C#添加图像到PDF（开发者教程）

using IronPdf;
using System.IO;
using System.Drawing;

class PDFImageAdder
{
    /* This method demonstrates how to convert an image file to a PDF document in C# */
    static void Main(string[] args)
    {
        // Initialize IronPdf Renderer
        var renderer = new IronPdf.ChromePdfRenderer();

        // Read the PNG image file into binary format
        var pngBinaryData = File.ReadAllBytes("embed_me.png");

        // Convert image binary data to base64 for embedding in HTML
        var ImgDataURI = "data:image/png;base64," + Convert.ToBase64String(pngBinaryData);

        // Embed the image as a base64 data URI in an HTML <img> tag
        var ImgHtml = $"<img src='{ImgDataURI}'>";

        // Render the HTML as a PDF document
        using var pdfdoc = renderer.RenderHtmlAsPdf(ImgHtml);

        // Save the rendered PDF document
        pdfdoc.SaveAs("embedded_example_1.pdf");
    }
}

Imports IronPdf
Imports System.IO
Imports System.Drawing

Friend Class PDFImageAdder
	' This method demonstrates how to convert an image file to a PDF document in C# 
	Shared Sub Main(ByVal args() As String)
		' Initialize IronPdf Renderer
		Dim renderer = New IronPdf.ChromePdfRenderer()

		' Read the PNG image file into binary format
		Dim pngBinaryData = File.ReadAllBytes("embed_me.png")

		' Convert image binary data to base64 for embedding in HTML
		Dim ImgDataURI = "data:image/png;base64," & Convert.ToBase64String(pngBinaryData)

		' Embed the image as a base64 data URI in an HTML <img> tag
		Dim ImgHtml = $"<img src='{ImgDataURI}'>"

		' Render the HTML as a PDF document
		Dim pdfdoc = renderer.RenderHtmlAsPdf(ImgHtml)

		' Save the rendered PDF document
		pdfdoc.SaveAs("embedded_example_1.pdf")
	End Sub
End Class

using IronPdf;
using System.Drawing;

class PDFImageAdder
{
    static void Main(string[] args)
    {
        // Initialize IronPdf Renderer
        var renderer = new IronPdf.ChromePdfRenderer();

        // Create a Bitmap image
        Bitmap MyImage = new Bitmap("Path-to-Your-Image");

        // Convert the Bitmap image to a Data URI
        string DataURI = IronPdf.Util.ImageToDataUri(MyImage);

        // Embed the image as a Data URI in an HTML <img> tag
        var ImgHtml = $"<img src='{DataURI}'>";

        // Render the HTML to PDF
        using var pdfdoc2 = renderer.RenderHtmlAsPdf(ImgHtml);

        // Save the PDF document
        pdfdoc2.SaveAs("embedded_example_2.pdf");
    }
}

Imports IronPdf
Imports System.Drawing

Friend Class PDFImageAdder
	Shared Sub Main(ByVal args() As String)
		' Initialize IronPdf Renderer
		Dim renderer = New IronPdf.ChromePdfRenderer()

		' Create a Bitmap image
		Dim MyImage As New Bitmap("Path-to-Your-Image")

		' Convert the Bitmap image to a Data URI
		Dim DataURI As String = IronPdf.Util.ImageToDataUri(MyImage)

		' Embed the image as a Data URI in an HTML <img> tag
		Dim ImgHtml = $"<img src='{DataURI}'>"

		' Render the HTML to PDF
		Dim pdfdoc2 = renderer.RenderHtmlAsPdf(ImgHtml)

		' Save the PDF document
		pdfdoc2.SaveAs("embedded_example_2.pdf")
	End Sub
End Class