基于C#实现将图片转换为PDF文档

ing System.Drawing;
using Spire.Pdf;
using Spire.Pdf.Graphics;

namespace ConvertImageToPdfWithSameSize
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建PdfDocument对象
            PdfDocument pdf = new PdfDocument();

            //将页边距设为0
            pdf.PageSettings.SetMargins(0);

            //加载图片
            Image image = Image.FromFile(@"C:\Users\Administrator\Desktop\work.jpg");

            //获取图片尺寸
            float width = image.PhysicalDimension.Width;
            float height = image.PhysicalDimension.Height;

            //创建PdfImage对象
            PdfImage pdfImage = PdfImage.FromFile(@"C:\Users\Administrator\Desktop\work.jpg");

            //添加一个与图片大小相同的PDF页面
            PdfPageBase page = pdf.Pages.Add(new SizeF(width, height));

            //在页面上绘制图片
            page.Canvas.DrawImage(pdfImage, 0, 0, pdfImage.Width, pdfImage.Height);

            //保存PDF
            pdf.SaveToFile("图片转Pdf.pdf");
        }
    }
}

using Spire.Pdf;
using Spire.Pdf.Graphics;
using System.Drawing;
using System.IO;

namespace ConvertMultipleImagesIntoPdf
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建PdfDocument对象
            PdfDocument pdf = new PdfDocument();

            //将页边距设为0
            pdf.PageSettings.SetMargins(0);

            //获取存储图片的文件夹
            DirectoryInfo folder = new DirectoryInfo(@"C:\Users\Administrator\Desktop\图片");

            //遍历文件夹中的图片
            foreach (FileInfo file in folder.GetFiles())
            {
                //加载图片
                Image image = Image.FromFile(file.FullName);

                //获取图片尺寸
                float width = image.PhysicalDimension.Width;
                float height = image.PhysicalDimension.Height;

                //添加与图片大小相同的PDF页面
                PdfPageBase page = pdf.Pages.Add(new SizeF(width, height));

                //创建PdfImage对象
                PdfImage pdfImage = PdfImage.FromFile(file.FullName);

                //在页面上绘制图片
                page.Canvas.DrawImage(pdfImage, 0, 0, pdfImage.Width, pdfImage.Height);
            }

            //保存PDF
            pdf.SaveToFile("多图转Pdf.pdf");
            pdf.Dispose();
        }
    }
}