C#——使用iTextSharp生成pdf文件

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

List<String> pages = new List<String>();//存放所有页码

iTextSharp.text.Image image;

//设置文档大小及边距
Document document = new Document(iTextSharp.text.PageSize.A4, 25, 25, 25, 25);
//生成pdf
PdfWriter.GetInstance(document, new FileStream(desPath + name + ".pdf", FileMode.Create));
document.Open();

foreach (string p in pages)//逐个插入图片
{
//获取图片文件名
fileTif = Directory.GetFiles(desPath, p + ".tif", SearchOption.AllDirectories);
if (fileTif.Length == 0)
{
WriteFile(textBox2.Text + "//err.txt", fileZIP[0] + "中" + p + ".tif" + "未找到！！"
+ desPath + filename + (ii + 1).ToString() + ".pdf中缺少该页");
continue;
}

image = iTextSharp.text.Image.GetInstance(fileTif[0]);
//调整图片大小，使之适合A4
if (image.Height > iTextSharp.text.PageSize.A4.Height - 25)
image.ScaleToFit(iTextSharp.text.PageSize.A4.Width - 25, iTextSharp.text.PageSize.A4.Height - 25);
else if (image.Width > iTextSharp.text.PageSize.A4.Width - 25)
image.ScaleToFit(iTextSharp.text.PageSize.A4.Width - 25, iTextSharp.text.PageSize.A4.Height - 25);
//调整图片位置，使之居中
image.Alignment = iTextSharp.text.Image.ALIGN_MIDDLE;
document.NewPage();
document.Add(image);
}

document.Close();