itextsharp:禁用pdf剪贴板

using System;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;

public class DisableClipboard
{
    public static void Main(string[] args)
    {
        // 输入和输出文件路径
        string inputFile = "input.pdf";
        string outputFile = "output.pdf";

        // 创建PdfReader对象
        PdfReader reader = new PdfReader(inputFile);

        // 创建PdfStamper对象
        PdfStamper stamper = new PdfStamper(reader, new FileStream(outputFile, FileMode.Create));

        // 获取PdfWriter对象
        PdfWriter writer = stamper.Writer;

        // 设置权限，禁用剪贴板
        writer.SetEncryption(null, null, PdfWriter.ALLOW_PRINTING, PdfWriter.STANDARD_ENCRYPTION_128 | PdfWriter.DO_NOT_ENCRYPT_METADATA);

        // 关闭PdfStamper对象
        stamper.Close();

        // 关闭PdfReader对象
        reader.Close();

        Console.WriteLine("禁用PDF剪贴板成功！");
    }
}