I put a empty TextFormField on a PDF. I want, that only a specific date format ("DD.MM.YY") can be filled in.
I was looking for examples in the communitiy, but didn't find anything.
C#
PdfTextFormField date1 = PdfTextFormField.CreateText(destPdf, new
Rectangle(200, 200, 60, 8), "_Date", "DD.MM.YY", fontHelvetica, 6);
form.AddField(date1);
The goal is, that the field does not allow other formats (best would be, if also 34.10.2019 would be denied)