private PdfFormField MergeFieldsWithTheSameName(PdfFormField newField) { String fullFieldName = newField.GetFieldName().ToUnicodeString(); PdfString fieldName = newField.GetPdfObject().GetAsString(PdfName.T); PdfFormField existingField = formTo.GetField(fullFieldName); if (existingField.IsFlushed()) { int index = 0; do { index++; newField.SetFieldName(fieldName.ToUnicodeString() + "_#" + index); fullFieldName = newField.GetFieldName().ToUnicodeString(); }while (formTo.GetField(fullFieldName) != null); return(newField); } newField.GetPdfObject().Remove(PdfName.T); newField.GetPdfObject().Remove(PdfName.P); PdfArray kids = existingField.GetKids(); if (kids != null && !kids.IsEmpty()) { existingField.AddKid(newField); return(existingField); } existingField.GetPdfObject().Remove(PdfName.T); existingField.GetPdfObject().Remove(PdfName.P); formTo.GetFields().Remove(existingField.GetPdfObject()); PdfFormField mergedField = PdfFormField.CreateEmptyField(documentTo); mergedField.Put(PdfName.FT, existingField.GetFormType()).Put(PdfName.T, fieldName); PdfDictionary parent = existingField.GetParent(); if (parent != null) { mergedField.Put(PdfName.Parent, parent); PdfArray parentKids = parent.GetAsArray(PdfName.Kids); for (int i = 0; i < parentKids.Size(); i++) { PdfObject obj = parentKids.Get(i); if (obj == existingField.GetPdfObject()) { parentKids.Set(i, mergedField.GetPdfObject()); break; } } } kids = existingField.GetKids(); if (kids != null) { mergedField.Put(PdfName.Kids, kids); } mergedField.AddKid(existingField).AddKid(newField); PdfObject value = existingField.GetValue(); if (value != null) { mergedField.Put(PdfName.V, existingField.GetPdfObject().Get(PdfName.V)); } return(mergedField); }