@page
@{
    ViewData["Title"] = "UploadTest";
}

<h1>UploadTest</h1>

<form method="post" action="/api/zugferdvalidation" enctype="multipart/form-data" >
    <p>
        <span>PDF Datei:</span>
        <input type="file" name="files"  />
    </p>
    
    <button type="submit">Submit</button>
</form>