How to PDF make searchable API in VB.NET using PDF.co Web API

The tutorial below will demonstrate how to PDF make searchable API in VB.NET

The sample shows steps and algorithm of how to PDF make searchable API and how to make it work in your VB.NET application. PDF.co Web API is the flexible Web API that includes full set of functions from e-signature requests to data extraction, OCR, images recognition, pdf splitting and pdf splitting. Can also generate barcodes and read barcodes from images, scans and pdf. It can be used to PDF make searchable API using VB.NET.

The SDK samples like this one below explain how to quickly make your application do PDF make searchable API in VB.NET with the help of PDF.co Web API. This VB.NET sample code is all you need for your app. Just copy and paste the code, add references (if needs to) and you are all set! Test VB.NET sample code examples whether they respond your needs and requirements for the project.

Free trial version of PDF.co Web API is available on our website. Documentation and source code samples are included.

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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-make-searchable/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 = "" ' OCR language. "eng", "fra", "deu", "spa" supported currently. Let us know if you need more. const Language as String = "eng" ' Destination PDF file name const DestinationFile as string = ".\result.pdf" 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 `Make Searchable PDF` API call Dim query As String = Uri.EscapeUriString(String.Format( "https://api.pdf.co/v1/pdf/makesearchable?name={0}&password={1}&pages={2}&lang={3}&url={4}", Path.GetFileName(DestinationFile), Password, Pages, Language, SourceFileUrl)) 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 PDF file Dim resultFileUrl As String = json("url").ToString() ' Download PDF file webClient.DownloadFile(resultFileUrl, DestinationFile) Console.WriteLine("Generated PDF 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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