NuGet PDF 生成器在 .NET 中（開發者教程）

using IronPdf;

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

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

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

Imports IronPdf

' Instantiate Renderer
Private renderer = New ChromePdfRenderer()

' Create a PDF from an HTML string using C#
Private pdf = renderer.RenderHtmlAsPdf("Hello World")

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

using IronPdf;

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

// Create a PDF from a URL or local file path
var pdf = renderer.RenderUrlAsPdf("https://ironpdf.com/");

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

Imports IronPdf

' Instantiate Renderer
Private renderer = New ChromePdfRenderer()

' Create a PDF from a URL or local file path
Private pdf = renderer.RenderUrlAsPdf("https://ironpdf.com/")

' Export to a file or Stream
pdf.SaveAs("url.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("SAMPLE", 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("SAMPLE", 30, IronPdf.Editing.VerticalAlignment.Middle, IronPdf.Editing.HorizontalAlignment.Center)
pdf.SaveAs("C:\Path\To\Watermarked.pdf")

using IronPdf;

var htmlA = @"<h1>[PDF_A]</h1><p>[PDF_A] 1st Page</p><p>[PDF_A] 2nd Page</p>";
var htmlB = @"<h1>[PDF_B]</h1><p>[PDF_B] 1st Page</p><p>[PDF_B] 2nd Page</p>";

var renderer = new ChromePdfRenderer();

var pdfDocA = renderer.RenderHtmlAsPdf(htmlA);
var pdfDocB = renderer.RenderHtmlAsPdf(htmlB);
var merged = PdfDocument.Merge(pdfDocA, pdfDocB);

merged.SaveAs("Merged.pdf");

Imports IronPdf

Private htmlA = "<h1>[PDF_A]</h1><p>[PDF_A] 1st Page</p><p>[PDF_A] 2nd Page</p>"
Private htmlB = "<h1>[PDF_B]</h1><p>[PDF_B] 1st Page</p><p>[PDF_B] 2nd Page</p>"

Private renderer = New ChromePdfRenderer()

Private pdfDocA = renderer.RenderHtmlAsPdf(htmlA)
Private pdfDocB = renderer.RenderHtmlAsPdf(htmlB)
Private merged = PdfDocument.Merge(pdfDocA, pdfDocB)

merged.SaveAs("Merged.pdf")

using IronPdf;
using System;

// Step 1. Creating a PDF with editable forms from HTML using form and input tags
// Radio Button and Checkbox can also be implemented with input type 'radio' and 'checkbox'
const string formHtml = @"
    <h1>Editable PDF Form</h1>
    <label>First name: <input type='text' name='firstname' /></label>
    <label>Last name: <input type='text' name='lastname' /></label>
    <p>Please specify your gender:</p>
    <label><input type='radio' name='gender' value='female' /> Female</label>
    <label><input type='radio' name='gender' value='male' /> Male</label>
    <label><input type='radio' name='gender' value='other' /> Non-Binary / Other</label>
    <p>Please select all medical conditions that apply:</p>
    <label><input type='checkbox' name='condition' value='hypertension' /> Hypertension</label>
    <label><input type='checkbox' name='condition' value='heartDisease' /> Heart Disease</label>
    <label><input type='checkbox' name='condition' value='stroke' /> Stroke</label>
    <label><input type='checkbox' name='condition' value='diabetes' /> Diabetes</label>
    <label><input type='checkbox' name='condition' value='kidneyDisease' /> Kidney Disease</label>
";

// Instantiate Renderer
var renderer = new ChromePdfRenderer();
renderer.RenderingOptions.CreatePdfFormsFromHtml = true;
renderer.RenderHtmlAsPdf(formHtml).SaveAs("BasicForm.pdf");

// Step 2. Reading and Writing PDF form values.
var formDocument = PdfDocument.FromFile("BasicForm.pdf");

// Set and Read the value of the "firstname" field
var firstNameField = formDocument.Form.FindFormField("firstname");
firstNameField.Value = "Minnie";
Console.WriteLine("FirstNameField value: {0}", firstNameField.Value);

// Set and Read the value of the "lastname" field
var lastNameField = formDocument.Form.FindFormField("lastname");
lastNameField.Value = "Mouse";
Console.WriteLine("LastNameField value: {0}", lastNameField.Value);

formDocument.SaveAs("FilledForm.pdf");

Imports IronPdf
Imports System

' Step 1. Creating a PDF with editable forms from HTML using form and input tags
' Radio Button and Checkbox can also be implemented with input type 'radio' and 'checkbox'
Private Const formHtml As String = "
    <h1>Editable PDF Form</h1>
    <label>First name: <input type='text' name='firstname' /></label>
    <label>Last name: <input type='text' name='lastname' /></label>
    <p>Please specify your gender:</p>
    <label><input type='radio' name='gender' value='female' /> Female</label>
    <label><input type='radio' name='gender' value='male' /> Male</label>
    <label><input type='radio' name='gender' value='other' /> Non-Binary / Other</label>
    <p>Please select all medical conditions that apply:</p>
    <label><input type='checkbox' name='condition' value='hypertension' /> Hypertension</label>
    <label><input type='checkbox' name='condition' value='heartDisease' /> Heart Disease</label>
    <label><input type='checkbox' name='condition' value='stroke' /> Stroke</label>
    <label><input type='checkbox' name='condition' value='diabetes' /> Diabetes</label>
    <label><input type='checkbox' name='condition' value='kidneyDisease' /> Kidney Disease</label>
"

' Instantiate Renderer
Private renderer = New ChromePdfRenderer()
renderer.RenderingOptions.CreatePdfFormsFromHtml = True
renderer.RenderHtmlAsPdf(formHtml).SaveAs("BasicForm.pdf")

' Step 2. Reading and Writing PDF form values.
Dim formDocument = PdfDocument.FromFile("BasicForm.pdf")

' Set and Read the value of the "firstname" field
Dim firstNameField = formDocument.Form.FindFormField("firstname")
firstNameField.Value = "Minnie"
Console.WriteLine("FirstNameField value: {0}", firstNameField.Value)

' Set and Read the value of the "lastname" field
Dim lastNameField = formDocument.Form.FindFormField("lastname")
lastNameField.Value = "Mouse"
Console.WriteLine("LastNameField value: {0}", lastNameField.Value)

formDocument.SaveAs("FilledForm.pdf")

using IronPdf;

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

//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;

//Change or set the document encryption password
pdf.SecuritySettings.OwnerPassword = "top-secret"; // password to edit the pdf
pdf.SaveAs("secured.pdf");

Imports IronPdf

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

'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

'Change or set the document encryption password
pdf.SecuritySettings.OwnerPassword = "top-secret" ' password to edit the pdf
pdf.SaveAs("secured.pdf")