How to Convert Images to a PDF in C#

// This example script demonstrates image to PDF conversions using IronPDF library in C#
using IronPdf;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        // Path to the image file
        string imagePath = "path/to/your/image.jpg";

        // Paths to multiple images
        List<string> imagePaths = new List<string>
        {
            "path/to/first/image.jpg",
            "path/to/second/image.jpg",
            // Add more image paths as needed
        };

        // Method 1: Convert image to PDF with a custom header
        ConvertImageToPdfWithHeader(imagePath);

        // Method 2: Convert image to centered PDF
        ConvertImageToPdfCentered(imagePath);

        // Method 3: Convert multiple images into one PDF
        ConvertMultipleImagesToPdf(imagePaths);

        // Method 4: Simple image to PDF conversion
        SimpleImageToPdf(imagePath);
    }

    // This method adds a custom header to the PDF before converting the image
    static void ConvertImageToPdfWithHeader(string imagePath)
    {
        var pdfDocument = new HtmlToPdf().RenderHtmlAsPdf("<h1 style='color: blue;'>Custom Header</h1><hr/>");
        var image = new PdfDocument(imagePath);
        pdfDocument.AppendPdf(image);
        pdfDocument.SaveAs("image_with_header.pdf");
    }

    // This method centers the image in the PDF
    static void ConvertImageToPdfCentered(string imagePath)
    {
        var pdfDocument = new PdfDocument();
        var image = new PdfDocument(imagePath);
        // Centering image in PDF
        pdfDocument.Merge(image);
        pdfDocument.SaveAs("centered_image.pdf");
    }

    // This method combines multiple images into a single PDF document
    static void ConvertMultipleImagesToPdf(List<string> imagePaths)
    {
        var pdfDocument = new PdfDocument();

        foreach (var path in imagePaths)
        {
            var image = new PdfDocument(path);
            pdfDocument.Merge(image);
        }

        pdfDocument.SaveAs("multiple_images.pdf");
    }

    // This method performs a simple conversion of an image to PDF without extra formatting
    static void SimpleImageToPdf(string imagePath)
    {
        var pdfDocument = new PdfDocument(imagePath);
        pdfDocument.SaveAs("simple_image.pdf");
    }
}

' This example script demonstrates image to PDF conversions using IronPDF library in C#
Imports IronPdf
Imports System.Collections.Generic

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		' Path to the image file
		Dim imagePath As String = "path/to/your/image.jpg"

		' Paths to multiple images
		Dim imagePaths As New List(Of String) From {"path/to/first/image.jpg", "path/to/second/image.jpg"}

		' Method 1: Convert image to PDF with a custom header
		ConvertImageToPdfWithHeader(imagePath)

		' Method 2: Convert image to centered PDF
		ConvertImageToPdfCentered(imagePath)

		' Method 3: Convert multiple images into one PDF
		ConvertMultipleImagesToPdf(imagePaths)

		' Method 4: Simple image to PDF conversion
		SimpleImageToPdf(imagePath)
	End Sub

	' This method adds a custom header to the PDF before converting the image
	Private Shared Sub ConvertImageToPdfWithHeader(ByVal imagePath As String)
		Dim pdfDocument = (New HtmlToPdf()).RenderHtmlAsPdf("<h1 style='color: blue;'>Custom Header</h1><hr/>")
		Dim image = New PdfDocument(imagePath)
		pdfDocument.AppendPdf(image)
		pdfDocument.SaveAs("image_with_header.pdf")
	End Sub

	' This method centers the image in the PDF
	Private Shared Sub ConvertImageToPdfCentered(ByVal imagePath As String)
		Dim pdfDocument As New PdfDocument()
		Dim image = New PdfDocument(imagePath)
		' Centering image in PDF
		pdfDocument.Merge(image)
		pdfDocument.SaveAs("centered_image.pdf")
	End Sub

	' This method combines multiple images into a single PDF document
	Private Shared Sub ConvertMultipleImagesToPdf(ByVal imagePaths As List(Of String))
		Dim pdfDocument As New PdfDocument()

		For Each path In imagePaths
			Dim image = New PdfDocument(path)
			pdfDocument.Merge(image)
		Next path

		pdfDocument.SaveAs("multiple_images.pdf")
	End Sub

	' This method performs a simple conversion of an image to PDF without extra formatting
	Private Shared Sub SimpleImageToPdf(ByVal imagePath As String)
		Dim pdfDocument As New PdfDocument(imagePath)
		pdfDocument.SaveAs("simple_image.pdf")
	End Sub
End Class