ExtractFilePageContentToStringA

Extraction, Page properties

Description

Ký tự A ở cuối biểu thị điểm vào DLL ANSI (char); bề mặt ActiveX/COM chỉ cung cấp dạng Unicode. Hành vi giống hệt với ExtractFilePageContentToString và các đối số chuỗi được diễn giải theo trang mã SetAnsiMode hiện tại

Extracts the raw content stream of a specified page from an external PDF file and returns it as a string. This function uses the direct access backend, avoiding loading the entire document into memory, which is ideal for large files.

Syntax

Delphi

Function DLExtractFilePageContentToStringA(InstanceID: Integer; InputFileName, Password: PAnsiChar; Page: Integer): PAnsiChar;

DLL

const char * DLExtractFilePageContentToStringA(int InstanceID, const char * InputFileName, const char * Password, int Page);

Parameters

InputFileName	The path to the source PDF file.
Password	The password to open the file. Pass an empty string if the file is not protected.
Page	The page number to extract (1-based).

Return values

Empty string	Failed to open file, invalid page, or extraction error.
Content string	The raw PDF content stream of the page.

Remarks

The returned string contains raw PDF page description instructions (such as drawing, text positioning operators). To extract human-readable text instead, use ExtractFilePageText.

Example

var Content: AnsiString;
Content := PDF.ExtractFilePageContentToString('sample.pdf', '', 1);
if Content <> '' then
  // Process the content instructions...