PDF.co Web API - Barcode Generator API - VB.NET - QR Code With Redundancy Setting

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PDF-co-Web-API-VB-NET-QR-Code-With-Redundancy-Setting.pdf

barcode generator API in VB.NET with PDF.co Web API

PDF.co Web API: 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.

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ByteScoutWebApiExample.sln

      
Microsoft Visual Studio Solution File, Format Version 12.00
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ByteScoutWebApiExample.vbproj

      <?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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    <ProjectGuid>{9B91124C-66C3-4BD9-B29E-168C1ABB15AC}</ProjectGuid>
    <OutputType>Exe</OutputType>
    <StartupObject>ByteScoutWebApiExample.Module1</StartupObject>
    <RootNamespace>ByteScoutWebApiExample</RootNamespace>
    <AssemblyName>ByteScoutWebApiExample</AssemblyName>
    <FileAlignment>512</FileAlignment>
    <MyType>Console</MyType>
    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
  </PropertyGroup>
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    <DocumentationFile>ByteScoutWebApiExample.xml</DocumentationFile>
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    <Import Include="System.Linq" />
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Module1.vb

      Imports System.IO
Imports System.Net
Imports Newtonsoft.Json
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://apidocs.pdf.co/#barcode-generator
	Const BarcodeType As String = "QRCode"
	' Barcode value
	Const BarcodeValue As String = "QR123456
PDF.co – API for PDF, HTML to PDF, Barcodes and Data Extraction. HTML to PDF, Document Parser, Split PDF, Merge PDF, Convert PDF, Extract PDF online, via API, Zapier, Integromat or others

https://bytescout.com"

	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)

        ' Set JSON content type
        webClient.Headers.Add("Content-Type", "application/json")

		' Prepare URL for `Barcode Generator` API call
		Dim url As String = "https://api.pdf.co/v1/barcode/generate"


		' Valid error correction levels:
		' ----------------------------------
		' Low -[default] Lowest error correction level. (Approx. 7% of codewords can be restored).
		' Medium -Medium error correction level. (Approx. 15% of codewords can be restored).
		' Quarter -Quarter error correction level (Approx. 25% of codewords can be restored).
		' High -Highest error correction level (Approx. 30% of codewords can be restored).

		' Set "Custom Profiles" parameter
		Dim Profiles As String = "{ ""profiles"": [ { ""profile1"": { ""Options.QRErrorCorrectionLevel"": ""Quarter"" } } ] }"


		' Prepare requests params as JSON
		' See documentation: https : //apidocs.pdf.co
		Dim parameters As New Dictionary(Of String, Object)
		parameters.Add("name", Path.GetFileName(ResultFileName))
		parameters.Add("type", BarcodeType)
		parameters.Add("value", BarcodeValue)
		parameters.Add("profiles", Profiles)

		' Convert dictionary of params to JSON
		Dim jsonPayload As String = JsonConvert.SerializeObject(parameters)

		Try
			' Execute POST request with JSON payload
			Dim response As String = webClient.UploadString(url, jsonPayload)

			' 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

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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printable version:
PDF-co-Web-API-VB-NET-QR-Code-With-Redundancy-Setting.pdf