GetStringListItem

Miscellaneous functions

Description

Returns the string at position ItemIndex in the string list identified by StringListID. String lists are produced by other API functions — most commonly CheckFileCompliance, which returns one entry per detected compliance issue.

Syntax

Delphi

function TPDFlib.GetStringListItem(StringListID, ItemIndex: Integer): WideString;

ActiveX

Function PDFlib::GetStringListItem(StringListID As Long, ItemIndex As Long) As String

DLL

wchar_t * DLGetStringListItem(int InstanceID, int StringListID, int ItemIndex);

Parameters

StringListID	The ID of the string list as returned by a producer function such as CheckFileCompliance.
ItemIndex	The one-based index of the item to retrieve. The first item is `1`; the last item is GetStringListCount(StringListID). Out-of-range indices return an empty string.

Return value

The string at the requested index, or an empty string if StringListID is invalid or ItemIndex is outside [1 .. GetStringListCount].

Remarks

For lists produced by CheckFileCompliance the item format is CODE: human-readable description, where CODE is one of the five-digit issue codes documented on the CheckFileCompliance page (00002, 00003, 00005, 00006, 00007, 00011, 00012). Strip the prefix before the colon to act on the code programmatically.

Example

// Parse the issue code from each compliance issue line
var
  Issues, Count, I, ColonPos: Integer;
  Line, Code: WideString;
begin
  Issues := PDF.CheckFileCompliance('archive.pdf', '', 1, 0);
  if Issues = 0 then Exit;

  Count := PDF.GetStringListCount(Issues);
  for I := 1 to Count do
  begin
    Line := PDF.GetStringListItem(Issues, I);
    ColonPos := Pos(':', Line);
    if ColonPos > 0 then
      Code := Trim(Copy(Line, 1, ColonPos - 1))
    else
      Code := Line;

    if Code = '00006' then
      WriteLn('Document is encrypted — cannot be PDF/A')
    else
      WriteLn('Issue ', Code, ': ', Line);
  end;
  PDF.ReleaseStringList(Issues);
end;