Tài liệu dành cho nhà phát triển PDFiumPas

Component: TPdfView · Unit: PDFium

Reads or writes the TPdfView programmatic text-selection model without requiring user mouse input

Syntax

function SelectTextRange(Page, StartIndex, Count: Integer): Boolean;

Parameters

Page	Integer. One-based page number
StartIndex	Integer. Zero-based first character index
Count	Integer. Number of characters to select

Return Value

Boolean. True khi trang và phạm vi ký tự được yêu cầu là hợp lệ và đã được chọn

Description

The selection members expose the same page and character-index model used by viewer selection painting. Calls validate page numbers and character ranges before changing the selection

Programmatic selection works independently of user input options, then repaints the viewer and raises OnSelectionChange through the normal selection pipeline

Remarks

API names, type names, and PDF terms keep their original spelling so code search remains reliable
Call the member only after the owning document or viewer is active unless the syntax describes an event or design-time property

Example

if PdfView1.SelectTextRange(1, 0, 40) then
Memo1.Lines.Text := PdfView1.SelectedText;

SelectTextRange method