dynamicpdf Blog Convert HTML to PDF Using DynamicPDF HTML Converter
IntroductionThe DynamicPDF HTML Converter product is available and included with any of our subscription plans (subscription pricing). You can also use DynamicPDF HTML Converter free if you accept a small footer stating "Created with the DynamicPDF Essentials Edition" and link to the DynamicPDF website from a public area of your website. DynamicPDF HTML Converter supports the following features,quickly converts HTML to PDF,supports the latest HTML, CSS, and JavaScript,works with files, byte arrays, and URLs,supports custom headers and footers,supports .NET Framework and .NET Core (including Linux),and supports a transparent pricing model.As this tutorial will demonstrate, DynamicPDF HTML Converter is an intuitive yet powerful library for converting HTML files, URLs, and webpages into PDF documents. A video tutorial is also included if you prefer watching the video rather than reading this tutorial. Or better yet, watch the video and work through the written tutorial. All source is available on Github, and the video is available here or on our YouTube channel.The Converter and ConversionOptions ClassesThe DynamicPDF HTML Converter namespace (ceTe.DynamicPDF.HtmlConverter documentation), consists of four classes,ConversionOptions,Converter,LicensingException,UnitConverter,and two enumerations,PageOrientation,and PageSize.Of these, the two classes most important for understanding this tutorial are the Converter and ConversionOptions classes. The Converter class is how we convert the document from HTML to PDF using the static Convert or AsyncConvert methods. Both methods are overloaded to support different ways of processing HTML conversion. Although these two methods are all that is required, if you wish to perform any formatting of a PDF document, then you must use the ConversionOptions class to format that PDF. The ConversionOptions class supports specifying a PDF document's metadata, such as author, subject, and name. It also supports formating a PDF document by specifying page size, page orientation, headers, footers, and margins.Now that we discussed the Converter and ConversionOptions classes let's explore using these classes to convert and format HTML to PDF. Creating the ProjectStart by creating or downloading the project. You can choose to follow the instructions here or download the project from GitHub (link).Create a new Visual Studio Console App (.NET Core) named ConsoleAppHtmlToPdf. Add DynamicPDF HTML Converter NuGet package to the project (NuGet Package ID:ceTe.DynamicPDF.HtmlConverter.NET).The code should appear as follows.using System; using System.IO; using System.Threading; using System.Threading.Tasks; using ceTe.DynamicPDF.HtmlConverter; namespace ConsoleAppHtmlToPdf { class Program { static void Main(string[] args) { Console.WriteLine("Hello World!"); } } }Convert Dynamically Generate PDFAfter creating the project, in this first example, we dynamically generate a PDF using an HTML table generated by sample form data.Create a new method named ConvertDynamicHtmlToPdf and add a multidimensional array as a string parameter.Create sample data to load and display as an HTML table.static string[,] companyData = {{ "Grey Fox Brewing", "Mark Smith", "Canada" }, {"Deutsche Ingolstadt","Elias Schneider","Germany"}, {"Centro comercial Moctezuma","Alejandra Silva","Columbia"}, {"West Indies Trading Company","Helen Moore","UK"}, {"Bharat of India","Aarnav Chanda","India"}, {"Magazzini Alimentari Riuniti","Giovanni Esposito","Italy"}, {"Joyas de Cristal","Helena Garcia","Spain"}, {"Telemar Brasil","Elias Martinez","Brazil"}, {"Joe's Pizzaria","Joe Bowman","United States"} };The data consists of an array containing each entry which consists of the company name, contact name, and the country the company is located.static void ConvertDynamicHtmlToPdf(string[,] data) { string head = "<html><head><style>" + "table {font-family:arial, sans-serif;border-collapse:collapse;width:100%;}" + "td,th {border:1px solid #dddddd;text-align:left;padding:8px;}" + "tr:nth-child(even){background-color:#dddddd;}" + "</style></head><body>"; string title = "<h2>Company Contacts Listing</h2>"; string rowHeader = "<tr><th>Company</th><th>Contact</th>" + "<th>Country</th></tr>"; string[] tableTag = { "<table>", "</table>" }; string close = "</body></html>"; StringBuilder output = new StringBuilder(head).Append(title); output.Append(tableTag[0]); output.Append(rowHeader); int i = 0; foreach (string rec in companyData) { if (i++ % 3 == 0) output.Append("<tr>"); output.Append("<td>").Append(rec).Append("</td>"); if (i % 3 == 0) output.Append("</tr>"); } output.Append(tableTag[1]).Append(close); Converter.Convert(output.ToString(), "example5.pdf"); }After creating our newly created method, add it to the project's Main method.Modify Main to call the newly created method.Run the program and review the created PDF document.static void Main(string[] args) { ConvertSaveToFileNoInputHtml(); }As this first example illustrated, creating a PDF document from dynamically generated HTML data is straightforward and only required a document path as a URL and the PDF output.Convert HTML to PDF Using URIAs the previous example illustrated, generating PDF from HTML is easy when using DynamicPDF HTML Converter. Now let's convert a PDF using a URI to an HTML document, only this time we use a large HTML document combined with ConversionOptions to format the PDF and then save it to a local file. Create a new static method named ConvertSaveToFileNoInputHtml.Add the URL to the Project Guttenberg's "A Tale of Two Cities."Create a ConversionOptions instance and add the margins, author, creator, title, subject, and the header and footer to the ConversionOptions properties.Call the Converter.Convert method, passing the URL document to convert, the output path for the PDF document, and the conversion options.The code for the ConvertUriToPdf method should appear as follows. static void ConvertUriToPdf() { // method signature: public static void Convert(Uri uri, string outputPath, // ConversionOptions conversionOptions = null); string outputDocumentPath = "./tale-two-cities--document.pdf"; string taleOfTwoCities = "https://www.gutenberg.org/files/98/98-h/98-h.htm"; Uri resolvePath = new Uri(taleOfTwoCities); double leftRightMarginsPts = 36; double topBottomMarginsPts = 144; ConversionOptions conversionOptions = new ConversionOptions(PageSize.Letter, PageOrientation.Portrait, leftRightMarginsPts, topBottomMarginsPts); conversionOptions.Author = "Charles Dickens"; conversionOptions.Creator = "James B"; conversionOptions.Title = "A Tale of Two Cities"; conversionOptions.Subject = "Guttenberg press version of Charles Dickens\'s" + " A Tale of Two Cities."; conversionOptions.Header = "<div style = 'text-align:center;width:100%" +";font-size:15em;'>A Tale of Two Cities</div>"; conversionOptions.Footer = "<div style='text-align:left;" +"text-indent:10px;display:inline-block;" + "font-size:6em;'><span class=url></span></div>" + "<div style = 'text-align:center; display:inline-block; width:60%'></div>" + "<div style = 'text-align:right; display:inline-block;" +"font-size:6em;'>Page <span class=\"pageNumber\">" + "</span> of <span class=\"totalPages\"></span></div>"; Converter.Convert(resolvePath, outputDocumentPath, conversionOptions); }As this second example illustrated, the conversion from HTML to PDF in this example was also straightforward. The ConversionOptions class, although optional, provides powerful options to format a PDF. For example, in the code above, we created a header from CSS that wrote the title at the top of each page. We also created a footer from CSS that wrote the path and page number at the bottom of each page.Convert with Base Path and URIThe Convert method consists of an overloaded method that takes an input HTML string, a URL, and an optional ConversionOptions parameter. The following is the method's signature.public static void Convert(string inputHtml, string outputPath, Uri basePath = null, ConversionOptions conversionOptions = null);The inputHtml is the string content containing HTML, while the basePath is the URL to the document's root path. This overloaded Convert method is how we can process an HTML document using a baseTag. Refer to HTML baseTag on W3Schools for more details on HTML base paths.Create a static method named ConvertSaveToFileInputHtml.Add an array with two relative paths.Create a string containing links to the relative paths in the array.Create a new URI containing the path listed below to Wikimedia Commons.Call the Convert method, passing the input HTML, the output path, and the URI.Create a new ConversionOptions instance and set the page size, page orientation, and the left/right and bottom/top margins.Reduce the zoom to 25% by setting the Zoom property in ConversionOptions.Add the ConvertSaveToFileInputHtml method call to the Main method.static void ConvertSaveToFileInputHtml() { // method signature: public static void Convert(string inputHtml, string outputPath, // Uri basePath = null, ConversionOptions conversionOptions = null); string[] filePaths = new string[]{ "./e/ea/Doel_-_Water_pump_1.jpg", "./3/3a/The_Soviet_Union_1939_CPA_690_stamp_%28Plane%29_cancelled.jpg" }; string tempHtml = "<html><body><img src=\"" + filePaths[0] + "\">" + "<img src=\"" + filePaths[1] + "\">" + "</body></html>"; Uri resolvePath = new Uri("https://upload.wikimedia.org/wikipedia/commons/"); Converter.Convert(temp
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