How to Migrate from Sumatra PDF to IronPDF in C#

# Install IronPDF
dotnet add package IronPdf

// Add at application startup
IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

' Add at application startup
IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

// Before: Sumatra PDF (external process)
using System.Diagnostics;
using System.IO;

// After: IronPDF
using IronPdf;

' Before: Sumatra PDF (external process)
Imports System.Diagnostics
Imports System.IO

' After: IronPDF
Imports IronPdf

// Sumatra PDF is a standalone Windows app (AGPLv3) — there is NO official NuGet package.
// Download SumatraPDF.exe from https://www.sumatrapdfreader.org/ and shell out to it.
// Sumatra is a viewer/printer only; it cannot convert HTML to PDF, so you must use a
// separate HTML-to-PDF tool (e.g. wkhtmltopdf) and then view/print with Sumatra.
using System.Diagnostics;
using System.IO;

class Program
{
    static void Main()
    {
        // Sumatra PDF cannot directly convert HTML to PDF
        // You'd need to use wkhtmltopdf or similar, then view in Sumatra
        string htmlFile = "input.html";
        string pdfFile = "output.pdf";

        // Using wkhtmltopdf as intermediary
        ProcessStartInfo psi = new ProcessStartInfo
        {
            FileName = "wkhtmltopdf.exe",
            Arguments = $"{htmlFile} {pdfFile}",
            UseShellExecute = false
        };
        Process.Start(psi)?.WaitForExit();

        // Then open with Sumatra
        Process.Start("SumatraPDF.exe", pdfFile);
    }
}

Imports System.Diagnostics
Imports System.IO

Module Program
    Sub Main()
        ' Sumatra PDF cannot directly convert HTML to PDF
        ' You'd need to use wkhtmltopdf or similar, then view in Sumatra
        Dim htmlFile As String = "input.html"
        Dim pdfFile As String = "output.pdf"

        ' Using wkhtmltopdf as intermediary
        Dim psi As New ProcessStartInfo With {
            .FileName = "wkhtmltopdf.exe",
            .Arguments = $"{htmlFile} {pdfFile}",
            .UseShellExecute = False
        }
        Process.Start(psi)?.WaitForExit()

        ' Then open with Sumatra
        Process.Start("SumatraPDF.exe", pdfFile)
    End Sub
End Module

// NuGet: Install-Package IronPdf
using IronPdf;
using System;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();

        string htmlContent = "<h1>Hello World</h1><p>This is HTML to PDF conversion.</p>";

        var pdf = renderer.RenderHtmlAsPdf(htmlContent);
        pdf.SaveAs("output.pdf");

        Console.WriteLine("PDF created successfully!");
    }
}

Imports IronPdf
Imports System

Module Program
    Sub Main()
        Dim renderer = New ChromePdfRenderer()

        Dim htmlContent As String = "<h1>Hello World</h1><p>This is HTML to PDF conversion.</p>"

        Dim pdf = renderer.RenderHtmlAsPdf(htmlContent)
        pdf.SaveAs("output.pdf")

        Console.WriteLine("PDF created successfully!")
    End Sub
End Module

// Sumatra PDF is a standalone Windows app (AGPLv3) — no official NuGet package.
// Download SumatraPDF.exe from https://www.sumatrapdfreader.org/ and call it via Process.Start.
// Useful CLI flags: -page <n>, -print-to-default, -print-to "<printer>", -print-settings, -silent.
using System.Diagnostics;
using System.IO;

class Program
{
    static void Main()
    {
        string pdfPath = "document.pdf";

        // Sumatra PDF excels at viewing PDFs
        ProcessStartInfo startInfo = new ProcessStartInfo
        {
            FileName = "SumatraPDF.exe",
            Arguments = $"\"{pdfPath}\"",
            UseShellExecute = true
        };

        Process.Start(startInfo);

        // Optional: Open specific page
        // Arguments = $"-page 5 \"{pdfPath}\""
    }
}

Imports System.Diagnostics
Imports System.IO

Module Program
    Sub Main()
        Dim pdfPath As String = "document.pdf"

        ' Sumatra PDF excels at viewing PDFs
        Dim startInfo As New ProcessStartInfo With {
            .FileName = "SumatraPDF.exe",
            .Arguments = $"""{pdfPath}""",
            .UseShellExecute = True
        }

        Process.Start(startInfo)

        ' Optional: Open specific page
        ' startInfo.Arguments = $"-page 5 ""{pdfPath}"""
    End Sub
End Module

// NuGet: Install-Package IronPdf
using IronPdf;
using System;
using System.Diagnostics;

class Program
{
    static void Main()
    {
        var pdf = PdfDocument.FromFile("document.pdf");

        // Extract information
        Console.WriteLine($"Page Count: {pdf.PageCount}");

        // IronPDF can manipulate and save, then open with default viewer
        pdf.SaveAs("modified.pdf");

        // Open with default PDF viewer
        Process.Start(new ProcessStartInfo("modified.pdf") { UseShellExecute = true });
    }
}

Imports IronPdf
Imports System
Imports System.Diagnostics

Class Program
    Shared Sub Main()
        Dim pdf = PdfDocument.FromFile("document.pdf")

        ' Extract information
        Console.WriteLine($"Page Count: {pdf.PageCount}")

        ' IronPDF can manipulate and save, then open with default viewer
        pdf.SaveAs("modified.pdf")

        ' Open with default PDF viewer
        Process.Start(New ProcessStartInfo("modified.pdf") With {.UseShellExecute = True})
    End Sub
End Class

// Sumatra PDF is a standalone Windows viewer (AGPLv3) — no official NuGet package
// and no programmatic text-extraction API. To extract text you must shell out to a
// separate tool such as pdftotext (Xpdf / Poppler).
using System;
using System.Diagnostics;
using System.IO;

class Program
{
    static void Main()
    {
        // Sumatra PDF is a viewer, not a text extraction library
        // You'd need to use PDFBox, iTextSharp, or similar for extraction

        string pdfFile = "document.pdf";

        // This would require external tools like pdftotext
        ProcessStartInfo psi = new ProcessStartInfo
        {
            FileName = "pdftotext.exe",
            Arguments = $"{pdfFile} output.txt",
            UseShellExecute = false
        };

        Process.Start(psi)?.WaitForExit();

        string extractedText = File.ReadAllText("output.txt");
        Console.WriteLine(extractedText);
    }
}

Imports System
Imports System.Diagnostics
Imports System.IO

Module Program
    Sub Main()
        ' Sumatra PDF is a viewer, not a text extraction library
        ' You'd need to use PDFBox, iTextSharp, or similar for extraction

        Dim pdfFile As String = "document.pdf"

        ' This would require external tools like pdftotext
        Dim psi As New ProcessStartInfo With {
            .FileName = "pdftotext.exe",
            .Arguments = $"{pdfFile} output.txt",
            .UseShellExecute = False
        }

        Process.Start(psi)?.WaitForExit()

        Dim extractedText As String = File.ReadAllText("output.txt")
        Console.WriteLine(extractedText)
    End Sub
End Module

// NuGet: Install-Package IronPdf
using IronPdf;
using System;

class Program
{
    static void Main()
    {
        var pdf = PdfDocument.FromFile("document.pdf");

        // Extract text from all pages
        string allText = pdf.ExtractAllText();
        Console.WriteLine("Extracted Text:");
        Console.WriteLine(allText);

        // Extract text from specific page
        string pageText = pdf.ExtractTextFromPage(0);
        Console.WriteLine($"\nFirst Page Text:\n{pageText}");
    }
}

Imports IronPdf
Imports System

Class Program
    Shared Sub Main()
        Dim pdf = PdfDocument.FromFile("document.pdf")

        ' Extract text from all pages
        Dim allText As String = pdf.ExtractAllText()
        Console.WriteLine("Extracted Text:")
        Console.WriteLine(allText)

        ' Extract text from specific page
        Dim pageText As String = pdf.ExtractTextFromPage(0)
        Console.WriteLine(vbCrLf & "First Page Text:" & vbCrLf & pageText)
    End Sub
End Class

var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf(@"
    <html>
    <head><style>body { font-family: Arial; }</style></head>
    <body>
        <h1>Invoice #12345</h1>
        <p>Thank you for your purchase.</p>
    </body>
    </html>");

pdf.SaveAs("invoice.pdf");

Dim renderer = New ChromePdfRenderer()
Dim pdf = renderer.RenderHtmlAsPdf("
    <html>
    <head><style>body { font-family: Arial; }</style></head>
    <body>
        <h1>Invoice #12345</h1>
        <p>Thank you for your purchase.</p>
    </body>
    </html>")

pdf.SaveAs("invoice.pdf")

var pdf1 = PdfDocument.FromFile("chapter1.pdf");
var pdf2 = PdfDocument.FromFile("chapter2.pdf");
var pdf3 = PdfDocument.FromFile("chapter3.pdf");

var book = PdfDocument.Merge(pdf1, pdf2, pdf3);
book.SaveAs("complete_book.pdf");

Dim pdf1 = PdfDocument.FromFile("chapter1.pdf")
Dim pdf2 = PdfDocument.FromFile("chapter2.pdf")
Dim pdf3 = PdfDocument.FromFile("chapter3.pdf")

Dim book = PdfDocument.Merge(pdf1, pdf2, pdf3)
book.SaveAs("complete_book.pdf")

var pdf = PdfDocument.FromFile("document.pdf");

pdf.ApplyWatermark(@"
    <div style='
        font-size: 60pt;
        color: rgba(255, 0, 0, 0.3);
        transform: rotate(-45deg);
    '>
        CONFIDENTIAL
    </div>");

pdf.SaveAs("watermarked.pdf");

Dim pdf = PdfDocument.FromFile("document.pdf")

pdf.ApplyWatermark("
    <div style='
        font-size: 60pt;
        color: rgba(255, 0, 0, 0.3);
        transform: rotate(-45deg);
    '>
        CONFIDENTIAL
    </div>")

pdf.SaveAs("watermarked.pdf")

var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf("<h1>Sensitive Data</h1>");

pdf.SecuritySettings.OwnerPassword = "owner123";
pdf.SecuritySettings.UserPassword = "user456";
pdf.SecuritySettings.AllowUserCopyPasteContent = false;
pdf.SecuritySettings.AllowUserPrinting = PdfPrintSecurity.NoPrint;

pdf.SaveAs("protected.pdf");

Dim renderer As New ChromePdfRenderer()
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Sensitive Data</h1>")

pdf.SecuritySettings.OwnerPassword = "owner123"
pdf.SecuritySettings.UserPassword = "user456"
pdf.SecuritySettings.AllowUserCopyPasteContent = False
pdf.SecuritySettings.AllowUserPrinting = PdfPrintSecurity.NoPrint

pdf.SaveAs("protected.pdf")