ByteScout Cloud API Server – Barcode Generator API – VB.NET – QR Code With Redundancy Setting

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ByteScoutWebApiExample.sln

      

Microsoft Visual Studio Solution File, Format Version 12.00
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VisualStudioVersion = 15.0.26730.10
MinimumVisualStudioVersion = 10.0.40219.1
Project("{F184B08F-C81C-45F6-A57F-5ABD9991F28F}") = "ByteScoutWebApiExample", "ByteScoutWebApiExample.vbproj", "{9B91124C-66C3-4BD9-B29E-168C1ABB15AC}"
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Global
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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">
  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
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    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <ProjectGuid>{9B91124C-66C3-4BD9-B29E-168C1ABB15AC}</ProjectGuid>
    <OutputType>Exe</OutputType>
    <StartupObject>ByteScoutWebApiExample.Module1</StartupObject>
    <RootNamespace>ByteScoutWebApiExample</RootNamespace>
    <AssemblyName>ByteScoutWebApiExample</AssemblyName>
    <FileAlignment>512</FileAlignment>
    <MyType>Console</MyType>
    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
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    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <DefineDebug>true</DefineDebug>
    <DefineTrace>true</DefineTrace>
    <OutputPath>bin\Debug\</OutputPath>
    <DocumentationFile>ByteScoutWebApiExample.xml</DocumentationFile>
    <NoWarn>42016,41999,42017,42018,42019,42032,42036,42020,42021,42022</NoWarn>
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  <ItemGroup>
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    <Import Include="System.Linq" />
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    <Compile Include="My Project\AssemblyInfo.vb" />
    <Compile Include="My Project\Application.Designer.vb">
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Module1.vb

      
Imports System.IO
Imports System.Net
Imports Newtonsoft.Json
Imports Newtonsoft.Json.Linq

' Please NOTE: In this sample we're assuming Cloud Api Server is hosted at "https://localhost". 
' If it's not then please replace this with with your hosting url.
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
https://pdf.co
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://localhost/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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