ByteScout Cloud API Server - PDF To Image API - C# - Convert PDF To JPEG From URL Asynchronously - ByteScout

ByteScout Cloud API Server – PDF To Image API – C# – Convert PDF To JPEG From URL Asynchronously

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How to convert PDF to JPEG from URL asynchronously for PDF to image API in C# with ByteScout Cloud API Server

Step By Step Instructions on how to convert PDF to JPEG from URL asynchronously for PDF to image API in C#

This page displays the code samples for programming in C#. ByteScout Cloud API Server was designed to assist PDF to image API in C#. ByteScout Cloud API Server is the ready to use Web API Server that can be deployed in less than 30 minutes into your own in-house server or into private cloud server. Can store data on in-house local server based storage or in Amazon AWS S3 bucket. Processing data solely on the server using buil-in ByteScout powered engine, no cloud services are used to process your data!.

Want to learn quickly? These fast application programming interfaces of ByteScout Cloud API Server for C# plus the instruction and the code below will help to learn how to convert PDF to JPEG from URL asynchronously. For implementation of this functionality, please copy and paste the code below into your app using code editor. Then compile and run your app. You can use these C# sample examples in one or many applications.

Our website provides free trial version of ByteScout Cloud API Server that gives source code samples to assist with your C# project.

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Program.cs
      
using System; using System.IO; using System.Net; using Newtonsoft.Json.Linq; using System.Threading; // 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. // Cloud API asynchronous "PDF To JPEG" job example. // Allows to avoid timeout errors when processing huge or scanned PDF documents. namespace ByteScoutWebApiExample { class Program { // Source PDF file const string SourceFileUrl = @"https://bytescout-com.s3.amazonaws.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 string Pages = ""; // PDF document password. Leave empty for unprotected documents. const string Password = ""; // (!) Make asynchronous job const bool Async = true; static void Main(string[] args) { // Create standard .NET web client instance WebClient webClient = new WebClient(); try { // Prepare URL for `PDF To JPEG` API call string query = Uri.EscapeUriString(string.Format( "https://localhost/pdf/convert/to/jpg?password={0}&pages={1}&url={2}&async={3}", Password, 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 JPEG 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 JPEG files int page = 1; foreach (JToken token in resultFilesUrls) { string resultFileUrl = token.ToString(); string localFileName = String.Format(@".\page{0}.jpg", page); webClient.DownloadFile(resultFileUrl, localFileName); Console.WriteLine("Downloaded \"{0}\".", localFileName); page++; } 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()) { string url = "https://localhost/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>

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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