Is it possible to modify PDF Form Field Names?

Question

Here\'s the situation. I have a PDF with automatically generated pdf form field names. The problem is that these names are not very user friendly. They look something like :

Answer 1

I had the problem yesterday and after trying out answers in the forum and others but made no headway. My code looked like this.

// Open up the file and read the fields on it.
var pdfReader = new PdfReader(PATH_TO_PDF);
var fs = new FileStream(pdfFilename, FileMode.Create, FileAccess.ReadWrite)
var stamper = new PdfStamper(pdfReader, fs);
var pdfFields = stamper.AcroFields;

//I thought this next line of code I commented out will do it
//pdfFields.RenameField("currentFieldName", "newFieldName");

// It did for some fields, but returned false for others.
// Then I looked at the AcroFields.RenameField method in itextSharp source and noticed some restrictions. You may want to do the same.
//  So I replaced that line  pdfFields.RenameField(currentFieldName, newFieldName); with these 5 lines

AcroFields.Item item = pdfFields.Fields[currentFieldName];
PdfString ss = new PdfString(newFieldName, PdfObject.TEXT_UNICODE);
item.WriteToAll(PdfName.T, ss, AcroFields.Item.WRITE_VALUE | AcroFields.Item.WRITE_MERGED);
item.MarkUsed(pdfFields, AcroFields.Item.WRITE_VALUE);
pdfFields.Fields[newFieldName] = item;

And that did the job