values-from-Form-Fields.pdf

How to read values from form fields in VB.NET using ByteScout PDF Extractor SDK

Write code in VB.NET to read values from form fields with this step-by-step tutorial

The code below will help you to implement an VB.NET app to read values from form fields. ByteScout PDF Extractor SDK is the Software Development Kit (SDK) that is designed to help developers with data extraction from unstructured documents like pdf, tiff, scans, images, scanned and electronic forms. The library is powered by OCR, computer vision and AI to provide unique functionality like table detection, automatic table structure extraction, data restoration, data restructuring and reconstruction. Supports PDF, TIFF, PNG, JPG images as input and can output CSV, XML, JSON formatted data. Includes full set of utilities like pdf splitter, pdf merger, searchable pdf maker. It can be used to read values from form fields using VB.NET.

This rich sample source code in VB.NET for ByteScout PDF Extractor SDK includes the number of functions and options you should do calling the API to read values from form fields. In order to implement the functionality, you should copy and paste this code for VB.NET below into your code editor with your app, compile and run your application. This basic programming language sample code for VB.NET will do the whole work for you to read values from form fields.

Download free trial version of ByteScout PDF Extractor SDK from our website with this and other source code samples for VB.NET.

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Program.vb

      Imports System.Xml
Imports Bytescout.PDFExtractor

Module Program

    Sub Main()

        Try
            ' Create XMLExtractor interface
            Using extractor As New XMLExtractor("demo", "demo")

                ' Load Sample PDF document
                extractor.LoadDocumentFromFile("filled_form.pdf")

                ' Get PDF document text as XML
                Dim xmlText As String = extractor.GetXML

                ' Load XML
                Dim xmlDocument As XmlDocument = New XmlDocument
                xmlDocument.LoadXml(xmlText)

                ' Select all "control" nodes
                Dim formControls As XmlNodeList = xmlDocument.SelectNodes("//control")
                If (Not (formControls) Is Nothing) Then
                    For Each formControl As XmlNode In formControls

                        Dim typeAttribute As XmlAttribute = formControl.Attributes("type")

                        ' Get filled textboxes
                        If (typeAttribute.Value = "editbox") Then
                            If Not String.IsNullOrEmpty(formControl.InnerText) Then
                                Console.WriteLine(("EDITBOX " + (formControl.Attributes("id").Value + (": " + formControl.InnerText))))
                            End If

                        End If

                        ' Get checked checkboxes
                        If (typeAttribute.Value = "checkbox") Then
                            If (formControl.Attributes("state").Value = "1") Then
                                Console.WriteLine(("CHECKBOX " _
                                    + (formControl.Attributes("id").Value + (": " + formControl.Attributes("state").Value))))
                            End If
                        End If

                    Next
                End If
            End Using

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

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

    End Sub

End Module