Cómo convertir HTML a PDF en C# (Guía del desarrollador)

Imports IronPdf

IronPdf.License.LicenseKey = "KEY"

Imports IronPdf

IronPdf.License.LicenseKey = "KEY"

Imports IronPdf

' Create the Chrome renderer
Dim renderer As New ChromePdfRenderer()

' Convert HTML string to PDF
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Hello IronPdf</h1>")

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

Imports IronPdf

' Create the Chrome renderer
Dim renderer As New ChromePdfRenderer()

' Convert HTML string to PDF
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Hello IronPdf</h1>")

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

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Convert HTML content with local image and CSS references
Dim html As String = "
    <link rel='stylesheet' href='styles.css'>
    <img src='logo.png' alt='Company Logo'>
    <h1>Company Report</h1>
    <p>Annual report content...</p>"

' Set base path for resolving relative URLs in HTML to PDF conversion
Dim pdf = renderer.RenderHtmlAsPdf(html, "C:\MyProject\Assets\")
pdf.SaveAs("report.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Convert HTML content with local image and CSS references
Dim html As String = "
    <link rel='stylesheet' href='styles.css'>
    <img src='logo.png' alt='Company Logo'>
    <h1>Company Report</h1>
    <p>Annual report content...</p>"

' Set base path for resolving relative URLs in HTML to PDF conversion
Dim pdf = renderer.RenderHtmlAsPdf(html, "C:\MyProject\Assets\")
pdf.SaveAs("report.pdf")

Imports IronPdf
Imports IronPdf.Rendering

' Initialize HTML to PDF converter
Dim renderer As New ChromePdfRenderer()

' Configure CSS media type for rendering specified URLs
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print

' Screen media type shows the entire web page as displayed on screen

Imports IronPdf
Imports IronPdf.Rendering

' Initialize HTML to PDF converter
Dim renderer As New ChromePdfRenderer()

' Configure CSS media type for rendering specified URLs
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print

' Screen media type shows the entire web page as displayed on screen

Imports IronPdf

' Configure JavaScript rendering for dynamic HTML content to PDF
Dim renderer As New ChromePdfRenderer()

' Enable JavaScript execution during PDF generation
renderer.RenderingOptions.EnableJavaScript = True

' WaitFor.RenderDelay pauses before capturing the HTML
renderer.RenderingOptions.WaitFor.RenderDelay = 500 ' milliseconds

Imports IronPdf

' Configure JavaScript rendering for dynamic HTML content to PDF
Dim renderer As New ChromePdfRenderer()

' Enable JavaScript execution during PDF generation
renderer.RenderingOptions.EnableJavaScript = True

' WaitFor.RenderDelay pauses before capturing the HTML
renderer.RenderingOptions.WaitFor.RenderDelay = 500 ' milliseconds

Imports IronPdf

' Create renderer for JavaScript-heavy HTML
Dim renderer As New ChromePdfRenderer()

' Convert d3.js visualization web page to PDF
Dim pdf = renderer.RenderUrlAsPdf("https://bl.ocks.org/mbostock/4062006")

' Save the interactive chart as static PDF
pdf.SaveAs("chart.pdf")

Imports IronPdf

' Create renderer for JavaScript-heavy HTML
Dim renderer As New ChromePdfRenderer()

' Convert d3.js visualization web page to PDF
Dim pdf = renderer.RenderUrlAsPdf("https://bl.ocks.org/mbostock/4062006")

' Save the interactive chart as static PDF
pdf.SaveAs("chart.pdf")

```vbnet
' Configure for optimal responsive design handling in HTML to PDF

renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print
```

```vbnet
' Configure for optimal responsive design handling in HTML to PDF

renderer.RenderingOptions.CssMediaType = IronPdf.Rendering.PdfCssMediaType.Print
```

Imports IronPdf

' Initialize ChromePdfRenderer for HTML file conversion
Dim renderer As New ChromePdfRenderer()

' Convert HTML file to PDF documents
' Preserves all relative paths and linked resources in HTML
Dim pdf = renderer.RenderHtmlFileAsPdf("Assets/TestInvoice1.html")

' Save the HTML file as PDF 
pdf.SaveAs("Invoice.pdf")

' All CSS, JavaScript, and images load correctly in the generated PDF

Imports IronPdf

' Initialize ChromePdfRenderer for HTML file conversion
Dim renderer As New ChromePdfRenderer()

' Convert HTML file to PDF documents
' Preserves all relative paths and linked resources in HTML
Dim pdf = renderer.RenderHtmlFileAsPdf("Assets/TestInvoice1.html")

' Save the HTML file as PDF 
pdf.SaveAs("Invoice.pdf")

' All CSS, JavaScript, and images load correctly in the generated PDF

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Render a Razor Page directly to PDF
Dim pdf As PdfDocument = renderer.RenderRazorToPdf(Me)

Response.Headers.Add("Content-Disposition", "inline")
Return New FileContentResult(pdf.BinaryData, "application/pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Render a Razor Page directly to PDF
Dim pdf As PdfDocument = renderer.RenderRazorToPdf(Me)

Response.Headers.Add("Content-Disposition", "inline")
Return New FileContentResult(pdf.BinaryData, "application/pdf")

Imports IronPdf.Extensions.Mvc.Core

Dim builder = WebApplication.CreateBuilder(args)
builder.Services.AddControllersWithViews()

' Register the Razor view renderer for IronPDF
builder.Services.AddSingleton(Of IHttpContextAccessor, HttpContextAccessor)()
builder.Services.AddSingleton(Of IRazorViewRenderer, RazorViewRenderer)()

Imports IronPdf.Extensions.Mvc.Core

Dim builder = WebApplication.CreateBuilder(args)
builder.Services.AddControllersWithViews()

' Register the Razor view renderer for IronPDF
builder.Services.AddSingleton(Of IHttpContextAccessor, HttpContextAccessor)()
builder.Services.AddSingleton(Of IRazorViewRenderer, RazorViewRenderer)()

Imports IronPdf
Imports IronPdf.Extensions.Mvc.Core

Dim renderer As New ChromePdfRenderer()

' Render an MVC View with model data to PDF
Dim pdf As PdfDocument = renderer.RenderRazorViewToPdf(_viewRenderService, "Views/Home/Report.cshtml", reportModel)

Response.Headers.Add("Content-Disposition", "inline")
Return New FileContentResult(pdf.BinaryData, "application/pdf")

Imports IronPdf
Imports IronPdf.Extensions.Mvc.Core

Dim renderer As New ChromePdfRenderer()

' Render an MVC View with model data to PDF
Dim pdf As PdfDocument = renderer.RenderRazorViewToPdf(_viewRenderService, "Views/Home/Report.cshtml", reportModel)

Response.Headers.Add("Content-Disposition", "inline")
Return New FileContentResult(pdf.BinaryData, "application/pdf")

Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports IronPdf

Namespace AspxToPdfTutorial
	Partial Public Class Invoice
		Inherits System.Web.UI.Page

		Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
			IronPdf.AspxToPdf.RenderThisPageAsPdf(IronPdf.AspxToPdf.FileBehavior.InBrowser)
		End Sub
	End Class
End Namespace

Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports IronPdf

Namespace AspxToPdfTutorial
	Partial Public Class Invoice
		Inherits System.Web.UI.Page

		Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
			IronPdf.AspxToPdf.RenderThisPageAsPdf(IronPdf.AspxToPdf.FileBehavior.InBrowser)
		End Sub
	End Class
End Namespace

Imports IronPdf.Extensions.Maui

Namespace mauiSample

	Partial Public Class MainPage
		Inherits ContentPage

		Public Sub New()
			InitializeComponent()
		End Sub

		Private Sub PrintToPdf(ByVal sender As Object, ByVal e As EventArgs)
			Dim renderer As New ChromePdfRenderer()

			' Apply HTML header
			renderer.RenderingOptions.HtmlHeader = New HtmlHeaderFooter() With {.HtmlFragment = "<h1>Header</h1>"}

			' Render PDF from Maui Page
			Dim pdf As PdfDocument = renderer.RenderContentPageToPdf(Of MainPage, App)().Result

			pdf.SaveAs("C:\Users\lyty1\Downloads\contentPageToPdf.pdf")
		End Sub
	End Class
End Namespace

Imports IronPdf.Extensions.Maui

Namespace mauiSample

	Partial Public Class MainPage
		Inherits ContentPage

		Public Sub New()
			InitializeComponent()
		End Sub

		Private Sub PrintToPdf(ByVal sender As Object, ByVal e As EventArgs)
			Dim renderer As New ChromePdfRenderer()

			' Apply HTML header
			renderer.RenderingOptions.HtmlHeader = New HtmlHeaderFooter() With {.HtmlFragment = "<h1>Header</h1>"}

			' Render PDF from Maui Page
			Dim pdf As PdfDocument = renderer.RenderContentPageToPdf(Of MainPage, App)().Result

			pdf.SaveAs("C:\Users\lyty1\Downloads\contentPageToPdf.pdf")
		End Sub
	End Class
End Namespace

Imports IronPdf

Private renderer As New ChromePdfRenderer()

renderer.RenderHtmlFileAsPdf("report.html").SaveAs("report.pdf")

Imports IronPdf

Private renderer As New ChromePdfRenderer()

renderer.RenderHtmlFileAsPdf("report.html").SaveAs("report.pdf")

code
If True Then

	' Model to bind user input
	private InputHTMLModel _InputMsgModel = New InputHTMLModel()

'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'	private async Task SubmitHTML()
'	{
'		' Set your IronPDF license key
'		IronPdf.License.LicenseKey = "IRONPDF-MYLICENSE-KEY-1EF01";
'
'		' Create a renderer to convert HTML to PDF
'		var render = New IronPdf.ChromePdfRenderer();
'
'		' Render the HTML input into a PDF document
'		var doc = render.RenderHtmlAsPdf(_InputMsgModel.HTML);
'
'		var fileName = "iron.pdf";
'
'		' Create a stream reference for the PDF content
'		var streamRef = New DotNetStreamReference(stream: doc.Stream);
'
'		' Invoke JavaScript function to download the PDF in the browser
'		await JS.InvokeVoidAsync("SubmitHTML", fileName, streamRef);
'	}

'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'	public class InputHTMLModel
'	{
'		public string HTML
'		{
'			get;
'			set;
'		} = "My new message";
'	}
End If

code
If True Then

	' Model to bind user input
	private InputHTMLModel _InputMsgModel = New InputHTMLModel()

'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'	private async Task SubmitHTML()
'	{
'		' Set your IronPDF license key
'		IronPdf.License.LicenseKey = "IRONPDF-MYLICENSE-KEY-1EF01";
'
'		' Create a renderer to convert HTML to PDF
'		var render = New IronPdf.ChromePdfRenderer();
'
'		' Render the HTML input into a PDF document
'		var doc = render.RenderHtmlAsPdf(_InputMsgModel.HTML);
'
'		var fileName = "iron.pdf";
'
'		' Create a stream reference for the PDF content
'		var streamRef = New DotNetStreamReference(stream: doc.Stream);
'
'		' Invoke JavaScript function to download the PDF in the browser
'		await JS.InvokeVoidAsync("SubmitHTML", fileName, streamRef);
'	}

'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'	public class InputHTMLModel
'	{
'		public string HTML
'		{
'			get;
'			set;
'		} = "My new message";
'	}
End If

<Parameter>
Public Property persons As IEnumerable(Of PersonInfo)
Public Property Parameters As Dictionary(Of String, Object) = New Dictionary(Of String, Object)()

Protected Overrides Async Function OnInitializedAsync() As Task
    persons = New List(Of PersonInfo) From {
        New PersonInfo With {.Name = "Alice", .Title = "Mrs.", .Description = "Software Engineer"},
        New PersonInfo With {.Name = "Bob", .Title = "Mr.", .Description = "Software Engineer"},
        New PersonInfo With {.Name = "Charlie", .Title = "Mr.", .Description = "Software Engineer"}
    }
End Function

Private Async Sub PrintToPdf()
    Dim renderer As New ChromePdfRenderer()

    ' Apply text footer
    renderer.RenderingOptions.TextFooter = New TextHeaderFooter() With {
        .LeftText = "{date} - {time}",
        .DrawDividerLine = True,
        .RightText = "Page {page} of {total-pages}",
        .Font = IronSoftware.Drawing.FontTypes.Arial,
        .FontSize = 11
    }

    Parameters.Add("persons", persons)

    ' Render razor component to PDF
    Dim pdf As PdfDocument = renderer.RenderRazorComponentToPdf(Of Person)(Parameters)

    File.WriteAllBytes("razorComponentToPdf.pdf", pdf.BinaryData)
End Sub

<Parameter>
Public Property persons As IEnumerable(Of PersonInfo)
Public Property Parameters As Dictionary(Of String, Object) = New Dictionary(Of String, Object)()

Protected Overrides Async Function OnInitializedAsync() As Task
    persons = New List(Of PersonInfo) From {
        New PersonInfo With {.Name = "Alice", .Title = "Mrs.", .Description = "Software Engineer"},
        New PersonInfo With {.Name = "Bob", .Title = "Mr.", .Description = "Software Engineer"},
        New PersonInfo With {.Name = "Charlie", .Title = "Mr.", .Description = "Software Engineer"}
    }
End Function

Private Async Sub PrintToPdf()
    Dim renderer As New ChromePdfRenderer()

    ' Apply text footer
    renderer.RenderingOptions.TextFooter = New TextHeaderFooter() With {
        .LeftText = "{date} - {time}",
        .DrawDividerLine = True,
        .RightText = "Page {page} of {total-pages}",
        .Font = IronSoftware.Drawing.FontTypes.Arial,
        .FontSize = 11
    }

    Parameters.Add("persons", persons)

    ' Render razor component to PDF
    Dim pdf As PdfDocument = renderer.RenderRazorComponentToPdf(Of Person)(Parameters)

    File.WriteAllBytes("razorComponentToPdf.pdf", pdf.BinaryData)
End Sub

Imports IronPdf.Razor.Pages

Public Function OnPostAsync() As IActionResult
    persons = New List(Of Person) From {
        New Person With {.Name = "Alice", .Title = "Mrs.", .Description = "Software Engineer"},
        New Person With {.Name = "Bob", .Title = "Mr.", .Description = "Software Engineer"},
        New Person With {.Name = "Charlie", .Title = "Mr.", .Description = "Software Engineer"}
    }

    ViewData("personList") = persons

    Dim renderer As New ChromePdfRenderer()

    ' Render Razor Page to PDF document
    Dim pdf As PdfDocument = renderer.RenderRazorToPdf(Me)

    Response.Headers.Add("Content-Disposition", "inline")

    Return File(pdf.BinaryData, "application/pdf", "razorPageToPdf.pdf")
End Function

Imports IronPdf.Razor.Pages

Public Function OnPostAsync() As IActionResult
    persons = New List(Of Person) From {
        New Person With {.Name = "Alice", .Title = "Mrs.", .Description = "Software Engineer"},
        New Person With {.Name = "Bob", .Title = "Mr.", .Description = "Software Engineer"},
        New Person With {.Name = "Charlie", .Title = "Mr.", .Description = "Software Engineer"}
    }

    ViewData("personList") = persons

    Dim renderer As New ChromePdfRenderer()

    ' Render Razor Page to PDF document
    Dim pdf As PdfDocument = renderer.RenderRazorToPdf(Me)

    Response.Headers.Add("Content-Disposition", "inline")

    Return File(pdf.BinaryData, "application/pdf", "razorPageToPdf.pdf")
End Function

Public Async Function Persons() As Task(Of IActionResult)
    Dim persons = New List(Of Person) From {
        New Person With {.Name = "Alice", .Title = "Mrs.", .Description = "Software Engineer"},
        New Person With {.Name = "Bob", .Title = "Mr.", .Description = "Software Engineer"},
        New Person With {.Name = "Charlie", .Title = "Mr.", .Description = "Software Engineer"}
    }
    If _httpContextAccessor.HttpContext.Request.Method = HttpMethod.Post.Method Then
        Dim renderer As New ChromePdfRenderer()

        ' Render View to PDF document
        Dim pdf As PdfDocument = renderer.RenderRazorViewToPdf(_viewRenderService, "Views/Home/Persons.cshtml", persons)
        Response.Headers.Add("Content-Disposition", "inline")

        ' Output PDF document
        Return File(pdf.BinaryData, "application/pdf", "viewToPdfMVCCore.pdf")
    End If
    Return View(persons)
End Function

Public Async Function Persons() As Task(Of IActionResult)
    Dim persons = New List(Of Person) From {
        New Person With {.Name = "Alice", .Title = "Mrs.", .Description = "Software Engineer"},
        New Person With {.Name = "Bob", .Title = "Mr.", .Description = "Software Engineer"},
        New Person With {.Name = "Charlie", .Title = "Mr.", .Description = "Software Engineer"}
    }
    If _httpContextAccessor.HttpContext.Request.Method = HttpMethod.Post.Method Then
        Dim renderer As New ChromePdfRenderer()

        ' Render View to PDF document
        Dim pdf As PdfDocument = renderer.RenderRazorViewToPdf(_viewRenderService, "Views/Home/Persons.cshtml", persons)
        Response.Headers.Add("Content-Disposition", "inline")

        ' Output PDF document
        Return File(pdf.BinaryData, "application/pdf", "viewToPdfMVCCore.pdf")
    End If
    Return View(persons)
End Function

Public Function Persons() As ActionResult
    Dim persons = New List(Of Person) From {
        New Person With {.Name = "Alice", .Title = "Mrs.", .Description = "Software Engineer"},
        New Person With {.Name = "Bob", .Title = "Mr.", .Description = "Software Engineer"},
        New Person With {.Name = "Charlie", .Title = "Mr.", .Description = "Software Engineer"}
    }
    
    If HttpContext.Request.HttpMethod = "POST" Then
        ' Provide the path to your view file
        Dim viewPath = "~/Views/Home/Persons.cshtml"
        Dim renderer As New ChromePdfRenderer()
        
        ' Render Razor view to PDF document
        Dim pdf As PdfDocument = renderer.RenderView(Me.HttpContext, viewPath, persons)
        Response.Headers.Add("Content-Disposition", "inline")
        
        ' View the PDF
        Return File(pdf.BinaryData, "application/pdf")
    End If
    
    Return View(persons)
End Function

Public Function Persons() As ActionResult
    Dim persons = New List(Of Person) From {
        New Person With {.Name = "Alice", .Title = "Mrs.", .Description = "Software Engineer"},
        New Person With {.Name = "Bob", .Title = "Mr.", .Description = "Software Engineer"},
        New Person With {.Name = "Charlie", .Title = "Mr.", .Description = "Software Engineer"}
    }
    
    If HttpContext.Request.HttpMethod = "POST" Then
        ' Provide the path to your view file
        Dim viewPath = "~/Views/Home/Persons.cshtml"
        Dim renderer As New ChromePdfRenderer()
        
        ' Render Razor view to PDF document
        Dim pdf As PdfDocument = renderer.RenderView(Me.HttpContext, viewPath, persons)
        Response.Headers.Add("Content-Disposition", "inline")
        
        ' View the PDF
        Return File(pdf.BinaryData, "application/pdf")
    End If
    
    Return View(persons)
End Function

Imports IronPdf
Imports Microsoft.AspNetCore.Http

app.MapGet("/PrintPdf", Async Function() As Task(Of IResult)
    ' Set your IronPDF license key
    IronPdf.License.LicenseKey = "IRONPDF-MYLICENSE-KEY-1EF01"

    ' Enable detailed logging for troubleshooting
    IronPdf.Logging.Logger.LoggingMode = IronPdf.Logging.Logger.LoggingModes.All

    ' Render the Razor view to an HTML string
    Dim html As String = Await RazorTemplateEngine.RenderAsync("Views/Home/Data.cshtml")

    ' Create a new instance of ChromePdfRenderer 
    Dim renderer As New ChromePdfRenderer()

    ' Render the HTML string as a PDF document
    Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf(html, "./wwwroot")

    ' Return the PDF file as a response
    Return Results.File(pdf.BinaryData, "application/pdf", "razorViewToPdf.pdf")
End Function)

Imports IronPdf
Imports Microsoft.AspNetCore.Http

app.MapGet("/PrintPdf", Async Function() As Task(Of IResult)
    ' Set your IronPDF license key
    IronPdf.License.LicenseKey = "IRONPDF-MYLICENSE-KEY-1EF01"

    ' Enable detailed logging for troubleshooting
    IronPdf.Logging.Logger.LoggingMode = IronPdf.Logging.Logger.LoggingModes.All

    ' Render the Razor view to an HTML string
    Dim html As String = Await RazorTemplateEngine.RenderAsync("Views/Home/Data.cshtml")

    ' Create a new instance of ChromePdfRenderer 
    Dim renderer As New ChromePdfRenderer()

    ' Render the HTML string as a PDF document
    Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf(html, "./wwwroot")

    ' Return the PDF file as a response
    Return Results.File(pdf.BinaryData, "application/pdf", "razorViewToPdf.pdf")
End Function)

Imports IronPdf
Imports IronPdf.Rendering

Dim renderer As New ChromePdfRenderer()

' Apply print-specific CSS rules
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print

' Set custom margins in millimeters
renderer.RenderingOptions.MarginTop = 50
renderer.RenderingOptions.MarginBottom = 50

' Enable background colors and images
renderer.RenderingOptions.PrintHtmlBackgrounds = True

' Set paper size and orientation
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4
renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Landscape

' Generate PDFs with all settings applied to HTML content
Dim htmlContent As String = "<div style='background-color: #f0f0f0; padding: 20px;'><h1>Styled Content</h1></div>"
Dim pdfDocument As PdfDocument = renderer.RenderHtmlAsPdf(htmlContent)
pdfDocument.SaveAs("styled-output.pdf")

Imports IronPdf
Imports IronPdf.Rendering

Dim renderer As New ChromePdfRenderer()

' Apply print-specific CSS rules
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print

' Set custom margins in millimeters
renderer.RenderingOptions.MarginTop = 50
renderer.RenderingOptions.MarginBottom = 50

' Enable background colors and images
renderer.RenderingOptions.PrintHtmlBackgrounds = True

' Set paper size and orientation
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4
renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Landscape

' Generate PDFs with all settings applied to HTML content
Dim htmlContent As String = "<div style='background-color: #f0f0f0; padding: 20px;'><h1>Styled Content</h1></div>"
Dim pdfDocument As PdfDocument = renderer.RenderHtmlAsPdf(htmlContent)
pdfDocument.SaveAs("styled-output.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Network authentication (Basic, Digest, NTLM)
renderer.LoginCredentials = New ChromeHttpLoginCredentials With {
    .NetworkUsername = "user@domain.com",
    .NetworkPassword = "securePassword"
}

' Session cookies for authenticated pages
renderer.RenderingOptions.CustomCookies("sessionId") = "abc123"

' Custom HTTP headers (e.g., Bearer tokens, API keys)
renderer.RenderingOptions.CustomHttpRequestHeaders("Authorization") = "Bearer eyJhbGciOi..."

Dim pdf = renderer.RenderUrlAsPdf("https://intranet.company.com/quarterly-report")
pdf.SaveAs("quarterly-report.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Network authentication (Basic, Digest, NTLM)
renderer.LoginCredentials = New ChromeHttpLoginCredentials With {
    .NetworkUsername = "user@domain.com",
    .NetworkPassword = "securePassword"
}

' Session cookies for authenticated pages
renderer.RenderingOptions.CustomCookies("sessionId") = "abc123"

' Custom HTTP headers (e.g., Bearer tokens, API keys)
renderer.RenderingOptions.CustomHttpRequestHeaders("Authorization") = "Bearer eyJhbGciOi..."

Dim pdf = renderer.RenderUrlAsPdf("https://intranet.company.com/quarterly-report")
pdf.SaveAs("quarterly-report.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Proxy is the third parameter — not a render option
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf(
    "<h1>Report</h1><link rel='stylesheet' href='https://cdn.example.com/styles.css'>",
    baseUrlOrPath:=Nothing,
    proxy:="http://proxy.corp.local:8080"
)
pdf.SaveAs("proxied-report.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Proxy is the third parameter — not a render option
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf(
    "<h1>Report</h1><link rel='stylesheet' href='https://cdn.example.com/styles.css'>",
    baseUrlOrPath:=Nothing,
    proxy:="http://proxy.corp.local:8080"
)
pdf.SaveAs("proxied-report.pdf")

' Simple HTML templating with String.Format
Dim htmlTemplate As String = String.Format("<h1>Hello {0}!</h1>", "World")

' Results in HTML content: <h1>Hello World!</h1>

' Simple HTML templating with String.Format
Dim htmlTemplate As String = String.Format("<h1>Hello {0}!</h1>", "World")

' Results in HTML content: <h1>Hello World!</h1>

' Define reusable HTML template for PDF files
Dim htmlTemplate As String = "<p>Dear [[NAME]],</p><p>Thank you for your order.</p>"

' Customer names for batch PDF conversion processing
Dim names As String() = {"John", "James", "Jenny"}

' Create personalized PDF documents for each customer
Dim renderer As New ChromePdfRenderer()

For Each name In names
    ' Replace placeholder with actual data in HTML string
    Dim htmlInstance As String = htmlTemplate.Replace("[[NAME]]", name)

    ' Generate personalized PDF document from HTML content
    Dim pdf = renderer.RenderHtmlAsPdf(htmlInstance)

    ' Save with customer-specific filename as PDF files
    pdf.SaveAs($"{name}-invoice.pdf")
Next

' Define reusable HTML template for PDF files
Dim htmlTemplate As String = "<p>Dear [[NAME]],</p><p>Thank you for your order.</p>"

' Customer names for batch PDF conversion processing
Dim names As String() = {"John", "James", "Jenny"}

' Create personalized PDF documents for each customer
Dim renderer As New ChromePdfRenderer()

For Each name In names
    ' Replace placeholder with actual data in HTML string
    Dim htmlInstance As String = htmlTemplate.Replace("[[NAME]]", name)

    ' Generate personalized PDF document from HTML content
    Dim pdf = renderer.RenderHtmlAsPdf(htmlInstance)

    ' Save with customer-specific filename as PDF files
    pdf.SaveAs($"{name}-invoice.pdf")
Next

Imports HandlebarsDotNet
Imports IronPdf

' Define Handlebars template with placeholders for HTML content
Dim source As String = 
    "<div class=""entry"">
        <h1>{{title}}</h1>
        <div class=""body"">
            {{body}}
        </div>
    </div>"

' Compile template for reuse in PDF conversion
Dim template = Handlebars.Compile(source)

' Create data object (can be database records) for HTML to PDF directly
Dim data = New With { 
    .title = "Monthly Report", 
    .body = "Sales increased by 15% this month." 
}

' Merge template with data to create HTML content
Dim htmlResult = template(data)

' Convert templated HTML to PDF using the PDF converter
Dim renderer = New ChromePdfRenderer()
Dim pdf = renderer.RenderHtmlAsPdf(htmlResult)

pdf.SaveAs("monthly-report.pdf")

Imports HandlebarsDotNet
Imports IronPdf

' Define Handlebars template with placeholders for HTML content
Dim source As String = 
    "<div class=""entry"">
        <h1>{{title}}</h1>
        <div class=""body"">
            {{body}}
        </div>
    </div>"

' Compile template for reuse in PDF conversion
Dim template = Handlebars.Compile(source)

' Create data object (can be database records) for HTML to PDF directly
Dim data = New With { 
    .title = "Monthly Report", 
    .body = "Sales increased by 15% this month." 
}

' Merge template with data to create HTML content
Dim htmlResult = template(data)

' Convert templated HTML to PDF using the PDF converter
Dim renderer = New ChromePdfRenderer()
Dim pdf = renderer.RenderHtmlAsPdf(htmlResult)

pdf.SaveAs("monthly-report.pdf")

Imports IronPdf
Imports System.Threading.Tasks

' Async method for non-blocking PDF generation from HTML content
Public Async Function GeneratePdfAsync(html As String) As Task(Of Byte())
    Dim renderer As New ChromePdfRenderer()

    ' Async HTML to PDF conversion preserves thread pool
    Dim pdf = Await renderer.RenderHtmlAsPdfAsync(html)

    ' Return PDF files as byte array for web responses
    Return pdf.BinaryData
End Function

' Concurrent batch PDF generation for multiple HTML strings
Public Async Function GenerateMultiplePdfsAsync(htmlPlantillas As List(Of String)) As Task
    Dim renderer As New ChromePdfRenderer()

    ' Create parallel conversion tasks to generate PDF documents
    Dim tasks = htmlPlantillas.Select(Function(html) renderer.RenderHtmlAsPdfAsync(html))

    ' Await all PDF conversions simultaneously
    Dim pdfs = Await Task.WhenAll(tasks)

    ' Save generated PDF files from HTML content
    For i As Integer = 0 To pdfs.Length - 1
        pdfs(i).SaveAs($"document-{i}.pdf")
    Next
End Function

Imports IronPdf
Imports System.Threading.Tasks

' Async method for non-blocking PDF generation from HTML content
Public Async Function GeneratePdfAsync(html As String) As Task(Of Byte())
    Dim renderer As New ChromePdfRenderer()

    ' Async HTML to PDF conversion preserves thread pool
    Dim pdf = Await renderer.RenderHtmlAsPdfAsync(html)

    ' Return PDF files as byte array for web responses
    Return pdf.BinaryData
End Function

' Concurrent batch PDF generation for multiple HTML strings
Public Async Function GenerateMultiplePdfsAsync(htmlPlantillas As List(Of String)) As Task
    Dim renderer As New ChromePdfRenderer()

    ' Create parallel conversion tasks to generate PDF documents
    Dim tasks = htmlPlantillas.Select(Function(html) renderer.RenderHtmlAsPdfAsync(html))

    ' Await all PDF conversions simultaneously
    Dim pdfs = Await Task.WhenAll(tasks)

    ' Save generated PDF files from HTML content
    For i As Integer = 0 To pdfs.Length - 1
        pdfs(i).SaveAs($"document-{i}.pdf")
    Next
End Function

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Convert HTML to PDF with security
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Confidential Report</h1>")

' Configure security settings for PDF files
pdf.SecuritySettings.UserPassword = "user123"     ' Password to open PDF documents
pdf.SecuritySettings.OwnerPassword = "owner456"   ' Password to modify PDF files

' Set granular permissions for PDF format
pdf.SecuritySettings.AllowUserCopyPasteContent = False
pdf.SecuritySettings.AllowUserAnnotations = False
pdf.SecuritySettings.AllowUserPrinting = PrintPermissions.LowQualityPrint

' Apply strong encryption to PDF documents
pdf.SecuritySettings.EncryptionAlgorithm = PdfEncryptionAlgorithm.AES256
pdf.SaveAs("secure-document.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Convert HTML to PDF with security
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Confidential Report</h1>")

' Configure security settings for PDF files
pdf.SecuritySettings.UserPassword = "user123"     ' Password to open PDF documents
pdf.SecuritySettings.OwnerPassword = "owner456"   ' Password to modify PDF files

' Set granular permissions for PDF format
pdf.SecuritySettings.AllowUserCopyPasteContent = False
pdf.SecuritySettings.AllowUserAnnotations = False
pdf.SecuritySettings.AllowUserPrinting = PrintPermissions.LowQualityPrint

' Apply strong encryption to PDF documents
pdf.SecuritySettings.EncryptionAlgorithm = PdfEncryptionAlgorithm.AES256
pdf.SaveAs("secure-document.pdf")

Imports IronPdf
Imports IronPdf.Signing

Dim renderer As New ChromePdfRenderer()

' Generate PDF from HTML page
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Contract Agreement</h1>")

' Create digital signature with certificate for PDF files
Dim signature As New PdfSignature("certificate.pfx", "password") With {
    .SigningContact = "legal@company.com",
    .SigningLocation = "New York, NY",
    .SigningReason = "Contract Approval",
    .SignerName = "Authorized Signer"  ' New property in v2025.8.8 for enhanced signature details
}

' Apply signature to PDF documents
pdf.Sign(signature)
pdf.SaveAs("signed-contract.pdf")

Imports IronPdf
Imports IronPdf.Signing

Dim renderer As New ChromePdfRenderer()

' Generate PDF from HTML page
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Contract Agreement</h1>")

' Create digital signature with certificate for PDF files
Dim signature As New PdfSignature("certificate.pfx", "password") With {
    .SigningContact = "legal@company.com",
    .SigningLocation = "New York, NY",
    .SigningReason = "Contract Approval",
    .SignerName = "Authorized Signer"  ' New property in v2025.8.8 for enhanced signature details
}

' Apply signature to PDF documents
pdf.Sign(signature)
pdf.SaveAs("signed-contract.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Enable HTML form to PDF form conversion
renderer.RenderingOptions.CreatePdfFormsFromHtml = True

Dim htmlForm As String = "
    <h2>Employee Onboarding Form</h2>
    <form>
        <label>Full Name:</label>
        <input type='text' name='fullName' value='' /><br/>
        <label>Department:</label>
        <select name='department'>
            <option value='engineering'>Engineering</option>
            <option value='marketing'>Marketing</option>
            <option value='sales'>Sales</option>
        </select><br/>
        <label>Agree to Terms:</label>
        <input type='checkbox' name='agreeTerms' />
    </form>"

Dim pdf = renderer.RenderHtmlAsPdf(htmlForm)
pdf.SaveAs("onboarding-form.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Enable HTML form to PDF form conversion
renderer.RenderingOptions.CreatePdfFormsFromHtml = True

Dim htmlForm As String = "
    <h2>Employee Onboarding Form</h2>
    <form>
        <label>Full Name:</label>
        <input type='text' name='fullName' value='' /><br/>
        <label>Department:</label>
        <select name='department'>
            <option value='engineering'>Engineering</option>
            <option value='marketing'>Marketing</option>
            <option value='sales'>Sales</option>
        </select><br/>
        <label>Agree to Terms:</label>
        <input type='checkbox' name='agreeTerms' />
    </form>"

Dim pdf = renderer.RenderHtmlAsPdf(htmlForm)
pdf.SaveAs("onboarding-form.pdf")

Imports IronPdf

Dim renderer = New ChromePdfRenderer()
renderer.RenderingOptions.EnableJavaScript = True

' Replace the body with only the target element
renderer.RenderingOptions.JavaScript = "
    var el = document.querySelector('#invoice-summary');
    if (el) {
        var head = document.head.innerHTML;
        document.body.innerHTML = el.outerHTML;
        document.head.innerHTML = head;
    }
"

' Wait for the target element before JS executes
renderer.RenderingOptions.WaitFor.HtmlQuerySelector("#invoice-summary", 10000)

Dim pdf = renderer.RenderHtmlAsPdf(fullPageHtml)
pdf.SaveAs("invoice-summary.pdf")

Imports IronPdf

Dim renderer = New ChromePdfRenderer()
renderer.RenderingOptions.EnableJavaScript = True

' Replace the body with only the target element
renderer.RenderingOptions.JavaScript = "
    var el = document.querySelector('#invoice-summary');
    if (el) {
        var head = document.head.innerHTML;
        document.body.innerHTML = el.outerHTML;
        document.head.innerHTML = head;
    }
"

' Wait for the target element before JS executes
renderer.RenderingOptions.WaitFor.HtmlQuerySelector("#invoice-summary", 10000)

Dim pdf = renderer.RenderHtmlAsPdf(fullPageHtml)
pdf.SaveAs("invoice-summary.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Configure network authentication
renderer.LoginCredentials = New ChromeHttpLoginCredentials With {
    .NetworkUsername = "user@domain.com",
    .NetworkPassword = "securePassword",
    .AuthenticationType = ChromeHttpLoginCredentials.AuthType.Basic
}

Dim pdf = renderer.RenderUrlAsPdf("https://intranet.company.com/reports")
pdf.SaveAs("authenticated-report.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Configure network authentication
renderer.LoginCredentials = New ChromeHttpLoginCredentials With {
    .NetworkUsername = "user@domain.com",
    .NetworkPassword = "securePassword",
    .AuthenticationType = ChromeHttpLoginCredentials.AuthType.Basic
}

Dim pdf = renderer.RenderUrlAsPdf("https://intranet.company.com/reports")
pdf.SaveAs("authenticated-report.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Add session cookies
renderer.RenderingOptions.CustomCookies("sessionId") = "abc123token"
renderer.RenderingOptions.CustomCookies("authToken") = "bearer-xyz"

' Add custom HTTP headers (e.g., API key or Bearer token)
renderer.RenderingOptions.CustomHttpRequestHeaders("Authorization") = "Bearer eyJhbGciOi..."

Dim pdf = renderer.RenderUrlAsPdf("https://app.example.com/dashboard")
pdf.SaveAs("dashboard.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

' Add session cookies
renderer.RenderingOptions.CustomCookies("sessionId") = "abc123token"
renderer.RenderingOptions.CustomCookies("authToken") = "bearer-xyz"

' Add custom HTTP headers (e.g., API key or Bearer token)
renderer.RenderingOptions.CustomHttpRequestHeaders("Authorization") = "Bearer eyJhbGciOi..."

Dim pdf = renderer.RenderUrlAsPdf("https://app.example.com/dashboard")
pdf.SaveAs("dashboard.pdf")

Dim renderer = New ChromePdfRenderer()

Dim part1 As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Section 1</h1><p>First section content</p>")
Dim part2 As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Section 2</h1><p>Second section content</p>")

Dim merged = PdfDocument.Merge(part1, part2)
merged.SaveAs("Merged.pdf")

' Alternative approach: copy specific pages
Dim combinedDoc = New PdfDocument()
combinedDoc.CopyPage(part1, 0) ' Copy first page
combinedDoc.CopyPage(part2, 0) ' Copy first page
combinedDoc.SaveAs("Combined.pdf")

Dim renderer = New ChromePdfRenderer()

Dim part1 As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Section 1</h1><p>First section content</p>")
Dim part2 As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Section 2</h1><p>Second section content</p>")

Dim merged = PdfDocument.Merge(part1, part2)
merged.SaveAs("Merged.pdf")

' Alternative approach: copy specific pages
Dim combinedDoc = New PdfDocument()
combinedDoc.CopyPage(part1, 0) ' Copy first page
combinedDoc.CopyPage(part2, 0) ' Copy first page
combinedDoc.SaveAs("Combined.pdf")

<HttpGet("download")>
Public Function GetPdf() As IActionResult
    Dim renderer = New ChromePdfRenderer()
    Dim html As String = "<h1>Web Report</h1><p>Generated dynamically.</p>"

    Dim pdf = renderer.RenderHtmlAsPdf(html)
    Dim bytes = pdf.BinaryData

    ' Optional: Add metadata
    pdf.MetaData.Author = "API Service"
    pdf.MetaData.CreationDate = DateTime.Now

    Return File(bytes, "application/pdf", "report.pdf")
End Function

<HttpGet("download")>
Public Function GetPdf() As IActionResult
    Dim renderer = New ChromePdfRenderer()
    Dim html As String = "<h1>Web Report</h1><p>Generated dynamically.</p>"

    Dim pdf = renderer.RenderHtmlAsPdf(html)
    Dim bytes = pdf.BinaryData

    ' Optional: Add metadata
    pdf.MetaData.Author = "API Service"
    pdf.MetaData.CreationDate = DateTime.Now

    Return File(bytes, "application/pdf", "report.pdf")
End Function

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

renderer.RenderingOptions.HtmlHeader = New HtmlHeaderFooter With {
    .MaxHeight = 50,
    .HtmlFragment = "<div style='text-align:center;font-size:12px;'>Annual Report 2025 -- Confidential</div>",
    .BaseUrl = New Uri("file:///C:/assets/")
}

renderer.RenderingOptions.HtmlFooter = New HtmlHeaderFooter With {
    .MaxHeight = 30,
    .HtmlFragment = "<div style='text-align:center;font-size:10px;'>Page {page} of {total-pages}</div>",
    .DrawDividerLine = True
}

renderer.RenderingOptions.MarginTop = 60
renderer.RenderingOptions.MarginBottom = 40

Dim pdf = renderer.RenderHtmlAsPdf("<h1>Report Content</h1><p>Body text here.</p>")
pdf.SaveAs("report-with-headers.pdf")

Imports IronPdf

Dim renderer As New ChromePdfRenderer()

renderer.RenderingOptions.HtmlHeader = New HtmlHeaderFooter With {
    .MaxHeight = 50,
    .HtmlFragment = "<div style='text-align:center;font-size:12px;'>Annual Report 2025 -- Confidential</div>",
    .BaseUrl = New Uri("file:///C:/assets/")
}

renderer.RenderingOptions.HtmlFooter = New HtmlHeaderFooter With {
    .MaxHeight = 30,
    .HtmlFragment = "<div style='text-align:center;font-size:10px;'>Page {page} of {total-pages}</div>",
    .DrawDividerLine = True
}

renderer.RenderingOptions.MarginTop = 60
renderer.RenderingOptions.MarginBottom = 40

Dim pdf = renderer.RenderHtmlAsPdf("<h1>Report Content</h1><p>Body text here.</p>")
pdf.SaveAs("report-with-headers.pdf")

Imports IronPdf
Imports System.Security.Cryptography.X509Certificates

Dim renderer As New ChromePdfRenderer()
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Contract Agreement</h1><p>Terms and conditions.</p>")

' Watermark
pdf.ApplyWatermark(
    "<div style='font-size:72px;color:red;opacity:0.3;'>DRAFT</div>",
    rotation:=45,
    opacity:=30
)

' Encryption and permissions
pdf.SecuritySettings.UserPassword = "user123"
pdf.SecuritySettings.OwnerPassword = "owner456"
pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.NoPrint
pdf.SecuritySettings.AllowUserCopyPasteContent = False

' Digital signature
Dim cert = X509CertificateLoader.LoadPkcs12FromFile("certificate.pfx", "password")
Dim signature As New PdfSignature(cert) With {
    .SigningContact = "Jane Smith",
    .SigningLocation = "New York, NY",
    .SigningReason = "Contract Approval"
}
pdf.Sign(signature)
pdf.SaveAsRevision("signed-contract.pdf")

Imports IronPdf
Imports System.Security.Cryptography.X509Certificates

Dim renderer As New ChromePdfRenderer()
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Contract Agreement</h1><p>Terms and conditions.</p>")

' Watermark
pdf.ApplyWatermark(
    "<div style='font-size:72px;color:red;opacity:0.3;'>DRAFT</div>",
    rotation:=45,
    opacity:=30
)

' Encryption and permissions
pdf.SecuritySettings.UserPassword = "user123"
pdf.SecuritySettings.OwnerPassword = "owner456"
pdf.SecuritySettings.AllowUserPrinting = IronPdf.Security.PdfPrintSecurity.NoPrint
pdf.SecuritySettings.AllowUserCopyPasteContent = False

' Digital signature
Dim cert = X509CertificateLoader.LoadPkcs12FromFile("certificate.pfx", "password")
Dim signature As New PdfSignature(cert) With {
    .SigningContact = "Jane Smith",
    .SigningLocation = "New York, NY",
    .SigningReason = "Contract Approval"
}
pdf.Sign(signature)
pdf.SaveAsRevision("signed-contract.pdf")