FormField - TPdf - PDFiumVCL

Ten wpis API zachowuje identyfikatory, sygnatury, bloki kodu i terminy PDF w oryginalnej postaci.

Component: TPdf · Unit: PDFium

Indexed property — returns one form field on the current page

Syntax

property FormField[Index: Integer]: TPdfFormFieldInfo; // read only

Description

Indexed read-only property that returns one form field on the current page

Requires Active to be True. The result is undefined when the index is outside the valid range; pass values in 0 .. FormFieldCount - 1 (or use the array's Length for non-counted variants).

The returned record is a snapshot of the value at the time of the call; subsequent edits to the document do not modify previously returned records.

Parameters

Index Zero-based index in the range 0 .. FormFieldCount - 1.

Remarks

The records are decoded lazily — the first access on a page may parse the /Annots, /Outlines, or /Names tree.
Edits made through TPdf (CreateAnnotation, DeleteAnnotation, etc.) invalidate any indices held by the application; re-enumerate after edits.
All coordinate fields use PDF user-space points with the origin at the bottom-left corner of the page.

Example

var
  I: Integer;
begin
  if not Pdf1.Active then Exit;
  for I := 0 to Pdf1.FormFieldCount - 1 do
  begin
    // inspect Pdf1.FormField[I]
    Memo1.Lines.Add(IntToStr(I));
  end;
end;

FormField property