將 QR 碼蓋印至 PDF

VB C#

using IronQr;
using IronPdf;
using IronSoftware.Drawing;

// Generate QR code and save as bitmap
AnyBitmap qrBitmap = QrWriter.Write("hello world").Save();

// Load an existing PDF document
PdfDocument pdf = PdfDocument.FromFile("sample.pdf");

// Stamp the QR code onto the first page at position x=505, y=20 (top-right corner)
pdf.DrawBitmap(qrBitmap, pageIndex: 0, x: 505, y: 20, desiredWidth: 70, desiredHeight: 70, pixelFormat: PixelFormat.Format32bppArgb, ignorePageRotation: false);

// Save the modified PDF
pdf.SaveAs("output.pdf");

Imports IronQr
Imports IronPdf
Imports IronSoftware.Drawing

' Generate QR code and save as bitmap
Dim qrBitmap As AnyBitmap = QrWriter.Write("hello world").Save()

' Load an existing PDF document
Dim pdf As PdfDocument = PdfDocument.FromFile("sample.pdf")

' Stamp the QR code onto the first page at position x=505, y=20 (top-right corner)
pdf.DrawBitmap(qrBitmap, pageIndex:=0, x:=505, y:=20, desiredWidth:=70, desiredHeight:=70, pixelFormat:=PixelFormat.Format32bppArgb, ignorePageRotation:=False)

' Save the modified PDF
pdf.SaveAs("output.pdf")

Install-Package IronQR

將 QR 碼蓋印至 PDF

直接將QR碼蓋印在現有的PDF頁面上，嵌入可掃描的資訊而不需重新結構化文件。 IronQR通過三個步驟處理此問題：用DrawBitmap，以精準控制蓋印的尺寸。

將QR碼蓋印到PDF的三步指南

AnyBitmap qrBitmap = QrWriter.Write("hello world").Save();
PdfDocument pdf = PdfDocument.FromFile("sample.pdf");
pdf.DrawBitmap(qrBitmap, pageIndex: 0, x: 505, y: 20, desiredWidth: 70, desiredHeight: 70, pixelFormat: PixelFormat.Format32bppArgb, ignorePageRotation: false);