ByteScout Cloud API Server – HTML To PDF API – VB.NET – Generate PDF Invoice From HTML Template

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Module1.vb

      
Imports System.IO
Imports System.Net
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

 	' HTML template
	Dim template As String = File.ReadAllText(".\invoice_template.html")
	' Data to fill the template
	Dim templateData As String = File.ReadAllText(".\invoice_data.json")
	' Destination PDF file name
	Const DestinationFile As String = ".\result.pdf"

	Sub Main()

		' Create standard .NET web client instance
		Dim webClient As WebClient = New WebClient()

		Try
			' Prepare URL for HTML to PDF API call
			Dim request As String = Uri.EscapeUriString(String.Format(
				"https://localhost/pdf/convert/from/html?name={0}",
				Path.GetFileName(DestinationFile)))

			' Prepare request body in JSON format
			Dim jsonObject As JObject = New JObject(
				New JProperty("html", template),
				New JProperty("templateData", templateData))

			webClient.Headers.Add("Content-Type", "application/json")

			' Execute request
			Dim response As String = webClient.UploadString(request, jsonObject.ToString())

			' 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()

				webClient.Headers.Remove("Content-Type") ' remove the header required for only the previous request

				' Download the PDF file
				webClient.DownloadFile(resultFileUrl, DestinationFile)

				Console.WriteLine("Generated PDF document saved as ""{0}"" file.", DestinationFile)

			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>
    

ON-PREMISE OFFLINE SDK

60 Day Free Trial or Visit ByteScout Cloud API Server Home Page

Explore ByteScout Cloud API Server Documentation

Explore Samples

Sign Up for ByteScout Cloud API Server Online Training

ON-DEMAND REST WEB API

Get Your API Key

Explore Web API Docs

Explore Web API Samples

ON-PREMISE OFFLINE SDK

60 Day Free Trial or Visit ByteScout Cloud API Server Home Page

Explore ByteScout Cloud API Server Documentation

Explore Samples

Sign Up for ByteScout Cloud API Server Online Training

ON-DEMAND REST WEB API

Get Your API Key

Explore Web API Docs

Explore Web API Samples