`pdfExchangePages`

Page-tree structural edits: remove a page, reorder one,

int32_t __stdcall pdfDeletePage(PPDF IPDF, uint32_t PageNum);
BOOL32 __stdcall pdfMovePage(PPDF IPDF, uint32_t Source, uint32_t Dest);
int32_t __stdcall pdfClonePages(PPDF IPDF, int32_t FirstPage, int32_t LastPage, int32_t DestPage);
BOOL32 __stdcall pdfExchangePages(PPDF IPDF, uint32_t First, uint32_t Second);

Delphi

function pdfDeletePage(const IPDF: PPDF; PageNum: Cardinal): Integer; stdcall;
function pdfMovePage(const IPDF: PPDF; Source, Dest: Cardinal): LongBool; stdcall;
function pdfClonePages(const IPDF: PPDF; FirstPage, LastPage, DestPage: Integer): Integer; stdcall;
function pdfExchangePages(const IPDF: PPDF; First, Second: Cardinal): LongBool; stdcall;

Purpose. Page-tree structural edits: remove a page, reorder one, duplicate a range, or swap two pages' positions.

Description. All four are real page-tree mutations (DeletePageH/ MovePage/ClonePagesH/ExchangePagesH). pdfClonePages reports the range as a per-content-stream page-model operation — per a source comment on the underlying ClonePagesH, actual page-tree duplication in this single-content-stream-per-page engine model returns the count of pages that would be/were cloned within the given range.

Parameters.

Parameter	Description
`IPDF`	Document handle.
`PageNum`	(Delete only) `1`-based page to remove.
`Source`, `Dest`	(Move only) `1`-based source/destination positions.
`FirstPage`, `LastPage`, `DestPage`	(Clone only) Source range and insertion point.
`First`, `Second`	(Exchange only) The two `1`-based positions to swap.

Return value. pdfDeletePage: non-zero on success. pdfMovePage/ pdfExchangePages: True on success. pdfClonePages: the number of pages cloned; 0 on failure.

C# (P/Invoke)

wrappers/dotnet/LumasPdf.cs

[return: MarshalAs(UnmanagedType.Bool)]

Area

Core SDK