I changed my code myself.
I used my self-made template, and changed the words like #NAME#
After changing the variable words from the file, save the file, make a PDF out of it. and done. (PDF wasn't part of the question, but i added it in for those interested).
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create(Person person)
datadir = ConfigurationManager.AppSettings["datadir"];
//datadirectory defined in Web.config
//also possible to hardcode it here, example: "c:/windows/PDFfolder"
wkhtmltopdf = ConfigurationManager.AppSettings["wkhtmltopdf"];
//directory to the file "wkhtmltopdf", downloaded it somewhere
//just like above, defined at web.config possible to hardcode it in
ViewData["IsModelValid"] = ModelState.IsValid ? "true" : "false";
//valid checker
if (ModelState.IsValid) //check if valid
{
db.People.Add(person); //add to db
db.SaveChanges();
var fileContents1 = System.IO.File.ReadAllText(datadir + "Template.html");
//get template from datadirectory
fileContents1 = fileContents1.Replace("#NAME#", person.Name);
//replace '#NAME#' by the name from the database table person.Name
System.IO.File.WriteAllText(datadir + "tmp\\Template." + person.ID + ".html", fileContents1);
//create a new html page with the replaced text
//name of the file equals the ID of the person
var pdf1 = new ProcessStartInfo(wkhtmltopdf); //start process wkhtmltopdf
pdf1.CreateNoWindow = true; //don't create a window
pdf1.UseShellExecute = false; //don't use a shell
pdf1.WorkingDirectory = datadir + "tmp\\"; //where to create the pdf
pdf1.Arguments = "-q -n --disable-smart-shrinking Overeenkomst." + person.ID + ".html Overeenkomst." + person.ID + ".pdf";
//get the html to convert and make a pdf with the same name in the same directory
}
return View(person);
}