如何在 C# 中获取 PDF 页数

using IronPdf;
using System;
class Program
{
    static void Main(string[] args)
    {
        // Load an existing PDF document
        PdfDocument pdf = PdfDocument.FromFile("MultiPageDocument.pdf");
        // Get the page count - it's this simple!
        int pageCount = pdf.PageCount;
        // Display the result in the console
        Console.WriteLine($"The PDF has {pageCount} pages");
    }
}

Imports IronPdf
Imports System

Class Program
    Shared Sub Main(args As String())
        ' Load an existing PDF document
        Dim pdf As PdfDocument = PdfDocument.FromFile("MultiPageDocument.pdf")
        ' Get the page count - it's this simple!
        Dim pageCount As Integer = pdf.PageCount
        ' Display the result in the console
        Console.WriteLine($"The PDF has {pageCount} pages")
    End Sub
End Class

var pageCount = PdfDocument.FromFile("document.pdf").PageCount;

Dim pageCount = PdfDocument.FromFile("document.pdf").PageCount

using IronPdf;
using System;
using System.IO;
public class BatchProcessor
{
    public static void ProcessMultiplePdfs(object sender, EventArgs e)
    {
        string[] pdfFiles = Directory.GetFiles(@"C:\PDFs", "*.pdf");
        foreach (string file in pdfFiles)
        {
            try
            {
                // Open each PDF file
                using (var pdf = PdfDocument.FromFile(file))
                {
                    // Get the page count for this document
                    int count = pdf.PageCount;
                    // Extract just the filename for display
                    string fileName = Path.GetFileName(file);
                    // Output the result on a new line
                    Console.WriteLine($"{fileName}: {count} pages");
                    // Could save results or post to database here
                }
            }
            catch (Exception ex)
            {
                // Continue processing other files if one fails
                Console.WriteLine($"Error processing {file}: {ex.Message}");
                continue; // Use break only if you want to stop entirely
            }
        }
    }
}

Imports IronPdf
Imports System
Imports System.IO

Public Class BatchProcessor
    Public Shared Sub ProcessMultiplePdfs(sender As Object, e As EventArgs)
        Dim pdfFiles As String() = Directory.GetFiles("C:\PDFs", "*.pdf")
        For Each file As String In pdfFiles
            Try
                ' Open each PDF file
                Using pdf = PdfDocument.FromFile(file)
                    ' Get the page count for this document
                    Dim count As Integer = pdf.PageCount
                    ' Extract just the filename for display
                    Dim fileName As String = Path.GetFileName(file)
                    ' Output the result on a new line
                    Console.WriteLine($"{fileName}: {count} pages")
                    ' Could save results or post to database here
                End Using
            Catch ex As Exception
                ' Continue processing other files if one fails
                Console.WriteLine($"Error processing {file}: {ex.Message}")
                Continue For ' Use Exit For only if you want to stop entirely
            End Try
        Next
    End Sub
End Class