IronPDF与SelectPDF的对比

<table>
  <thead>
    <tr>
      <th>功能</th>
      <th>IronPDF 代码示例</th>
      <th>SelectPdf 代码示例</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Pdf 转换</td>
      <td>
        <pre><code class="language-csharp">
            var Renderer = new IronPdf.ChromePdfRenderer();
            var PDFDocument = Renderer.RenderHtmlAsPdf("&lt;h1&gt;Hello, World!&lt;/h1&gt;");
            PDFDocument.SaveAs("HtmlToPdf.pdf");
        </code></pre>
      </td>
      <td>
        <pre><code class="language-csharp">
            var converter = new HtmlToPdf();
            var doc = converter.ConvertHtmlString("&lt;h1&gt;Hello, World!&lt;/h1&gt;");
            doc.Save("HtmlToPdf.pdf");
        </code></pre>
      </td>
    </tr>
    <tr>
      <td>添加水印</td>
      <td>
        <pre><code class="language-csharp">
            var PDFDocument = PdfDocument.FromFile("example.pdf");
            var StampedPdf = PDFDocument.StampPDF("Confidential", PageNumbering.Normal, FontSize: 50, opacity: 50);
            StampedPdf.SaveAs("Watermarked.pdf");
        </code></pre>
      </td>
      <td>
        <pre><code class="language-csharp">
            var doc = new PdfDocument();
            var watermark = new PdfTextSection(10, 10, "Confidential", new Font("Arial", 50));
            watermark.Opacity = 0.5;
            doc.Add(watermark);
            doc.Save("Watermarked.pdf");
        </code></pre>
      </td>
    </tr>
  </tbody>
</table>

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>");

// Export to a file or Stream
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");

IRON VB CONVERTER ERROR developers@ironsoftware.com

// instantiate an HTML to PDF converter object
HtmlToPdf converter = new HtmlToPdf();

// create a new pdf document converting an url
PdfDocument doc = converter.ConvertUrl(url);

// save pdf document
doc.Save(file);

// close pdf document
doc.Close();

IRON VB CONVERTER ERROR developers@ironsoftware.com

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")

// set document passwords
doc.Security.OwnerPassword = "test1";
doc.Security.UserPassword = "test2";

//set document permissions
doc.Security.CanAssembleDocument = false;
doc.Security.CanCopyContent = true;
doc.Security.CanEditAnnotations = true;
doc.Security.CanEditContent = true;
doc.Security.CanFillFormFields = true;
doc.Security.CanPrint = true;

' set document passwords
doc.Security.OwnerPassword = "test1"
doc.Security.UserPassword = "test2"

'set document permissions
doc.Security.CanAssembleDocument = False
doc.Security.CanCopyContent = True
doc.Security.CanEditAnnotations = True
doc.Security.CanEditContent = True
doc.Security.CanFillFormFields = True
doc.Security.CanPrint = True

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

ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>foo</h1>");

// 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
pdf.Sign(sig);
pdf.SaveAs("signed.pdf");

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

Private renderer As New ChromePdfRenderer()
Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>foo</h1>")

' 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
pdf.Sign(sig)
pdf.SaveAs("signed.pdf")

// create a new pdf document
PdfDocument doc = new PdfDocument();

// add a new page to the document
PdfPage page = doc.AddPage();

// get image path 
// the image will be used to display the digital signature over it
string imgFile = Server.MapPath("~/files/logo.png");

// get certificate path
string certFile = Server.MapPath("~/files/selectpdf.pfx");

// define a rendering result object
PdfRenderingResult result;

// create image element from file path 
PdfImageElement img = new PdfImageElement(0, 0, imgFile);
result = page.Add(img);

// get the #PKCS12 certificate from file
PdfDigitalCertificatesCollection certificates =
    PdfDigitalCertificatesStore.GetCertificates(certFile, "selectpdf");
PdfDigitalCertificate certificate = certificates[0];

// create the digital signature object
PdfDigitalSignatureElement signature =
    new PdfDigitalSignatureElement(result.PdfPageLastRectangle, certificate);
signature.Reason = "SelectPdf";
signature.ContactInfo = "SelectPdf";
signature.Location = "SelectPdf";
page.Add(signature);

// save pdf document
doc.Save(Response, false, "Sample.pdf");

// close pdf document
doc.Close();

' create a new pdf document
Dim doc As New PdfDocument()

' add a new page to the document
Dim page As PdfPage = doc.AddPage()

' get image path 
' the image will be used to display the digital signature over it
Dim imgFile As String = Server.MapPath("~/files/logo.png")

' get certificate path
Dim certFile As String = Server.MapPath("~/files/selectpdf.pfx")

' define a rendering result object
Dim result As PdfRenderingResult

' create image element from file path 
Dim img As New PdfImageElement(0, 0, imgFile)
result = page.Add(img)

' get the #PKCS12 certificate from file
Dim certificates As PdfDigitalCertificatesCollection = PdfDigitalCertificatesStore.GetCertificates(certFile, "selectpdf")
Dim certificate As PdfDigitalCertificate = certificates(0)

' create the digital signature object
Dim signature As New PdfDigitalSignatureElement(result.PdfPageLastRectangle, certificate)
signature.Reason = "SelectPdf"
signature.ContactInfo = "SelectPdf"
signature.Location = "SelectPdf"
page.Add(signature)

' save pdf document
doc.Save(Response, False, "Sample.pdf")

' close pdf document
doc.Close()

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")

// create a new pdf document
PdfDocument doc = new PdfDocument();

// create a new pdf font
PdfFont font = doc.AddFont(PdfStandardFont.Helvetica);
font.Size = 24;

// add a new page to the document
PdfPage page = doc.AddPage();

// create a new text element and add it to the page
PdfTextElement text = new PdfTextElement(0, 0, Helper.SomeLongText(), font);
page.Add(text);

// get image path
string imgFile = Server.MapPath("~/files/logo.png");

// watermark all pages - add a template containing an image 
// to the bottom right of the page
// the image should repeat on all pdf pages automatically
// the template should be rendered behind the rest of the page elements
PdfTemplate template = doc.AddTemplate(doc.Pages[0].ClientRectangle);
PdfImageElement img = new PdfImageElement(
    doc.Pages[0].ClientRectangle.Width - 300,
    doc.Pages[0].ClientRectangle.Height - 150, imgFile);
img.Transparency = 50;
template.Background = true;
template.Add(img);

// save pdf document
doc.Save(Response, false, "Sample.pdf");

// close pdf document
doc.Close();

' create a new pdf document
Dim doc As New PdfDocument()

' create a new pdf font
Dim font As PdfFont = doc.AddFont(PdfStandardFont.Helvetica)
font.Size = 24

' add a new page to the document
Dim page As PdfPage = doc.AddPage()

' create a new text element and add it to the page
Dim text As New PdfTextElement(0, 0, Helper.SomeLongText(), font)
page.Add(text)

' get image path
Dim imgFile As String = Server.MapPath("~/files/logo.png")

' watermark all pages - add a template containing an image 
' to the bottom right of the page
' the image should repeat on all pdf pages automatically
' the template should be rendered behind the rest of the page elements
Dim template As PdfTemplate = doc.AddTemplate(doc.Pages(0).ClientRectangle)
Dim img As New PdfImageElement(doc.Pages(0).ClientRectangle.Width - 300, doc.Pages(0).ClientRectangle.Height - 150, imgFile)
img.Transparency = 50
template.Background = True
template.Add(img)

' save pdf document
doc.Save(Response, False, "Sample.pdf")

' close pdf document
doc.Close()

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("/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("/img/svgs/iron-pdf-logo.svg")) With {.VerticalAlignment = VerticalAlignment.Top}

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

// create a new pdf document
PdfDocument doc = new PdfDocument();

// create a new pdf font
PdfFont font = doc.AddFont(PdfStandardFont.Helvetica);
font.Size = 24;

// add a new page to the document
PdfPage page = doc.AddPage();

// create a new text element and add it to the page
PdfTextElement text = new PdfTextElement(0, 0, Helper.SomeLongText(), font);
page.Add(text);

// get image path
string imgFile = Server.MapPath("~/files/logo.png");

// stamp all pages - add a template containing an image to the bottom right of 
// the page the image should repeat on all pdf pages automatically
PdfTemplate template = doc.AddTemplate(doc.Pages[0].ClientRectangle);
PdfImageElement img = new PdfImageElement(
    doc.Pages[0].ClientRectangle.Width - 300,
    doc.Pages[0].ClientRectangle.Height - 150, imgFile);
template.Add(img);

// save pdf document
doc.Save(Response, false, "Sample.pdf");

// close pdf document
doc.Close();

' create a new pdf document
Dim doc As New PdfDocument()

' create a new pdf font
Dim font As PdfFont = doc.AddFont(PdfStandardFont.Helvetica)
font.Size = 24

' add a new page to the document
Dim page As PdfPage = doc.AddPage()

' create a new text element and add it to the page
Dim text As New PdfTextElement(0, 0, Helper.SomeLongText(), font)
page.Add(text)

' get image path
Dim imgFile As String = Server.MapPath("~/files/logo.png")

' stamp all pages - add a template containing an image to the bottom right of 
' the page the image should repeat on all pdf pages automatically
Dim template As PdfTemplate = doc.AddTemplate(doc.Pages(0).ClientRectangle)
Dim img As New PdfImageElement(doc.Pages(0).ClientRectangle.Width - 300, doc.Pages(0).ClientRectangle.Height - 150, imgFile)
template.Add(img)

' save pdf document
doc.Save(Response, False, "Sample.pdf")

' close pdf document
doc.Close()

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")