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Generate PDF Invoice From HTML Template - C#

PDF from HTML Template sample in C# demonstrating ‘Generate PDF Invoice From HTML Template’

using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace ByteScoutWebApiExample
	class Program
		// The authentication key (API Key).
		// Get your own by registering at
		const String API_KEY = "***********************************";

		static void Main(string[] args)
			// --TemplateID--
				Please follow below steps to create your own HTML Template and get "templateId". 
				1. Add new html template in
				2. Copy paste your html template code into this new template. Sample HTML templates can be found at ""
				3. Save this new template
				4. Copy it’s ID to clipboard
				5. Now set ID of the template into “templateId” parameter

			// HTML template using built-in template
			// see
			var templateId = 2;

			// Data to fill the template
			string templateData = File.ReadAllText(@".\invoice_data.json");
			// Destination PDF file name
			string destinationFile = @".\result.pdf";

			// Create standard .NET web client instance
			WebClient webClient = new WebClient();

			// Set API Key
			webClient.Headers.Add("x-api-key", API_KEY);

			webClient.Headers.Add("Content-Type", "application/json");

                // URL for `HTML to PDF` API call
				string url = Uri.EscapeUriString(string.Format(

				// Prepare requests params as JSON
				Dictionary<string, object> parameters = new Dictionary<string, object>();
				parameters.Add("name", Path.GetFileName(destinationFile));
				parameters.Add("templateId", templateId);
				parameters.Add("templateData", templateData);

				// Convert dictionary of params to JSON
				string jsonPayload = JsonConvert.SerializeObject(parameters);

                // Execute request
				string response = webClient.UploadString(url, jsonPayload);

	            // Parse JSON response
	            JObject json = JObject.Parse(response);

	            if (json["error"].ToObject<bool>() == false)
		            // Get URL of generated PDF file
		            string resultFileUrl = 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);
            catch (WebException e)


            Console.WriteLine("Press any key to exit...");

    "invoice_id": "1234567",
    "invoice_date": "April 30, 2016",
    "invoice_dateDue": "May 15, 2016",
    "paid": false,
    "issuer_name": "Acme Inc",
    "issuer_company": "Acme International",
    "issuer_address": "City, Street 3rd",
    "issuer_email": "",
    "issuer_website": "",
    "client_name": "Food Delivery Inc.",
    "client_company": "Food Delivery International",
    "client_address": "New York, Some Street, 42",
    "client_email": "",
    "items": [
            "name": "Setting up new web-site",
            "price": 250
            "name": "Website Content Addition",
            "price": 700
            "name": "Database Setup",
            "price": 200
            "name": "Record Digitalization",
            "price": 1800
            "name": "Cloud Storage",
            "price": 500
            "name": "Short Messages",
            "price": 35
            "name": "Search Engine Optimization",
            "price": 200
            "name": "Priority Support",
            "price": 75
            "name": "Configuring mail server and mailboxes",
            "price": 50
    "tax": 0.065,
    "discount": 0.01,
    "note": "Thank You For Your Business!"
} Web API: the Web API with a set of tools for documents manipulation, data conversion, data extraction, splitting and merging of documents. Includes image recognition, built-in OCR, barcode generation and barcode decoders to decode bar codes from scans, pictures and pdf.

Get your API key here!

Download Source Code (.zip)

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