c#生成PDF准考证

项目中需要做一个生成PDF准考证的功能，在这里跟大家分享一下思路。。

1.首先是下载Adobe Acrobat 9 Pro，安装破解（高版本的貌似破解，不了，自带正版意识的略过。。随意下载）

2.新建模板。。下图是个演示版本，客户要求在一页显示四个准考证， 我实际上是做了4个模板，分别有1，2，3，4个准考证模板在上面

注意的是：一定不要设置错域属性，开发的时候，不小心把座位号 设置成了 图片域，死活填充不上数据其余都可以，。。。应该设置为文本域

3.查询数据库拿到考生信息，放到一个List集合中

4.以4为单位进行循环，分别找对应的准考证模板，进行数据填充，特别注意的是每次都要根据个数找到对应的模板进行填充

5.每次生成一个PDF文件，记录文件名

6.最后进行文件的合并。。

7.用到的插件 itextsharp，大家抖动

8.核心代码。。

1.传递考生信息进去，返回需要填充的数据。。。（这个地方，我创建的模板上 命名规则都是统一的，第一个准考证序号是 name1,第二个是name2....以此类推）

public Dictionary<string, string> ReadForm(List<ExamInfoEntity> list)
        {
            string pdfTemplate = string.Empty;
            string baseTemplatePath = @"D:\wangmj\fileserver\pdftemplate";
            if (CheckUtil.CheckList(list))//根据传递集合元素个数,对应不同的PDF模板文件
            {
                pdfTemplate = Path.Combine(baseTemplatePath, "zkztemplate" + list.Count + ".pdf");
            }
            Dictionary<string, string> dic = new Dictionary<string, string>();
            string basePath = ConfigurationManager.AppSettings["picpath"];// @"D:\Program Files (x86)\Apache Software Foundation\Tomcat 7.0\webapps\pichouse\pic\pfile";
            PdfReader pdfReader = null;
            try
            {
                pdfReader = new PdfReader(pdfTemplate);
                AcroFields pdfFormFields = pdfReader.AcroFields;
                string name = string.Empty;//姓名
                string zkzh = string.Empty;//准考证号
                string kaochang = string.Empty;//考场
                string zhiyegongzhong = string.Empty;
                string jinengdengji = string.Empty;
                string zuoweihao = string.Empty;
                string identify = string.Empty;
                string workunit = string.Empty;
                string kstime = string.Empty;
                string ksaddress = string.Empty;
                string Image = string.Empty;
                string photopath = string.Empty;
                for (int i = 0; i < list.Count; ++i)
                {
                    //
                    name = string.Format("表单1[0].#subform[0].name{0}[0]", i + 1);
                    zkzh = string.Format("表单1[0].#subform[0].zkzh{0}[0]", i + 1);
                    kaochang = string.Format("表单1[0].#subform[0].kaochang{0}[0]", i + 1);
                    zhiyegongzhong = string.Format("表单1[0].#subform[0].zhiyegongzhong{0}[0]", i + 1);
                    jinengdengji = string.Format("表单1[0].#subform[0].jinengdengji{0}[0]", i + 1);
                    zuoweihao = string.Format("表单1[0].#subform[0].zuoweihao{0}[0]", i + 1);
                    identify = string.Format("表单1[0].#subform[0].identify{0}[0]", i + 1);
                    workunit = string.Format("表单1[0].#subform[0].workunit{0}[0]", i + 1);
                    kstime = string.Format("表单1[0].#subform[0].kstime{0}[0]", i + 1);
                    ksaddress = string.Format("表单1[0].#subform[0].ksaddress{0}[0]", i + 1);
                    Image = string.Format("表单1[0].#subform[0].Image{0}[0]", i + 1);

                    dic.Add(name, list[i].name);
                    dic.Add(zkzh, list[i].zkzh);
                    dic.Add(kaochang, list[i].kaochang);
                    dic.Add(zhiyegongzhong, list[i].zhiyegongzhong);
                    dic.Add(jinengdengji, list[i].jinengdengji);
                    dic.Add(zuoweihao, list[i].seat);
                    dic.Add(identify, list[i].identify);
                    dic.Add(workunit, list[i].workunit);
                    dic.Add(kstime, list[i].kstime);
                    dic.Add(ksaddress, list[i].ksaddress);
                    photopath = Path.Combine(basePath, list[i].photo);
                    dic.Add(Image, photopath);
                }
            }
            catch (Exception ex)
            {
                //LogHelper.Error(ex.Message);
            }
            finally
            {
                if (pdfReader != null)
                {
                    pdfReader.Close();
                }
            }
            return dic;
        }

　　2.填充pdf模板。。

/// <summary>
        /// 填充模板
        /// </summary>
        /// <param name="pdfTemplate">pdf模板的全路径</param>
        /// <param name="newFile">生成的pdf路径</param>
        /// <param name="dic"></param>
        public static void FillForm(string pdfTemplate, string newFile, Dictionary<string, string> dic)
        {
            PdfReader pdfReader = null;
            PdfStamper pdfStamper = null;
            try
            {
                pdfReader = new PdfReader(pdfTemplate);
                pdfStamper = new PdfStamper(pdfReader, new FileStream(
                 newFile, FileMode.Create));
                AcroFields pdfFormFields = pdfStamper.AcroFields;
                //设置支持中文字体
                BaseFont baseFont = BaseFont.CreateFont("C:\\WINDOWS\\FONTS\\STSONG.TTF", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
                pdfFormFields.AddSubstitutionFont(baseFont);
                foreach (KeyValuePair<string, string> de in dic)
                {
                    if (de.Key.Contains("Image"))
                    {
                        insertImage(pdfStamper, pdfFormFields, de.Key, de.Value);
                    }
                    else
                    {
                        pdfFormFields.SetField(de.Key, de.Value);
                    }

                }
                pdfStamper.FormFlattening = true;
            }
            catch (Exception ex)
            {
                //LogHelper.Error(ex.Message);
            }
            finally
            {
                if (pdfStamper != null)
                {
                    pdfStamper.Close();
                }
                if (pdfReader != null)
                {
                    pdfReader.Close();
                }
            }
        }

　　3.填充图片的方法

/// <summary>
        /// 填充图片
        /// </summary>
        /// <param name="ps"></param>
        /// <param name="s">域集合？</param>
        /// <param name="filedname">图片域的名称</param>
        public static void insertImage(PdfStamper ps, AcroFields s, string filedname, string imagefilename)
        {
            try
            {
                List<AcroFields.FieldPosition> list = (List<AcroFields.FieldPosition>)s.GetFieldPositions(filedname);
                Rectangle signRect = list[0].position;

                Image image = Image.GetInstance(imagefilename);
                PushbuttonField pushbuttonField = s.GetNewPushbuttonFromField(filedname);
                pushbuttonField.Image = (image);
                PdfFormField editFormField = pushbuttonField.Field;
                s.ReplacePushbuttonField(filedname, editFormField);

            }
            catch (Exception e)
            {
                // TODO Auto-generated catch block
            }
        }

　　合并PDF文件的方法

private string MergePDF(List<string> list)
        {
            string basePath = @"D:\fileserver\pdfzkz";
            string save_path = Path.Combine(basePath, "准考证.pdf");
            Document document = new Document();
            PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(save_path, FileMode.Create));
            document.Open();
            PdfContentByte cb = writer.DirectContent;
            PdfImportedPage newPage;
            PdfReader readert = null;
            List<PdfReader> readerList = new List<PdfReader>();
            for (int k = 0; k < list.Count; k++)
            {
                readert = new PdfReader(list[k]);
                document.NewPage();
                int iPageNum = readert.NumberOfPages;
                for (int j = 1; j <= iPageNum; j++)
                {
                    document.NewPage();
                    newPage = writer.GetImportedPage(readert, j);
                    cb.AddTemplate(newPage, 0, 0);
                }
                readerList.Add(readert);
            }
             try
            {
                if (document.IsOpen())
                {
                    document.Close();
                }
                foreach (var rd in readerList)//清理占用
                {
                    rd.Dispose();
                } 

            }
            catch(Exception ex)
            {
            }
             return save_path;
        }