.NET 中的 NuGet PDF 生成器（开发者教程）

    using IronPdf;

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

    // Create a PDF from a 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 a 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 html_a = @" [PDF_A] 
             [PDF_A] 1st Page 

             [PDF_A] 2nd Page";

    var html_b = @" [PDF_B] 
             [PDF_B] 1st Page 

             [PDF_B] 2nd Page";

    var renderer = new ChromePdfRenderer();

    var pdfdoc_a = renderer.RenderHtmlAsPdf(html_a);
    var pdfdoc_b = renderer.RenderHtmlAsPdf(html_b);
    var merged = PdfDocument.Merge(pdfdoc_a, pdfdoc_b);

    merged.SaveAs("Merged.pdf");

Imports IronPdf

	Private html_a = " [PDF_A] 
             [PDF_A] 1st Page 

             [PDF_A] 2nd Page"

	Private html_b = " [PDF_B] 
             [PDF_B] 1st Page 

             [PDF_B] 2nd Page"

	Private renderer = New ChromePdfRenderer()

	Private pdfdoc_a = renderer.RenderHtmlAsPdf(html_a)
	Private pdfdoc_b = renderer.RenderHtmlAsPdf(html_b)
	Private merged = PdfDocument.Merge(pdfdoc_a, pdfdoc_b)

	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 = @"

            Editable PDF  Form

                First name:   
                Last name:   

                Please specify your gender:

                Female 

                Male 

                Non-Binary / Other

                Please select all medical conditions that apply:

                Hypertension

                Heart Disease

                Stoke

                Diabetes

                Kidney Disease
    ";

// 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.GetFieldByName("firstname");
FirstNameField.Value = "Minnie";
Console.WriteLine("FirstNameField value: {0}", FirstNameField.Value);

// Set and Read the value of the "lastname" field
IronPdf.Forms.FormField LastNameField = FormDocument.Form.GetFieldByName("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 = "

            Editable PDF  Form

                First name:   
                Last name:   

                Please specify your gender:

                Female 

                Male 

                Non-Binary / Other

                Please select all medical conditions that apply:

                Hypertension

                Heart Disease

                Stoke

                Diabetes

                Kidney Disease
    "

' 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.GetFieldByName("firstname")
FirstNameField.Value = "Minnie"
Console.WriteLine("FirstNameField value: {0}", FirstNameField.Value)

' Set and Read the value of the "lastname" field
Dim LastNameField As IronPdf.Forms.FormField = FormDocument.Form.GetFieldByName("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")