PDF.co Web API – Barcode Generator API – VB.NET – Generate Barcode

  • Home
  • /
  • Articles
  • /
  • PDF.co Web API – Barcode Generator API – VB.NET – Generate Barcode

PDF.co Web API – Barcode Generator API – VB.NET – Generate Barcode

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


  Click here to get your Free Trial version of the SDK

Tutorials:

prev
next