ByteScout Cloud API Server - PDF Merging API - VB.NET - Merge PDF Documents From Uploaded Files - ByteScout

ByteScout Cloud API Server – PDF Merging API – VB.NET – Merge PDF Documents From Uploaded Files

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How to merge PDF documents from uploaded files for PDF merging API in VB.NET and ByteScout Cloud API Server

Step-by-step tutorial:How to merge PDF documents from uploaded files to have PDF merging API in VB.NET

We regularly create and update our sample code library so you may quickly learn PDF merging API and the step-by-step process in VB.NET. ByteScout Cloud API Server was designed to assist PDF merging API in VB.NET. ByteScout Cloud API Server is API server that is ready to use and can be installed and deployed in less than 30 minutes on your own Windows server or server in a cloud. It can save data and files on your local server-based file storage or in Amazon AWS S3 storage. Data is processed solely on the API server and is powered by ByteScout engine, no cloud services or Internet connection is required for data processing..

Want to learn quickly? These fast application programming interfaces of ByteScout Cloud API Server for VB.NET plus the instruction and the code below will help to learn how to merge PDF documents from uploaded files. Open your VB.NET project and simply copy & paste the code and then run your app! Use of ByteScout Cloud API Server in VB.NET is also described in the documentation given along with the product.

ByteScout Cloud API Server – free trial version is available on our website. Also, there are other code samples to help you with your VB.NET application included into trial version.

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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 ' Source PDF files Dim SourceFiles as String() = { ".\sample1.pdf", ".\sample2.pdf" } ' Destination PDF file name const DestinationFile as string = ".\result.pdf" Sub Main() ' Create standard .NET web client instance Dim webClient As WebClient = New WebClient() ' 1. UPLOAD FILES TO CLOUD Dim uploadedFiles As List(Of String) = New List(Of String)() Try For Each pdfFile As String In SourceFiles ' 1a. RETRIEVE THE PRESIGNED URL TO UPLOAD THE FILE. ' Prepare URL for `Get Presigned URL` API call Dim query As string = Uri.EscapeUriString(string.Format( "https://localhost/file/upload/get-presigned-url?contenttype=application/octet-stream&name={0}", Path.GetFileName(pdfFile))) ' 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 ' Get URL to use for the file upload Dim uploadUrl As string = json("presignedUrl").ToString() ' Get URL of uploaded file to use with later API calls Dim uploadedFileUrl As string = json("url").ToString() ' 1b. UPLOAD THE FILE TO CLOUD. webClient.Headers.Add("content-type", "application/octet-stream") webClient.UploadFile(uploadUrl, "PUT", pdfFile) ' You can use UploadData() instead if your file is byte array or Stream uploadedFiles.Add(uploadedFileUrl) Else Console.WriteLine(json("message").ToString()) End If Next if uploadedFiles.Count > 0 Then ' 2. MERGE UPLOADED PDF DOCUMENTS ' Prepare URL for `Merge PDF` API call Dim query As String = Uri.EscapeUriString(String.Format( "https://localhost/pdf/merge?name={0}&url={1}", Path.GetFileName(DestinationFile), string.Join(",", uploadedFiles))) ' 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 ' Get URL of generated PDF file Dim resultFileUrl As string = json("url").ToString() ' Download PDF file webClient.DownloadFile(resultFileUrl, DestinationFile) Console.WriteLine("Generated PDF file saved as ""{0}"" file.", DestinationFile) Else Console.WriteLine(json("message").ToString()) End If 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

VIDEO

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

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