How to split PDF from URL asynchronously for PDF splitting API in C# and PDF.co Web API

Learn how to split PDF from URL asynchronously to have PDF splitting API in C#

On this page you will learn from code samples for programming in C#. PDF.co Web API helps with PDF splitting API in C#. PDF.co Web API is the flexible Web API that includes full set of functions from e-signature requests to data extraction, OCR, images recognition, pdf splitting and pdf splitting. Can also generate barcodes and read barcodes from images, scans and pdf.

You will save a lot of time on writing and testing code as you may just take the code below and use it in your application. Sample code in C# is all you need. Copy-paste it to your the code editor, then add a reference to PDF.co Web API and you are ready to try it! Further enhancement of the code will make it more vigorous.

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Program.cs
      
using System; using System.IO; using System.Net; using Newtonsoft.Json.Linq; using System.Threading; // Cloud API asynchronous "Split PDF" job example. // Allows to avoid timeout errors when processing huge or scanned PDF documents. namespace ByteScoutWebApiExample { class Program { // The authentication key (API Key). // Get your own by registering at https://app.pdf.co/documentation/api const String API_KEY = "***********************************"; // Source PDF file to split const string SourceFileUrl = @"https://bytescout-com.s3.amazonaws.com/files/demo-files/cloud-api/pdf-split/sample.pdf"; // Comma-separated list of page numbers (or ranges) to process. Example: '1,3-5,7-'. const string Pages = "1-2,3-"; // (!) Make asynchronous job const bool Async = true; static void Main(string[] args) { // Create standard .NET web client instance WebClient webClient = new WebClient(); // Set API Key webClient.Headers.Add("x-api-key", API_KEY); try { // Prepare URL for `Split PDF` API call string query = Uri.EscapeUriString(string.Format( "https://api.pdf.co/v1/pdf/split?pages={0}&url={1}&async={2}", Pages, SourceFileUrl, Async)); // Execute request string response = webClient.DownloadString(query); // Parse JSON response JObject json = JObject.Parse(response); if (json["error"].ToObject<bool>() == false) { // Asynchronous job ID string jobId = json["jobId"].ToString(); // URL of generated JSON file available after the job completion; it will contain URLs of result PDF files. string resultJsonFileUrl = json["url"].ToString(); // Check the job status in a loop. // If you don't want to pause the main thread you can rework the code // to use a separate thread for the status checking and completion. do { string status = CheckJobStatus(jobId); // Possible statuses: "working", "failed", "aborted", "success". // Display timestamp and status (for demo purposes) Console.WriteLine(DateTime.Now.ToLongTimeString() + ": " + status); if (status == "success") { // Download JSON file as string string jsonFileString = webClient.DownloadString(resultJsonFileUrl); JArray resultFilesUrls = JArray.Parse(jsonFileString); // Download generated PDF files int part = 1; foreach (JToken token in resultFilesUrls) { string resultFileUrl = token.ToString(); string localFileName = String.Format(@".\part{0}.pdf", part); webClient.DownloadFile(resultFileUrl, localFileName); Console.WriteLine("Downloaded \"{0}\".", localFileName); part++; } break; } else if (status == "working") { // Pause for a few seconds Thread.Sleep(3000); } else { Console.WriteLine(status); break; } } while (true); } else { Console.WriteLine(json["message"].ToString()); } } catch (WebException e) { Console.WriteLine(e.ToString()); } webClient.Dispose(); Console.WriteLine(); Console.WriteLine("Press any key..."); Console.ReadKey(); } static string CheckJobStatus(string jobId) { using (WebClient webClient = new WebClient()) { // Set API Key webClient.Headers.Add("x-api-key", API_KEY); string url = "https://api.pdf.co/v1/job/check?jobid=" + jobId; string response = webClient.DownloadString(url); JObject json = JObject.Parse(response); return Convert.ToString(json["status"]); } } } }

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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>

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