How to generate barcode for barcode generator API in VB.NET with PDF.co Web API

See how to generate barcode to have barcode generator API in VB.NET

These source code samples are listed and grouped by their programming language and functions they use. PDF.co Web API was made to help with barcode generator API in VB.NET. PDF.co Web API is the Web API with a set of tools for documents manipulation, data conversion, data extraction, splitting and merging of documents. Includes image recognition, built-in OCR, barcode generation and barcode decoders to decode bar codes from scans, pictures and pdf.

VB.NET code snippet like this for PDF.co Web API works best when you need to quickly implement barcode generator API in your VB.NET application. For implimentation of this functionality, please copy and paste code below into your app using code editor. Then compile and run your app. You can use these VB.NET sample examples in one or many applications.

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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 = "***********************************" ' Result file name Const ResultFileName As String = ".\barcode.png" ' Barcode type. See valid barcode types in the documentation https://app.pdf.co/documentation/api/1.0/barcode/generate.html Const BarcodeType As String = "Code128" ' Barcode value Const BarcodeValue As String = "qweasd123456" 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 `Barcode Generator` API call Dim query As String = Uri.EscapeUriString(string.Format( "https://api.pdf.co/v1/barcode/generate?name={0}&type={1}&value={2}", Path.GetFileName(ResultFileName), BarcodeType, BarcodeValue)) 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 barcode image file Dim resultFileURI As string = json("url").ToString() ' Download the image file webClient.DownloadFile(resultFileURI, ResultFileName) Console.WriteLine("Generated barcode saved to ""{0}"" file.", ResultFileName) 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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