Fill PDF checkbox with iText7

Question

Hello!
I’m trying to check a checbox of my PDF, but I’m not getting it right. Instead of just checking one of the checkboxes, he’s always checking all 3

What I would like:

What I am getting:

PDF in Adobe Reader editor. All 3 checkbox has the same name, this is giving the problem:

From what I’ve been doing, it seems that this export value has something to do with it.

My code:

private static void CreatePdf(string output)
{
    using var pdfDoc = new PdfDocument(new PdfReader("CheckTest.pdf"), new PdfWriter(output));
    var form = PdfAcroForm.GetAcroForm(pdfDoc, true);
    var check = form.GetField("Check");
    check.SetValue("01");
}

PDF link I used in the example: Link

Can someone help me mark the checkbox correctly?

Thank you!

Answer 1

That question was settled here: https://stackoverflow.com/questions/64858117/fill-pdf-check-field-with-itext7/64893012#64893012

Summarizing what was answered there, instead of filling the checkbox like this

check.SetValue("01");

I must fill in this way

check.SetValue("01", false);