.NET合并PDF：使用IronPDF合并多个文件

Install-Package IronPdf

dotnet add package IronPdf

using IronPdf;

// Load the PDF documents
var pdf1 = PdfDocument.FromFile("Invoice1.pdf");
var pdf2 = PdfDocument.FromFile("Invoice2.pdf");

// Merge the documents
var merged = PdfDocument.Merge(pdf1, pdf2);

// Save the merged document
merged.SaveAs("Merged.pdf");

Imports IronPdf

' Load the PDF documents
Dim pdf1 = PdfDocument.FromFile("Invoice1.pdf")
Dim pdf2 = PdfDocument.FromFile("Invoice2.pdf")

' Merge the documents
Dim merged = PdfDocument.Merge(pdf1, pdf2)

' Save the merged document
merged.SaveAs("Merged.pdf")

using IronPdf;
using System.Collections.Generic;
using System.IO;

// Create a list to store PDF documents
var files = new List<PdfDocument>();

// Get all PDF files from a directory
string[] fileNames = Directory.GetFiles(@"C:\Reports\", "*.pdf");

// Load each PDF file
foreach (var fileName in fileNames)
{
    files.Add(PdfDocument.FromFile(fileName));
}

// Merge all PDFs into one
var merged = PdfDocument.Merge(files);

// Save the combined document
merged.SaveAs("CombinedReports.pdf");

Imports IronPdf
Imports System.Collections.Generic
Imports System.IO

' Create a list to store PDF documents
Dim files As New List(Of PdfDocument)()

' Get all PDF files from a directory
Dim fileNames As String() = Directory.GetFiles("C:\Reports\", "*.pdf")

' Load each PDF file
For Each fileName In fileNames
    files.Add(PdfDocument.FromFile(fileName))
Next

' Merge all PDFs into one
Dim merged As PdfDocument = PdfDocument.Merge(files)

' Save the combined document
merged.SaveAs("CombinedReports.pdf")

using IronPdf;

var renderer = new ChromePdfRenderer();

// Create a PDF from HTML
string html = @"<h1>Cover Page</h1>
               <p>Example PDF From Multiple Sources</p>
               <div style='page-break-after: always;'></div>";
var coverPage = renderer.RenderHtmlAsPdf(html);

// Load an existing PDF report
var pdf = PdfDocument.FromFile("invoice.pdf");

// Create a summary from URL
var summary = renderer.RenderUrlAsPdf("https://en.wikipedia.org/wiki/PDF");

// Merge all three sources
var finalDocument = PdfDocument.Merge(new[] { coverPage, pdf, summary });

// Save the complete document
finalDocument.SaveAs("MultipleSources.pdf");

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Create a PDF from HTML
Dim html As String = "<h1>Cover Page</h1>
                      <p>Example PDF From Multiple Sources</p>
                      <div style='page-break-after: always;'></div>"
Dim coverPage As PdfDocument = renderer.RenderHtmlAsPdf(html)

' Load an existing PDF report
Dim pdf As PdfDocument = PdfDocument.FromFile("invoice.pdf")

' Create a summary from URL
Dim summary As PdfDocument = renderer.RenderUrlAsPdf("https://en.wikipedia.org/wiki/PDF")

' Merge all three sources
Dim finalDocument As PdfDocument = PdfDocument.Merge(New PdfDocument() {coverPage, pdf, summary})

' Save the complete document
finalDocument.SaveAs("MultipleSources.pdf")

using IronPdf;
using IronPdf.Editing;

var pdf1 = PdfDocument.FromFile("Report-January.pdf");
var pdf2 = PdfDocument.FromFile("Report-February.pdf");

var merged = PdfDocument.Merge(pdf1, pdf2);

// Add a text-based header across all pages
var headerStamper = new HtmlHeaderFooter
{
    HtmlFragment = "<div style='text-align:right;font-size:10px;'>Quarterly Report</div>"
};
merged.AddHtmlHeadersAndFooters(headerStamper);

// Apply password protection
merged.SecuritySettings.UserPassword = "YourPassword";
merged.SecuritySettings.OwnerPassword = "OwnerSecret";

// Save the final, protected document
merged.SaveAs("QuarterlyReport_Protected.pdf");

Imports IronPdf
Imports IronPdf.Editing

Dim pdf1 = PdfDocument.FromFile("Report-January.pdf")
Dim pdf2 = PdfDocument.FromFile("Report-February.pdf")

Dim merged = PdfDocument.Merge(pdf1, pdf2)

' Add a text-based header across all pages
Dim headerStamper As New HtmlHeaderFooter With {
    .HtmlFragment = "<div style='text-align:right;font-size:10px;'>Quarterly Report</div>"
}
merged.AddHtmlHeadersAndFooters(headerStamper)

' Apply password protection
merged.SecuritySettings.UserPassword = "YourPassword"
merged.SecuritySettings.OwnerPassword = "OwnerSecret"

' Save the final, protected document
merged.SaveAs("QuarterlyReport_Protected.pdf")