PDF to text API in VB.NET using PDF.co Web API

How To: tutorial on PDF to text API in VB.NET

Source code documentation samples provide quick and easy way to add a required functionality into your application. PDF.co Web API was made to help with PDF to text API in VB.NET. PDF.co Web API is the Rest API that provides set of data extraction functions, tools for documents manipulation, splitting and merging of pdf files. Includes built-in OCR, images recognition, can generate and read barcodes from images, scans and pdf.

VB.NET, code samples for VB.NET, developers help to speed up the application development and writing a code when using PDF.co Web API. In order to implement this functionality, you should copy and paste code below into your app using code editor. Then compile and run your application. This basic programming language sample code for VB.NET will do the whole work for you in implementing PDF to text API in your app.

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Module1.vb
      
Imports System.IO Imports System.Net Imports Newtonsoft.Json.Linq Module Module1 ' The authentication key (API Key). ' Get your own by registering at https://app.pdf.co/documentation/api Const API_KEY As String = "***********************************" ' Direct URL of source PDF file. Const SourceFileUrl As String = "https://bytescout-com.s3.amazonaws.com/files/demo-files/cloud-api/pdf-to-text/sample.pdf" ' Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'. const Pages as String = "" ' PDF document password. Leave empty for unprotected documents. const Password As string = "" ' Destination TXT file name const DestinationFile as string = ".\result.txt" ' Sample profile that sets advanced conversion options ' Advanced options are properties of TextExtractor class from ByteScout Text Extractor SDK used in the back-end: ' https://cdn.bytescout.com/help/BytescoutPDFExtractorSDK/html/8a2bae5a-346f-8338-b5aa-6f3522dca0d4.htm ReadOnly Profiles = File.ReadAllText("profile.json") Sub Main() ' Create standard .NET web client instance Dim webClient As WebClient = New WebClient() ' Set API Key webClient.Headers.Add("x-api-key", API_KEY) ' Prepare URL for `PDF To TXT` API call Dim query As String = Uri.EscapeUriString(String.Format( "https://api.pdf.co/v1/pdf/convert/to/text?name={0}&password={1}&pages={2}&url={3}&profiles={4}", Path.GetFileName(DestinationFile), Password, Pages, SourceFileUrl, Profiles)) Try ' Execute request Dim response As String = webClient.DownloadString(query) ' Parse JSON response Dim json As JObject = JObject.Parse(response) If json("error").ToObject(Of Boolean) = False Then ' Get URL of generated TXT file Dim resultFileUrl As String = json("url").ToString() ' Download TXT file webClient.DownloadFile(resultFileUrl, DestinationFile) Console.WriteLine("Generated TXT file saved as ""{0}"" file.", DestinationFile) Else Console.WriteLine(json("message").ToString()) End If Catch ex As WebException Console.WriteLine(ex.ToString()) End Try webClient.Dispose() Console.WriteLine() Console.WriteLine("Press any key...") Console.ReadKey() End Sub End Module

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packages.config
      
<?xml version="1.0" encoding="utf-8"?> <packages> <package id="Newtonsoft.Json" version="10.0.3" targetFramework="net40" /> </packages>

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