如何使用 IronPDF 在 C# 中合并或拆分 PDF

using IronPdf;

// Two paged PDF
const string html_a =
    @"<p> [PDF_A] </p>
    <p> [PDF_A] 1st Page </p>
    <div style = 'page-break-after: always;' ></div>
    <p> [PDF_A] 2nd Page</p>";

// Two paged PDF
const string html_b =
    @"<p> [PDF_B] </p>
    <p> [PDF_B] 1st Page </p>
    <div style = 'page-break-after: always;' ></div>
    <p> [PDF_B] 2nd Page</p>";

var renderer = new ChromePdfRenderer();

var pdfdoc_a = renderer.RenderHtmlAsPdf(html_a);
var pdfdoc_b = renderer.RenderHtmlAsPdf(html_b);

// Four paged PDF
var merged = PdfDocument.Merge(pdfdoc_a, pdfdoc_b);
merged.SaveAs("Merged.pdf");

Imports IronPdf

' Two paged PDF
Private Const html_a As String = "<p> [PDF_A] </p>
    <p> [PDF_A] 1st Page </p>
    <div style = 'page-break-after: always;' ></div>
    <p> [PDF_A] 2nd Page</p>"

' Two paged PDF
Private Const html_b As String = "<p> [PDF_B] </p>
    <p> [PDF_B] 1st Page </p>
    <div style = 'page-break-after: always;' ></div>
    <p> [PDF_B] 2nd Page</p>"

Private renderer = New ChromePdfRenderer()

Private pdfdoc_a = renderer.RenderHtmlAsPdf(html_a)
Private pdfdoc_b = renderer.RenderHtmlAsPdf(html_b)

' Four paged PDF
Private merged = PdfDocument.Merge(pdfdoc_a, pdfdoc_b)
merged.SaveAs("Merged.pdf")

using IronPdf;

// Load an existing PDF document from a file.
PdfDocument pdf = PdfDocument.FromFile("Merged.pdf");

// Combine pages of the loaded PDF into a grid with specified dimensions.
// The parameters for CombinePages are the width and height of each page
// in millimeters followed by the number of rows and columns to create the grid.
int pageWidth = 250;  // Width of each page in the grid
int pageHeight = 250; // Height of each page in the grid
int rows = 2;         // Number of rows in the grid
int columns = 2;      // Number of columns in the grid

// Combine the pages of the PDF document into a single page with specified dimensions.
PdfDocument combinedPages = pdf.CombinePages(pageWidth, pageHeight, rows, columns);

// Save the combined document as a new PDF file.
combinedPages.SaveAs("combinedPages.pdf");

Imports IronPdf

' Load an existing PDF document from a file.
Private pdf As PdfDocument = PdfDocument.FromFile("Merged.pdf")

' Combine pages of the loaded PDF into a grid with specified dimensions.
' The parameters for CombinePages are the width and height of each page
' in millimeters followed by the number of rows and columns to create the grid.
Private pageWidth As Integer = 250 ' Width of each page in the grid
Private pageHeight As Integer = 250 ' Height of each page in the grid
Private rows As Integer = 2 ' Number of rows in the grid
Private columns As Integer = 2 ' Number of columns in the grid

' Combine the pages of the PDF document into a single page with specified dimensions.
Private combinedPages As PdfDocument = pdf.CombinePages(pageWidth, pageHeight, rows, columns)

' Save the combined document as a new PDF file.
combinedPages.SaveAs("combinedPages.pdf")

using IronPdf;

// We will use the 4-page PDF from the Merge example above:
var pdf = PdfDocument.FromFile("Merged.pdf");

// Takes only the first page into a new PDF
var page1doc = pdf.CopyPage(0);
page1doc.SaveAs("Page1Only.pdf");

// Take the pages 2 & 3 (Note: index starts at 0)
var page23doc = pdf.CopyPages(1, 2);
page23doc.SaveAs("Pages2to3.pdf");

Imports IronPdf

' We will use the 4-page PDF from the Merge example above:
Private pdf = PdfDocument.FromFile("Merged.pdf")

' Takes only the first page into a new PDF
Private page1doc = pdf.CopyPage(0)
page1doc.SaveAs("Page1Only.pdf")

' Take the pages 2 & 3 (Note: index starts at 0)
Dim page23doc = pdf.CopyPages(1, 2)
page23doc.SaveAs("Pages2to3.pdf")