在IronPDF C#中如何扁平化PDF

using IronPdf;

// Load the flattened PDF
PdfDocument flattenedPdf = PdfDocument.FromFile("flattened.pdf");

// FormFieldCollection exposes Count directly on the Form property
if (flattenedPdf.Form.Count == 0)
{
    Console.WriteLine("PDF has been successfully flattened - no interactive fields remain.");
}
else
{
    Console.WriteLine($"Warning: {flattenedPdf.Form.Count} form fields still exist.");
}

Imports IronPdf

' Load the flattened PDF
Dim flattenedPdf As PdfDocument = PdfDocument.FromFile("flattened.pdf")

' FormFieldCollection exposes Count directly on the Form property
If flattenedPdf.Form.Count = 0 Then
    Console.WriteLine("PDF has been successfully flattened - no interactive fields remain.")
Else
    Console.WriteLine($"Warning: {flattenedPdf.Form.Count} form fields still exist.")
End If

using IronPdf;
using System.IO;

public class BatchPdfFlattener
{
    public static void FlattenAllPdfsInDirectory(string sourceDir, string outputDir)
    {
        // Ensure output directory exists
        Directory.CreateDirectory(outputDir);

        // Get all PDF files in source directory
        string[] pdfFiles = Directory.GetFiles(sourceDir, "*.pdf");

        foreach (string pdfFile in pdfFiles)
        {
            try
            {
                // Load the PDF
                PdfDocument pdf = PdfDocument.FromFile(pdfFile);

                // Flatten the document
                pdf.Flatten();

                // Save to output directory with "_flattened" suffix
                string fileName = Path.GetFileNameWithoutExtension(pdfFile);
                string outputPath = Path.Combine(outputDir, $"{fileName}_flattened.pdf");
                pdf.SaveAs(outputPath);

                Console.WriteLine($"Flattened: {fileName}");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error processing {pdfFile}: {ex.Message}");
            }
        }
    }
}

Imports IronPdf
Imports System.IO

Public Class BatchPdfFlattener
    Public Shared Sub FlattenAllPdfsInDirectory(sourceDir As String, outputDir As String)
        ' Ensure output directory exists
        Directory.CreateDirectory(outputDir)

        ' Get all PDF files in source directory
        Dim pdfFiles As String() = Directory.GetFiles(sourceDir, "*.pdf")

        For Each pdfFile As String In pdfFiles
            Try
                ' Load the PDF
                Dim pdf As PdfDocument = PdfDocument.FromFile(pdfFile)

                ' Flatten the document
                pdf.Flatten()

                ' Save to output directory with "_flattened" suffix
                Dim fileName As String = Path.GetFileNameWithoutExtension(pdfFile)
                Dim outputPath As String = Path.Combine(outputDir, $"{fileName}_flattened.pdf")
                pdf.SaveAs(outputPath)

                Console.WriteLine($"Flattened: {fileName}")
            Catch ex As Exception
                Console.WriteLine($"Error processing {pdfFile}: {ex.Message}")
            End Try
        Next
    End Sub
End Class