Cloud API – PDF To Image – VB.NET – Convert PDF To JPEG From URL

  • Home
  • /
  • Articles
  • /
  • Cloud API – PDF To Image – VB.NET – Convert PDF To JPEG From URL

Cloud API – PDF To Image – VB.NET – Convert PDF To JPEG From URL

Module1.vb

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

Module Module1

	' (!) If you are getting '(403) Forbidden' error please ensure you have set the correct API_KEY

	' The authentication key (API Key).
	' Get your own by registering at https://secure.bytescout.com/users/sign_up
	Const API_KEY As String = "***********************************"

	' Source PDF file
	Const SourceFileUrl As String = "https://s3-us-west-2.amazonaws.com/bytescout-com/files/demo-files/cloud-api/pdf-to-image/sample.pdf"
	' Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'.
	const Pages as String = ""
	' PDF document password. Leave empty for unprotected documents.
	const Password as String = ""
	
	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 `PDF To JPEG` API call
		Dim query As String = Uri.EscapeUriString(String.Format(
			"https://bytescout.io/v1/pdf/convert/to/jpg?password={0}&pages={1}&url={2}",
			Password,
			Pages,
			SourceFileUrl))

		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

				' Download generated JPEG files
				Dim page As Integer = 1
				For Each token As JToken In json("urls")
					
					Dim resultFileUrl As string = token.ToString()
					Dim localFileName As String = String.Format(".\page{0}.jpg", page)

					webClient.DownloadFile(resultFileUrl, localFileName)

					Console.WriteLine("Downloaded ""{0}"".", localFileName)
					page = page + 1

				Next

			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

prev
next