Steps to quickly build PDF documents in core share page 1 of 2


For example, we need to use PDF to develop some simple reports in core, which is not difficult, but we will still rush to search for some materials. Congratulations, this post will help you, and we will not waste some precious time.

In this article, we will use dinktodfs to process our PDF documents in the. Net core web program! Let’s not talk about it now, just start the interesting part.


You can get the source code by creating PDF document in my warehouse. Welcome to a free star

Now let’s create a. Net core 3.0 project. As for MVC, API, I don’t care. After the project is created, nuget directly installs dinktopdf. Then you need to download the “native library” folder in my code warehouse, where we will find two files 32bit and 64bit, so we need to select the appropriate library for the operating system. We will select files from the 64 bit folder.

Finally, we need to start the library, and IOC dinktopdf.

public void ConfigureServices(IServiceCollection services)
   var context = new CustomAssemblyLoadContext();
   context.LoadUnmanagedLibrary(Path.Combine(Directory.GetCurrentDirectory(), "libwkhtmltox.dll"));

   services.AddSingleton(typeof(IConverter), new SynchronizedConverter(new PdfTools()));

Establish entity#

In real-world projects, we can collect data from databases or receive data from other APIs. But for the sake of simplicity, we will collect the data of PDF documents from local storage. Later, we will create an HTML template and store it in a PDF document.

public class Employee
  public string Name { get; set; }
  public string LastName { get; set; }
  public int Age { get; set; }
  public string Gender { get; set; }

Then, we will create a new folder services and two kinds of files, dataservices.cs and templategenerator.cs. The complete structure shall be as follows:

public class DataServices
  public static List<Employee> GetAllEmployess() =>
   new List<Employee>
    new Employee { Name="Hao Zi Zhang", LastName="Turner", Age=35, Gender="Male"},
    new Employee { Name="Yu Chen", LastName="Markus", Age=22, Gender="Female"},
    new Employee { Name="Jian Zhi Chu", LastName="Martins", Age=40, Gender="Male"},
    new Employee { Name="ElderJames", LastName="Packner", Age=30, Gender="Female"},
    new Employee { Name="BlaZui", LastName="Doe", Age=45, Gender="Male"}

Some data is returned from the add service to simulate the service. We want to generate an HTML template, so we need to modify the templategenerator.cs file:

public class TempleGenertor
  public static string GetHTMLString()
   var employees = DataServices.GetAllEmployess();

   var sb = new StringBuilder();
        <div class='header'><h1>This is the generated PDF report!!!</h1></div>
        <table align='center'>

   foreach (var emp in employees)
         </tr>", emp.Name, emp.LastName, emp.Age, emp.Gender);

   return sb.ToString();

If you want to specify the CSS style, you can create some folders, and then choose the configuration through the server path in the API.

.header {
 text-align: center;
 color: green;
 padding-bottom: 35px;

table {
 width: 80%;
 border-collapse: collapse;

td, th {
 border: 1px solid gray;
 padding: 15px;
 font-size: 22px;
 text-align: center;

table th {
 background-color: green;
 color: white;

That’s it. We have HTML templates for HTML creation. Now, we can continue to execute the controller logic.

 public class PdfCreatorController : ControllerBase
  private IConverter _converter;

  public PdfCreatorController(IConverter converter)
   _converter = converter;

  public IActionResult CreatePDF()
   var globalSettings = new GlobalSettings
    ColorMode = ColorMode.Color,
    Orientation = Orientation.Portrait,
    PaperSize = PaperKind.A4,
    Margins = new MarginSettings { Top = 10 },
    DocumentTitle = "PDF Report"

   var objectSettings = new ObjectSettings
    PagesCount = true,
    HtmlContent = TempleGenertor.GetHTMLString(),
    WebSettings = { DefaultEncoding = "utf-8", UserStyleSheet = Path.Combine(Directory.GetCurrentDirectory(), "assets", "style.css") },
    HeaderSettings = { FontName = "Arial", FontSize = 9, Right = "Page 
                        12 read next page

  • core
  • pdf

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