使用itextsharp嵌入多张图片到PDF中，并生成新的PDF文档，实现方法 第二章

 

添加MergePDFImage类到项目中

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using iTextSharp.text.pdf;
using iTextSharp.text;
using System.IO;

namespace MergePDFAndImage
{
    public class MergePDF
    {
        public MergePDF() { }
        /// <summary>
        /// 将一个pdf和多张图片进行整合
        /// </summary>
        /// <param name="oldPdf">老的pdf</param>
        /// <param name="imageList">需要整合的圖片</param>
        /// <param name="newPdf">整合後新的pdf</param>
        /// <param name="ImgX1">圖片1的X座標</param>
        /// <param name="ImgY1">圖片1的Y座標</param>
        /// <param name="ImgWidth1">圖片1的寬</param>
        /// <param name="ImgHeigth1">圖片1的高</param>
        /// <param name="TempX1">模版1的X座標</param>
        /// <param name="TempY1">模版1的Y座標</param>
        /// <param name="ImgX2">圖片2的X座標</param>
        /// <param name="ImgY2">圖片2的Y座標</param>
        /// <param name="ImgWidth2">圖片2的寬</param>
        /// <param name="ImgHeigth2">圖片2的高</param>
        /// <param name="TempX2">模版2的X座標</param>
        /// <param name="TempY2">模版2的Y座標</param>
        public static void mergePDFwithMoreImage(string oldPdf, string[] imageList, string newPdf, float ImgX1, float ImgY1, float ImgWidth1,
            float ImgHeigth1, float TempX1, float TempY1, float ImgX2, float ImgY2, float ImgWidth2, float ImgHeigth2, float TempX2, float TempY2)
        {

            //读取想要修改的PDF
            PdfReader reader = new PdfReader(oldPdf);
            //得到老PDF的所有页码
            int n = reader.NumberOfPages;
            //创建一个新的PDF
            Document document = new Document(reader.GetPageSizeWithRotation(1));
            PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(newPdf, FileMode.Create));
            document.Open();
            PdfContentByte cb = writer.DirectContent;
            PdfImportedPage page;
            int rotation;
            ////读取图片
            //for (int j = 0; j < imageList.Length; j++)
            //{

            //    iTextSharp.text.Image mm = iTextSharp.text.Image.GetInstance(imageList[j]);
            //    //设置图片的位置
            //    mm.SetAbsolutePosition(50 + j, 50 + j);
            //    //设置图片的大小
            //    mm.ScaleAbsolute(50 + j, 50 + j);
            //}

            int i = 0;

            //循环要修改的PDF的页数
            while (i < n)
            {
                i++;

                //将拷贝过来的内容添加到模板上
                document.SetPageSize(reader.GetPageSizeWithRotation(i));
                document.NewPage();
                page = writer.GetImportedPage(reader, i);
                rotation = reader.GetPageRotation(i);
                if (rotation == 90 || rotation == 270)
                {
                    cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(i).Height);
                }
                else
                {
                    cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
                }

                //在PDF第一页上面加上签名档

                if (i == 1)
                {
                    iTextSharp.text.Image mm;
                    PdfContentByte cb1 = writer.DirectContent;
                    //创建一个新的模板，设置模板的大小
                    PdfTemplate template1 = cb.CreateTemplate(500, 500);
                    PdfTemplate template2 = cb.CreateTemplate(500, 500);

                    //读取图片 add by sara
                    for (int j = 0; j < imageList.Length; j++)
                    {
                        if (j == 0)
                        {
                            mm = iTextSharp.text.Image.GetInstance(imageList[0]);
                            //设置图片的位置
                            //mm.SetAbsolutePosition(50, -10);
                            mm.SetAbsolutePosition(ImgX1, ImgY1);
                            //设置图片的大小
                            //mm.ScaleAbsolute(60, 60);
                            mm.ScaleAbsolute(ImgWidth1, ImgHeigth1);

                            template1.AddImage(mm);
                        }
                        else
                        {
                            mm = iTextSharp.text.Image.GetInstance(imageList[1]);
                            //设置图片的位置
                            //mm.SetAbsolutePosition(100, -10);
                            mm.SetAbsolutePosition(ImgX2, ImgY2);
                            //设置图片的大小
                            //mm.ScaleAbsolute(60, 60);
                            mm.ScaleAbsolute(ImgWidth2, ImgHeigth2);

                            template2.AddImage(mm);

                        }

                    }

                    //设置添加模板的位置
                    //cb1.AddTemplate(template1, 90, 50);
                    cb1.AddTemplate(template1, TempX1, TempY1);
                    //cb1.AddTemplate(template2, 410, 50);
                    cb1.AddTemplate(template2, TempX2, TempY2);
                }
            }

            document.Close();
            reader.Close();
        }
    }
}