C# 如何向PDF文件添加密码保护
我使用以下代码:C# 如何向PDF文件添加密码保护,c#,itextsharp,C#,Itextsharp,我使用以下代码: string WorkingFolder = Environment.GetFolderPath(Environment.SpecialFolder.Desktop); string InputFile = Path.Combine(WorkingFolder, "PSNOs.pdf"); string OutputFile = Path.Combine(WorkingFolder, "PSNOs_enc.pdf"); using (Stream input = new Fil
string WorkingFolder = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
string InputFile = Path.Combine(WorkingFolder, "PSNOs.pdf");
string OutputFile = Path.Combine(WorkingFolder, "PSNOs_enc.pdf");
using (Stream input = new FileStream(InputFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
using (Stream output = new FileStream(OutputFile, FileMode.Create, FileAccess.Write, FileShare.None))
{
PdfReader reader = new PdfReader(input);
PdfEncryptor.Encrypt(reader, output, true, null, "secret", PdfWriter.ALLOW_SCREENREADERS);
}
}
但它正在创建另一个文件并向输出文件添加密码。
但是我不想像上面那样创建两个文件。我想在不创建其他文件的情况下,为输入文件
PSNOs.pdf
提供密码 不幸的是,必须这样做
我建议你:
您还可以看到使用iTextSharp创建受密码保护的PDF
string sourcePdf = @"D:\unsecuredfolder\unsecuredPage.pdf";
using (Stream input = new FileStream(sourcePdf , FileMode.Open, FileAccess.Read, FileShare.Read))
//Passowrd the pwd for PDF security
string destPdf = @"D:\securedfolder\securedPage.pdf";
/sourcePdf unsecured PDF file
//destPdf secured PDF file
{
using (Stream output = new FileStream(destPdf , FileMode.Create, FileAccess.Write, FileShare.None))
{
PdfReader reader = new PdfReader(input);
string Password="abc@123";
PdfEncryptor.Encrypt(reader, output, true, Password, Password, PdfWriter.ALLOW_PRINTING);
}
}
请详细说明此代码如何回答此问题。