PDF.co Web API - HTML To PDF API - VB.NET - Generate PDF Invoice From HTML Template - ByteScout

PDF.co Web API – HTML To PDF API – VB.NET – Generate PDF Invoice From HTML Template

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PDF.co Web API – HTML To PDF API – VB.NET – Generate PDF Invoice From HTML Template

Module1.vb

[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 = “***********************************”

‘ 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()

‘ Set API Key
webClient.Headers.Add(“x-api-key”, API_KEY)

Try
‘ Prepare URL for HTML to PDF API call
Dim request As String = Uri.EscapeUriString(String.Format(
“https://api.pdf.co/v1/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

[/vb]


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