PDFSharp HTML 到 PDF 示例和教程比较

using IronPdf;

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

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

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

// Export to a file or Stream
pdf.SaveAs("output.pdf");

// Advanced Example with HTML Assets
// Load external html assets: images, CSS and JavaScript.
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 a HTML string using C#
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>")

' Export to a file or Stream
pdf.SaveAs("output.pdf")

' Advanced Example with HTML Assets
' Load external html assets: images, CSS and JavaScript.
Dim myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", "C:\site\assets\")
myAdvancedPdf.SaveAs("html-with-assets.pdf")

using System.IO;
using PdfSharp.Pdf;
using TheArtOfDev.HtmlRenderer.PdfSharp;

static void Main(string[] args)
{
    string html = @"<h1>Hello World</h1>";
    PdfDocument pdf = PdfGenerator.GeneratePdf(html, PageSize.A4);
    const string filename = "HtmlToPdfExample.pdf";
    pdf.Save(filename);
}

Imports System.IO
Imports PdfSharp.Pdf
Imports TheArtOfDev.HtmlRenderer.PdfSharp

Shared Sub Main(ByVal args() As String)
	Dim html As String = "<h1>Hello World</h1>"
	Dim pdf As PdfDocument = PdfGenerator.GeneratePdf(html, PageSize.A4)
	Const filename As String = "HtmlToPdfExample.pdf"
	pdf.Save(filename)
End Sub

using IronPdf;

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

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

pdf.SaveAs("redacted.pdf");

Imports IronPdf

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

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

pdf.SaveAs("redacted.pdf")

using System;
using PdfSharp.Pdf;
using PdfSharp.Drawing;

namespace PdfRedactionExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // Load an existing PDF document
            PdfDocument document = PdfReader.Open("input.pdf", PdfDocumentOpenMode.Modify);
            // Get the first page of the document
            PdfPage page = document.Pages[0];
            // Create a graphics object to write on the page
            XGraphics gfx = XGraphics.FromPdfPage(page);
            // Define the area to redact (for example, a rectangle covering text)
            XRect redactRect = new XRect(100, 100, 200, 50); // Adjust coordinates and size as needed
            // Fill the redaction area with a black rectangle
            gfx.DrawRectangle(XBrushes.Black, redactRect);
            // Save the modified document
            document.Save("output.pdf");
            // Optionally, close the document
            document.Close();
        }
    }
}

Imports System
Imports PdfSharp.Pdf
Imports PdfSharp.Drawing

Namespace PdfRedactionExample
	Friend Class Program
		Shared Sub Main(ByVal args() As String)
			' Load an existing PDF document
			Dim document As PdfDocument = PdfReader.Open("input.pdf", PdfDocumentOpenMode.Modify)
			' Get the first page of the document
			Dim page As PdfPage = document.Pages(0)
			' Create a graphics object to write on the page
			Dim gfx As XGraphics = XGraphics.FromPdfPage(page)
			' Define the area to redact (for example, a rectangle covering text)
			Dim redactRect As New XRect(100, 100, 200, 50) ' Adjust coordinates and size as needed
			' Fill the redaction area with a black rectangle
			gfx.DrawRectangle(XBrushes.Black, redactRect)
			' Save the modified document
			document.Save("output.pdf")
			' Optionally, close the document
			document.Close()
		End Sub
	End Class
End Namespace

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 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 PdfSharp.Pdf;
using PdfSharp.Drawing;

PdfDocument document = PdfReader.Open("Input.pdf", PdfDocumentOpenMode.Modify);
XGraphics gfx = XGraphics.FromPdfPage(document.Pages[0]);
XFont font = new XFont("Verdana", 40, XFontStyle.BoldItalic);
XBrush brush = new XSolidBrush(XColor.FromArgb(128, 255, 0, 0));
string watermarkText = "SAMPLE";
XSize textSize = gfx.MeasureString(watermarkText, font);
XPoint center = new XPoint((document.Pages[0].Width - textSize.Width) / 2, (document.Pages[0].Height - textSize.Height) / 2);
gfx.DrawString(watermarkText, font, brush, center, XStringFormats.Center);

// Save the document
document.Save("Watermarked.pdf");

Imports PdfSharp.Pdf
Imports PdfSharp.Drawing

Private document As PdfDocument = PdfReader.Open("Input.pdf", PdfDocumentOpenMode.Modify)
Private gfx As XGraphics = XGraphics.FromPdfPage(document.Pages(0))
Private font As New XFont("Verdana", 40, XFontStyle.BoldItalic)
Private brush As XBrush = New XSolidBrush(XColor.FromArgb(128, 255, 0, 0))
Private watermarkText As String = "SAMPLE"
Private textSize As XSize = gfx.MeasureString(watermarkText, font)
Private center As New XPoint((document.Pages(0).Width - textSize.Width) \ 2, (document.Pages(0).Height - textSize.Height) \ 2)
gfx.DrawString(watermarkText, font, brush, center, XStringFormats.Center)

' Save the document
document.Save("Watermarked.pdf")

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")

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 PdfSharp.Drawing;
using PdfSharp.Pdf;
using System.Drawing;

// Load an existing PDF document
PdfDocument document = PdfReader.Open("Input.pdf", PdfDocumentOpenMode.Modify);
// Iterate through each page in the document
 foreach (PdfPage page in document.Pages)
 {
    // Get an XGraphics object for drawing on the page
    XGraphics gfx = XGraphics.FromPdfPage(page);

    // Define a font and brush for stamping text
    XFont font = new XFont("Arial", 12);
    XBrush brush = XBrushes.Red;

     // Stamp text onto the page
     gfx.DrawString("Confidential", font, brush, 50, 50);

     // Stamp an image onto the page
     XImage image = XImage.FromFile("stamp.png"); // Replace with your image path
     gfx.DrawImage(image, 100, 100, image.PixelWidth / 2, image.PixelHeight / 2);
}

document.Save("StampedOutput.pdf");

Imports PdfSharp.Drawing
Imports PdfSharp.Pdf
Imports System.Drawing

' Load an existing PDF document
Private document As PdfDocument = PdfReader.Open("Input.pdf", PdfDocumentOpenMode.Modify)
' Iterate through each page in the document
 For Each page As PdfPage In document.Pages
	' Get an XGraphics object for drawing on the page
	Dim gfx As XGraphics = XGraphics.FromPdfPage(page)

	' Define a font and brush for stamping text
	Dim font As New XFont("Arial", 12)
	Dim brush As XBrush = XBrushes.Red

	 ' Stamp text onto the page
	 gfx.DrawString("Confidential", font, brush, 50, 50)

	 ' Stamp an image onto the page
	 Dim image As XImage = XImage.FromFile("stamp.png") ' Replace with your image path
'INSTANT VB WARNING: Instant VB cannot determine whether both operands of this division are integer types - if they are then you should use the VB integer division operator:
	 gfx.DrawImage(image, 100, 100, image.PixelWidth / 2, image.PixelHeight / 2)
 Next page

document.Save("StampedOutput.pdf")

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 PdfSharp.Pdf;
using PdfSharp.Pdf.IO;
using PdfSharp.Pdf.Security;

PdfDocument document = PdfReader.Open("Input.pdf", PdfDocumentOpenMode.Modify);
string userPassword = "userpassword";
string ownerPassword = "ownerpassword";

PdfSecuritySettings securitySettings = document.SecuritySettings;
securitySettings.DocumentSecurityLevel = PdfDocumentSecurityLevel.Encrypted128Bit;
securitySettings.UserPassword = userPassword;
securitySettings.OwnerPassword = ownerPassword;
securitySettings.PermitAccessibilityExtractContent = false;
securitySettings.PermitAnnotationsAndFieldsEdit = false;
securitySettings.PermitAssembleDocument = false;
securitySettings.PermitExtractContent = false;
securitySettings.PermitFormsFill = true;
securitySettings.PermitFullQualityPrint = true;
securitySettings.PermitModifyDocument = true;
securitySettings.PermitPrint = true;

document.Save("EncryptedOutput.pdf");

Imports PdfSharp.Pdf
Imports PdfSharp.Pdf.IO
Imports PdfSharp.Pdf.Security

Private document As PdfDocument = PdfReader.Open("Input.pdf", PdfDocumentOpenMode.Modify)
Private userPassword As String = "userpassword"
Private ownerPassword As String = "ownerpassword"

Private securitySettings As PdfSecuritySettings = document.SecuritySettings
securitySettings.DocumentSecurityLevel = PdfDocumentSecurityLevel.Encrypted128Bit
securitySettings.UserPassword = userPassword
securitySettings.OwnerPassword = ownerPassword
securitySettings.PermitAccessibilityExtractContent = False
securitySettings.PermitAnnotationsAndFieldsEdit = False
securitySettings.PermitAssembleDocument = False
securitySettings.PermitExtractContent = False
securitySettings.PermitFormsFill = True
securitySettings.PermitFullQualityPrint = True
securitySettings.PermitModifyDocument = True
securitySettings.PermitPrint = True

document.Save("EncryptedOutput.pdf")