IronPDF与iText7的比较

using IronPdf;

// Disable local disk access or cross-origin requests
Installation.EnableWebSecurity = true;

// Instantiate Renderer
var renderer = new ChromePdfRenderer();

// Create a PDF from an HTML string using C#
var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>");
pdf.SaveAs("output.pdf");

// Advanced Example with HTML Assets
// Load external html assets: images, CSS and JavaScript.
// An optional BasePath 'C:\site\assets\' is set as the file location to load assets from
var myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\");
myAdvancedPdf.SaveAs("html-with-assets.pdf");

Imports IronPdf

' Disable local disk access or cross-origin requests
Installation.EnableWebSecurity = True

' Instantiate Renderer
Dim renderer = New ChromePdfRenderer()

' Create a PDF from an HTML string using C#
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>")
pdf.SaveAs("output.pdf")

' Advanced Example with HTML Assets
' Load external html assets: images, CSS and JavaScript.
' An optional BasePath 'C:\site\assets\' is set as the file location to load assets from
Dim myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", "C:\site\assets\")
myAdvancedPdf.SaveAs("html-with-assets.pdf")

using iText.Html2pdf;

static void Main(string[] args)
  {
    using (FileStream htmlSource = File.Open("input.html", FileMode.Open))
    using (FileStream pdfDest = File.Open("output.pdf", FileMode.Create))
    {
        ConverterProperties converterProperties = new ConverterProperties();
        HtmlConverter.ConvertToPdf(htmlSource, pdfDest, converterProperties);
    }
  }

Imports iText.Html2pdf

Shared Sub Main(ByVal args() As String)
	Using htmlSource As FileStream = File.Open("input.html", FileMode.Open)
	Using pdfDest As FileStream = File.Open("output.pdf", FileMode.Create)
		Dim converterProperties As New ConverterProperties()
		HtmlConverter.ConvertToPdf(htmlSource, pdfDest, converterProperties)
	End Using
	End Using
End Sub

using IronPdf;
using System;

// Open an Encrypted File, alternatively create a new PDF from Html
var pdf = PdfDocument.FromFile("encrypted.pdf", "password");

// Edit file metadata
pdf.MetaData.Author = "Satoshi Nakamoto";
pdf.MetaData.Keywords = "SEO, Friendly";
pdf.MetaData.ModifiedDate = DateTime.Now;

// Edit file security settings
// The following code makes a PDF read only and will disallow copy & paste and printing
pdf.SecuritySettings.RemovePasswordsAndEncryption();
pdf.SecuritySettings.MakePdfDocumentReadOnly("secret-key");
pdf.SecuritySettings.AllowUserAnnotations = false;
pdf.SecuritySettings.AllowUserCopyPasteContent = false;
pdf.SecuritySettings.AllowUserFormData = false;
pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights;

// change or set the document encryption password
pdf.Password = "my-password";
pdf.SaveAs("secured.pdf");

Imports IronPdf
Imports System

' Open an Encrypted File, alternatively create a new PDF from Html
Private pdf = PdfDocument.FromFile("encrypted.pdf", "password")

' Edit file metadata
pdf.MetaData.Author = "Satoshi Nakamoto"
pdf.MetaData.Keywords = "SEO, Friendly"
pdf.MetaData.ModifiedDate = DateTime.Now

' Edit file security settings
' The following code makes a PDF read only and will disallow copy & paste and printing
pdf.SecuritySettings.RemovePasswordsAndEncryption()
pdf.SecuritySettings.MakePdfDocumentReadOnly("secret-key")
pdf.SecuritySettings.AllowUserAnnotations = False
pdf.SecuritySettings.AllowUserCopyPasteContent = False
pdf.SecuritySettings.AllowUserFormData = False
pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.FullPrintRights

' change or set the document encryption password
pdf.Password = "my-password"
pdf.SaveAs("secured.pdf")

using System;
using System.IO;
using System.Text;
using iText.Kernel.Pdf;

public class EncryptPdf
    {
        public static readonly String DEST = "results/sandbox/security/encrypt_pdf.pdf";
        public static readonly String SRC = "../../../resources/pdfs/hello.pdf";

        public static readonly String OWNER_PASSWORD = "World";
        public static readonly String USER_PASSWORD = "Hello";

        public static void Main(String[] args)
        {
            FileInfo file = new FileInfo(DEST);
            file.Directory.Create();

            new EncryptPdf().ManipulatePdf(DEST);
        }

        protected void ManipulatePdf(String dest)
        {
            PdfDocument document = new PdfDocument(new PdfReader(SRC), new PdfWriter(dest,
                new WriterProperties().SetStandardEncryption(
                    Encoding.UTF8.GetBytes(USER_PASSWORD),
                    Encoding.UTF8.GetBytes(OWNER_PASSWORD),
                    EncryptionConstants.ALLOW_PRINTING,
                    EncryptionConstants.ENCRYPTION_AES_128 
 EncryptionConstants.DO_NOT_ENCRYPT_METADATA
                )));
            document.Close();
        }
    }

IRON VB CONVERTER ERROR developers@ironsoftware.com

using IronPdf;

PdfDocument pdf = PdfDocument.FromFile("novel.pdf");

// Redact 'are' phrase from all pages
pdf.RedactTextOnAllPages("are");

pdf.SaveAs("redacted.pdf");

Imports IronPdf

Private pdf As PdfDocument = PdfDocument.FromFile("novel.pdf")

' Redact 'are' phrase from all pages
pdf.RedactTextOnAllPages("are")

pdf.SaveAs("redacted.pdf")

using System;
using System.IO;
using iText.Kernel.Pdf;
using iText.Layout;
using iText.Layout.Element;
using iText.Layout.Properties;
using iText.Kernel.Colors;

string src = "input.pdf";
string dest = "output_redacted.pdf";

using (PdfReader reader = new PdfReader(src))
            {
                using (PdfWriter writer = new PdfWriter(dest))
                {
                    using (PdfDocument pdfDoc = new PdfDocument(reader, writer))
                    {
                        // Iterate through each page
                        for (int pageNum = 1; pageNum <= pdfDoc.GetNumberOfPages(); pageNum++)
                        {
                            PdfPage page = pdfDoc.GetPage(pageNum);
                            PdfCanvas canvas = new PdfCanvas(page);
                            Rectangle[] rectanglesToRedact = { new Rectangle(100, 100, 200, 50) }; // Example: Define rectangles to redact

                            // Overlay black rectangles to simulate redaction
                            foreach (Rectangle rect in rectanglesToRedact)
                            {
                                canvas.SetFillColor(ColorConstants.BLACK)
                                    .Rectangle(rect.GetX(), rect.GetY(), rect.GetWidth(), rect.GetHeight())
                                    .Fill();
                            }
                        }
                    }
                }

Imports System
Imports System.IO
Imports iText.Kernel.Pdf
Imports iText.Layout
Imports iText.Layout.Element
Imports iText.Layout.Properties
Imports iText.Kernel.Colors

Private src As String = "input.pdf"
Private dest As String = "output_redacted.pdf"

Using reader As New PdfReader(src)
				Using writer As New PdfWriter(dest)
					Using pdfDoc As New PdfDocument(reader, writer)
						' Iterate through each page
						Dim pageNum As Integer = 1
						Do While pageNum <= pdfDoc.GetNumberOfPages()
							Dim page As PdfPage = pdfDoc.GetPage(pageNum)
							Dim canvas As New PdfCanvas(page)
							Dim rectanglesToRedact() As Rectangle = { New Rectangle(100, 100, 200, 50) } ' Example: Define rectangles to redact

							' Overlay black rectangles to simulate redaction
							For Each rect As Rectangle In rectanglesToRedact
								canvas.SetFillColor(ColorConstants.BLACK).Rectangle(rect.GetX(), rect.GetY(), rect.GetWidth(), rect.GetHeight()).Fill()
							Next rect
							pageNum += 1
						Loop
					End Using
				End Using

using IronPdf;
using IronPdf.Signing;
using System.Security.Cryptography.X509Certificates;

// Create X509Certificate2 object with X509KeyStorageFlags set to Exportable
X509Certificate2 cert = new X509Certificate2("IronSoftware.pfx", "123456", X509KeyStorageFlags.Exportable);

// Create PdfSignature object
var sig = new PdfSignature(cert);

// Sign PDF document
PdfDocument pdf = PdfDocument.FromFile("document.pdf");
pdf.Sign(sig);
pdf.SaveAs("signed.pdf");

Imports IronPdf
Imports IronPdf.Signing
Imports System.Security.Cryptography.X509Certificates

' Create X509Certificate2 object with X509KeyStorageFlags set to Exportable
Private cert As New X509Certificate2("IronSoftware.pfx", "123456", X509KeyStorageFlags.Exportable)

' Create PdfSignature object
Private sig = New PdfSignature(cert)

' Sign PDF document
Private pdf As PdfDocument = PdfDocument.FromFile("document.pdf")
pdf.Sign(sig)
pdf.SaveAs("signed.pdf")

using System;
using System.IO;
using iText.Kernel.Pdf;
using iText.Signatures;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Pkcs;
using Org.BouncyCastle.X509;

class Program
{
    static void Main(string[] args)
    {
        string src = "input.pdf";
        string dest = "output_signed.pdf";
        string pfxFile = "your_certificate.pfx";
        string pfxPassword = "your_password";

        try
        {
            // Load your certificate
            Pkcs12Store ks = new Pkcs12Store(new FileStream(pfxFile, FileMode.Open), pfxPassword.ToCharArray());
            string alias = null;
            foreach (string al in ks.Aliases)
            {
                if (ks.IsKeyEntry(al))
                {
                    alias = al;
                    break;
                }
            }
            ICipherParameters pk = ks.GetKey(alias).Key;
            X509CertificateEntry[] chain = ks.GetCertificateChain(alias);
            X509Certificate2 cert = new X509Certificate2(chain[0].Certificate.GetEncoded());

            // Create output PDF with signed content
            using (PdfReader reader = new PdfReader(src))
            {
                using (PdfWriter writer = new PdfWriter(dest))
                {
                    using (PdfDocument pdfDoc = new PdfDocument(reader, writer))
                    {
                        // Create the signer
                        PdfSigner signer = new PdfSigner(pdfDoc, writer, new StampingProperties().UseAppendMode());

                        // Configure signature appearance
                        PdfSignatureAppearance appearance = signer.GetSignatureAppearance();
                        appearance.SetReason("Digital Signature");
                        appearance.SetLocation("Your Location");
                        appearance.SetContact("Your Contact");

                        // Create signature
                        IExternalSignature pks = new PrivateKeySignature(pk, "SHA-256");
                        signer.SignDetached(pks, chain, null, null, null, 0, PdfSigner.CryptoStandard.CMS);
                    }
                }
            }
            Console.WriteLine($"PDF digitally signed successfully: {dest}");
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Error signing PDF: {ex.Message}");
        }
    }
}

Imports System
Imports System.IO
Imports iText.Kernel.Pdf
Imports iText.Signatures
Imports Org.BouncyCastle.Crypto
Imports Org.BouncyCastle.Pkcs
Imports Org.BouncyCastle.X509

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		Dim src As String = "input.pdf"
		Dim dest As String = "output_signed.pdf"
		Dim pfxFile As String = "your_certificate.pfx"
		Dim pfxPassword As String = "your_password"

		Try
			' Load your certificate
			Dim ks As New Pkcs12Store(New FileStream(pfxFile, FileMode.Open), pfxPassword.ToCharArray())
			Dim [alias] As String = Nothing
			For Each al As String In ks.Aliases
				If ks.IsKeyEntry(al) Then
					[alias] = al
					Exit For
				End If
			Next al
			Dim pk As ICipherParameters = ks.GetKey([alias]).Key
			Dim chain() As X509CertificateEntry = ks.GetCertificateChain([alias])
			Dim cert As New X509Certificate2(chain(0).Certificate.GetEncoded())

			' Create output PDF with signed content
			Using reader As New PdfReader(src)
				Using writer As New PdfWriter(dest)
					Using pdfDoc As New PdfDocument(reader, writer)
						' Create the signer
						Dim signer As New PdfSigner(pdfDoc, writer, (New StampingProperties()).UseAppendMode())

						' Configure signature appearance
						Dim appearance As PdfSignatureAppearance = signer.GetSignatureAppearance()
						appearance.SetReason("Digital Signature")
						appearance.SetLocation("Your Location")
						appearance.SetContact("Your Contact")

						' Create signature
						Dim pks As IExternalSignature = New PrivateKeySignature(pk, "SHA-256")
						signer.SignDetached(pks, chain, Nothing, Nothing, Nothing, 0, PdfSigner.CryptoStandard.CMS)
					End Using
				End Using
			End Using
			Console.WriteLine($"PDF digitally signed successfully: {dest}")
		Catch ex As Exception
			Console.WriteLine($"Error signing PDF: {ex.Message}")
		End Try
	End Sub
End Class

using IronPdf;

// Stamps a Watermark onto a new or existing PDF
var renderer = new ChromePdfRenderer();

var pdf = renderer.RenderUrlAsPdf("https://www.nuget.org/packages/IronPdf");
pdf.ApplyWatermark("<h2 style='color:red'>SAMPLE</h2>", 30, IronPdf.Editing.VerticalAlignment.Middle, IronPdf.Editing.HorizontalAlignment.Center);
pdf.SaveAs(@"C:\Path\To\Watermarked.pdf");

Imports IronPdf

' Stamps a Watermark onto a new or existing PDF
Private renderer = New ChromePdfRenderer()

Private pdf = renderer.RenderUrlAsPdf("https://www.nuget.org/packages/IronPdf")
pdf.ApplyWatermark("<h2 style='color:red'>SAMPLE</h2>", 30, IronPdf.Editing.VerticalAlignment.Middle, IronPdf.Editing.HorizontalAlignment.Center)
pdf.SaveAs("C:\Path\To\Watermarked.pdf")

using iText.IO.Font;
using iText.IO.Font.Constants;
using iText.Kernel.Colors;
using iText.Kernel.Font;
using iText.Kernel.Pdf;
using iText.Kernel.Pdf.Canvas;
using iText.Kernel.Pdf.Extgstate;
using iText.Layout;
using iText.Layout.Element;
using iText.Layout.Properties;

public class TransparentWatermark 
    {
        public static readonly String DEST = "results/sandbox/stamper/transparent_watermark.pdf";
        public static readonly String SRC = "../../../resources/pdfs/hero.pdf";

        public static void Main(String[] args) 
        {
            FileInfo file = new FileInfo(DEST);
            file.Directory.Create();

            new TransparentWatermark().ManipulatePdf(DEST);
        }

        protected void ManipulatePdf(String dest) 
        {
            PdfDocument pdfDoc = new PdfDocument(new PdfReader(SRC), new PdfWriter(dest));
            PdfCanvas under = new PdfCanvas(pdfDoc.GetFirstPage().NewContentStreamBefore(), new PdfResources(), pdfDoc);
            PdfFont font = PdfFontFactory.CreateFont(FontProgramFactory.CreateFont(StandardFonts.HELVETICA));
            Paragraph paragraph = new Paragraph("This watermark is added UNDER the existing content")
                    .SetFont(font)
                    .SetFontSize(15);

            Canvas canvasWatermark1 = new Canvas(under, pdfDoc.GetDefaultPageSize())
                    .ShowTextAligned(paragraph, 297, 550, 1, TextAlignment.CENTER, VerticalAlignment.TOP, 0);
            canvasWatermark1.Close();
            PdfCanvas over = new PdfCanvas(pdfDoc.GetFirstPage());
            over.SetFillColor(ColorConstants.BLACK);
            paragraph = new Paragraph("This watermark is added ON TOP OF the existing content")
                    .SetFont(font)
                    .SetFontSize(15);

            Canvas canvasWatermark2 = new Canvas(over, pdfDoc.GetDefaultPageSize())
                    .ShowTextAligned(paragraph, 297, 500, 1, TextAlignment.CENTER, VerticalAlignment.TOP, 0);
            canvasWatermark2.Close();
            paragraph = new Paragraph("This TRANSPARENT watermark is added ON TOP OF the existing content")
                    .SetFont(font)
                    .SetFontSize(15);
            over.SaveState();

            // Creating a dictionary that maps resource names to graphics state parameter dictionaries
            PdfExtGState gs1 = new PdfExtGState();
            gs1.SetFillOpacity(0.5f);
            over.SetExtGState(gs1);
            Canvas canvasWatermark3 = new Canvas(over, pdfDoc.GetDefaultPageSize())
                    .ShowTextAligned(paragraph, 297, 450, 1, TextAlignment.CENTER, VerticalAlignment.TOP, 0);
            canvasWatermark3.Close();
            over.RestoreState();

            pdfDoc.Close();
        }
    }

Imports iText.IO.Font
Imports iText.IO.Font.Constants
Imports iText.Kernel.Colors
Imports iText.Kernel.Font
Imports iText.Kernel.Pdf
Imports iText.Kernel.Pdf.Canvas
Imports iText.Kernel.Pdf.Extgstate
Imports iText.Layout
Imports iText.Layout.Element
Imports iText.Layout.Properties

Public Class TransparentWatermark
		Public Shared ReadOnly DEST As String = "results/sandbox/stamper/transparent_watermark.pdf"
		Public Shared ReadOnly SRC As String = "../../../resources/pdfs/hero.pdf"

		Public Shared Sub Main(ByVal args() As String)
			Dim file As New FileInfo(DEST)
			file.Directory.Create()

			Call (New TransparentWatermark()).ManipulatePdf(DEST)
		End Sub

		Protected Sub ManipulatePdf(ByVal dest As String)
			Dim pdfDoc As New PdfDocument(New PdfReader(SRC), New PdfWriter(dest))
			Dim under As New PdfCanvas(pdfDoc.GetFirstPage().NewContentStreamBefore(), New PdfResources(), pdfDoc)
			Dim font As PdfFont = PdfFontFactory.CreateFont(FontProgramFactory.CreateFont(StandardFonts.HELVETICA))
			Dim paragraph As Paragraph = (New Paragraph("This watermark is added UNDER the existing content")).SetFont(font).SetFontSize(15)

			Dim canvasWatermark1 As Canvas = (New Canvas(under, pdfDoc.GetDefaultPageSize())).ShowTextAligned(paragraph, 297, 550, 1, TextAlignment.CENTER, VerticalAlignment.TOP, 0)
			canvasWatermark1.Close()
			Dim over As New PdfCanvas(pdfDoc.GetFirstPage())
			over.SetFillColor(ColorConstants.BLACK)
			paragraph = (New Paragraph("This watermark is added ON TOP OF the existing content")).SetFont(font).SetFontSize(15)

			Dim canvasWatermark2 As Canvas = (New Canvas(over, pdfDoc.GetDefaultPageSize())).ShowTextAligned(paragraph, 297, 500, 1, TextAlignment.CENTER, VerticalAlignment.TOP, 0)
			canvasWatermark2.Close()
			paragraph = (New Paragraph("This TRANSPARENT watermark is added ON TOP OF the existing content")).SetFont(font).SetFontSize(15)
			over.SaveState()

			' Creating a dictionary that maps resource names to graphics state parameter dictionaries
			Dim gs1 As New PdfExtGState()
			gs1.SetFillOpacity(0.5F)
			over.SetExtGState(gs1)
			Dim canvasWatermark3 As Canvas = (New Canvas(over, pdfDoc.GetDefaultPageSize())).ShowTextAligned(paragraph, 297, 450, 1, TextAlignment.CENTER, VerticalAlignment.TOP, 0)
			canvasWatermark3.Close()
			over.RestoreState()

			pdfDoc.Close()
		End Sub
End Class

using IronPdf;
using IronPdf.Editing;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");

// Create text stamper
TextStamper textStamper = new TextStamper()
{
    Text = "Text Stamper!",
    FontFamily = "Bungee Spice",
    UseGoogleFont = true,
    FontSize = 30,
    IsBold = true,
    IsItalic = true,
    VerticalAlignment = VerticalAlignment.Top,
};

// Stamp the text stamper
pdf.ApplyStamp(textStamper);
pdf.SaveAs("stampText.pdf");

// Create image stamper
ImageStamper imageStamper = new ImageStamper(new Uri("https://ironpdf.com/img/svgs/iron-pdf-logo.svg"))
{
    VerticalAlignment = VerticalAlignment.Top,
};

// Stamp the image stamper
pdf.ApplyStamp(imageStamper, 0);
pdf.SaveAs("stampImage.pdf");

Imports IronPdf
Imports IronPdf.Editing

Private renderer As New ChromePdfRenderer()

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")

' Create text stamper
Private textStamper As New TextStamper() With {
	.Text = "Text Stamper!",
	.FontFamily = "Bungee Spice",
	.UseGoogleFont = True,
	.FontSize = 30,
	.IsBold = True,
	.IsItalic = True,
	.VerticalAlignment = VerticalAlignment.Top
}

' Stamp the text stamper
pdf.ApplyStamp(textStamper)
pdf.SaveAs("stampText.pdf")

' Create image stamper
Dim imageStamper As New ImageStamper(New Uri("https://ironpdf.com/img/svgs/iron-pdf-logo.svg")) With {.VerticalAlignment = VerticalAlignment.Top}

' Stamp the image stamper
pdf.ApplyStamp(imageStamper, 0)
pdf.SaveAs("stampImage.pdf")

using iText.Kernel.Pdf;
using iText.Layout;
using iText.Layout.Element;

public void StampPDF(string inputPdfPath, string outputPdfPath, string stampText)
{
    PdfDocument pdfDoc = new PdfDocument(new PdfReader(inputPdfPath), new PdfWriter(outputPdfPath));

    Document doc = new Document(pdfDoc);

    // Add stamp (text) to each page
    int numPages = pdfDoc.GetNumberOfPages();
    for (int i = 1; i <= numPages; i++)
    {
        doc.ShowTextAligned(new Paragraph(stampText),
                            36, 36, i, iText.Layout.Properties.TextAlignment.LEFT,
                            iText.Layout.Properties.VerticalAlignment.TOP, 0);
    }

    doc.Close();
}

Imports iText.Kernel.Pdf
Imports iText.Layout
Imports iText.Layout.Element

Public Sub StampPDF(ByVal inputPdfPath As String, ByVal outputPdfPath As String, ByVal stampText As String)
	Dim pdfDoc As New PdfDocument(New PdfReader(inputPdfPath), New PdfWriter(outputPdfPath))

	Dim doc As New Document(pdfDoc)

	' Add stamp (text) to each page
	Dim numPages As Integer = pdfDoc.GetNumberOfPages()
	For i As Integer = 1 To numPages
		doc.ShowTextAligned(New Paragraph(stampText), 36, 36, i, iText.Layout.Properties.TextAlignment.LEFT, iText.Layout.Properties.VerticalAlignment.TOP, 0)
	Next i

	doc.Close()
End Sub

using IronPdf;

// Instantiate Renderer
DocxToPdfRenderer renderer = new DocxToPdfRenderer();

// Render from DOCX file
PdfDocument pdf = renderer.RenderDocxAsPdf("Modern-chronological-resume.docx");

// Save the PDF
pdf.SaveAs("pdfFromDocx.pdf");

Imports IronPdf

' Instantiate Renderer
Private renderer As New DocxToPdfRenderer()

' Render from DOCX file
Private pdf As PdfDocument = renderer.RenderDocxAsPdf("Modern-chronological-resume.docx")

' Save the PDF
pdf.SaveAs("pdfFromDocx.pdf")