C# JPG转PDF

【实例简介】调用itextsharp.dll实现 JPG转PDF
【实例截图】

转换效果如下：

【核心代码】

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using iTextSharp;
using iTextSharp.text;
using iTextSharp.text.pdf;

namespace jpgTOpdf
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void jpgbutton_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog path = new FolderBrowserDialog();
            path.ShowDialog();
            jpgtextBox.Text = path.SelectedPath;
        }

        private void pdfbutton_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog path = new FolderBrowserDialog();
            path.ShowDialog();
            pdftextBox.Text = path.SelectedPath;
        }

        private void zhbutton_Click(object sender, EventArgs e)
        {
            if (jpgtextBox.Text != "" && pdftextBox.Text != "")
            {
                try
                {
                    var files = Directory.GetFiles(jpgtextBox.Text, "*.tif");
                    label3.Text = "共发现:"   files.Count().ToString()   "个文件";
                    foreach (var file in files)
                    {
                        图片转PDF(file, pdftextBox.Text   "\\"   Path.GetFileNameWithoutExtension(file)   ".pdf");
                    }
                    MessageBox.Show("导出完成！");
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }

            }
            else
            {
                MessageBox.Show("JPG路径或PDF路径不能为空", "提示", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            }
        }
        private void 图片转PDF(string source, string output)//图片转PDF
        {
            iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(source);//
            using (FileStream fs = new FileStream(output, FileMode.Create, FileAccess.Write, FileShare.None))
            {
                using (Document doc = new Document(image))
                {
                    using (PdfWriter writer = PdfWriter.GetInstance(doc, fs))
                    {
                        //writer.CompressionLevel = 0;
                        writer.SetFullCompression();
                        writer.SetPdfVersion(iTextSharp.text.pdf.PdfWriter.PDF_VERSION_1_7);
                        //writer.CompressionLevel = PdfStream.NO_COMPRESSION; 

                        doc.Open();
                        image.SetAbsolutePosition(0, 0);
                        doc.SetPageSize(new iTextSharp.text.Rectangle(0, 0, image.Width, image.Height, 0));
                        doc.NewPage();

                        writer.DirectContent.AddImage(image, false);
                        doc.Close();
                    }
                }
            }
        }     


    }


}