C#使用iTextSharp生成PDF的示例代码

/// <summary>
        /// 生成 pdf 文件
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="casedetailsviewmodels">数据list</param>
        /// <param name="targetpath">目标文件路径</param>
        /// <param name="newfilename">文件名</param>
        /// <returns></returns>
        private static string createpdf(viewmodel model, list<detailsviewmodel> detailsviewmodels, string targetpath, string newfilename)
        {
            string outmergefile = targetpath + newfilename;
 
            if (directory.exists(outmergefile))
            {
                directory.delete(outmergefile);
            }
            var pagesize = pagesize.a4;
            itextsharp.text.document document = new itextsharp.text.document(pagesize);
            pdfwriter writer = pdfwriter.getinstance(document, new filestream(outmergefile, filemode.create));
            try
            {
                document.open();
 
                #region 字体
                font bf_light = fontfactory.getfont(@"c:\windows\fonts\simsun.ttc,0", basefont.identity_h, basefont.embedded);
 
                font bigtitle_light = fontfactory.getfont(@"c:\windows\fonts\simsun.ttc,0", basefont.identity_h, basefont.embedded);
                bigtitle_light.size = 20;
 
                font title_light = fontfactory.getfont(@"c:\windows\fonts\simsun.ttc,0", basefont.identity_h, basefont.embedded);
                title_light.setcolor(0, 0, 255);
                title_light.size = 16;
 
                font body_light = fontfactory.getfont(@"c:\windows\fonts\simsun.ttc,0", basefont.identity_h, basefont.embedded);
                body_light.size = 12;
                //var titlefont = getfont();
                //titlefont.setstyle(font.bold);
                //titlefont.color = basecolor.black;
                //titlefont.size = 16;
                //new font(basefont2, 20f) 
                #endregion
 
                //第一页
                //段落 大标题
                #region 大标题
                var titleparagraph = new paragraph(new phrase(model.titlemodel.f_contentstr, bigtitle_light));
                float x = 300;
                float y = document.pagesize.height / 2;
                columntext.showtextaligned(writer.directcontent, element.align_center, titleparagraph, x, y, 0);
                #endregion
 
                //第二页
                #region 增加目录页
                document.newpage();
                var cataloguep = new paragraph(new phrase("目录", body_light));
                //cataloguep.indentationleft = 160;
                //document.add(cataloguep);
                //页头显示的位置
                columntext.showtextaligned(writer.directcontent, element.align_center, cataloguep, document.pagesize.width / 2, document.top, 0);
                foreach (var item in model.twotitlelist)
                {
                    chunk leader = new chunk(new dottedlineseparator(), 400);//400
                    var f_contentstrtxt = item.f_contentstr.trim();
                    paragraph pp = new paragraph(new phrase("    " + f_contentstrtxt, bf_light));
                    pp.add(leader);
                    pp.add(new phrase(!string.isnullorempty(item.f_page) ? item.f_page : "1～1", bf_light));
                    document.add(pp);
                }
                #endregion
                //正文
                //第三页
                #region 正文
                int ipagenum = 3;
                int beginpagenum = 3;
                basefont basefont2 = basefont.createfont(@"c:\windows\fonts\simsun.ttc,0", basefont.identity_h, basefont.not_embedded);
                document.newpage();
                foreach (var item in model.twotitlelist)
                {
                    ipagenum = writer.pagenumber;
                    //标题
                    document.add(new paragraph(new phrase(item.f_contentstr, title_light)));
                    foreach (var itemthree in item.threecontentlist)
                    {
                        itemthree.f_contentstr = itemthree.f_contentstr.replace("\r\n", string.empty);
                        //内容
                        if (itemthree.f_contentstr.contains("</p>"))
                        {
                            var contentstr = itemthree.f_contentstr.replace("<p>", string.empty);
                            var contentlist = contentstr.split("</p>");
                            foreach (var itemcon in contentlist)
                            {
                                var itemcontxt = itemcon.replace("\n", string.empty).trim();
                                var bydyphrase = new paragraph(new phrase("    " + itemcontxt, body_light));
                                document.add(bydyphrase);
                                if (writer.pagenumber > ipagenum)
                                {
                                    writepagenumber(document, writer, bf_light);
                                }
                            }
                        }
                        else
                        {
                            var txt = itemthree.f_contentstr.replace("\n", string.empty).trim();
                            document.add(new paragraph(new phrase("    " + txt, body_light)));
                        }
                    }
                    //if (writer.pagenumber > ipagenum)
                    //{
                    item.f_page = string.format("{0}～{1}", ipagenum, writer.pagenumber);
                    ipagenum = writer.pagenumber;
                    //}
                }
                #endregion
 
                #region 附件
                if (model.filelist != null && model.filelist.count > 0)
                {
                    var bydyphrase1 = new paragraph(new phrase("    （一）检索结果分析列表", body_light));
                    document.add(bydyphrase1);
                    document.add(new paragraph(new phrase("  ")));
 
                    int groupnum = 1;
                    foreach (var item in model.filelist)
                    {
                        var keywordtxt = item.keyword.replace("\n", string.empty).trim();
                        var bydyphrase = new paragraph(new phrase("    " + keywordtxt, body_light));
                        document.add(bydyphrase);
                        document.add(new paragraph(new phrase("  ")));
 
                        pdfptable table = new pdfptable(4);
                        int[] widths = { 40, 20, 20, 20 };
                        table.setwidths(widths);//设置每列的宽度（求和百分比5,10=1,2）
                                                //为pdfptable的构造函数传入整数3，pdfptable被初始化为一个三列的表格
                                                //pdfpcell cell = new pdfpcell(new phrase("第一行 跨3列", bf_light));
                                                //cell.colspan = 6;//跨3列
 
                        //0=left, 1=centre, 2=right
                        //table.addcell(cell);
                        pdfpcell cell = new pdfpcell(new phrase("标题", bf_light));
                        cell.horizontalalignment = 1;
                        table.addcell(cell);
 
                        pdfpcell cel2 = new pdfpcell(new phrase("案号", bf_light));
                        cel2.horizontalalignment = 1;
                        table.addcell(cel2);
 
                        pdfpcell cel3 = new pdfpcell(new phrase("是否加入检索报告", bf_light));
                        cel3.horizontalalignment = 1;
                        table.addcell(cel3);
 
                        pdfpcell cel4 = new pdfpcell(new phrase("未加入检索报告原因", bf_light));
                        cel4.horizontalalignment = 1;
                        table.addcell(cel4);
                        foreach (var itemkey in item.keywordfilelist)
                        {
                            table.addcell(new phrase(itemkey.f_casetitle, bf_light));
                            table.addcell(new phrase(itemkey.f_casecode.tostring(), bf_light));
                            table.addcell(new phrase(itemkey.f_isadd ? "是" : "否", bf_light));
                            table.addcell(new phrase(itemkey.f_noaddcause, bf_light));
                            groupnum++;
                        }
                        document.add(table);
                    }
                }
                #endregion
 
                #region 生成案例
                if (casedetailsviewmodels != null && casedetailsviewmodels.count > 0)
                {
                    var bydyphrase2 = new paragraph(new phrase("    （二）检索案例全文", body_light));
                    document.add(bydyphrase2);
                    document.add(new paragraph(new phrase("  ")));
 
                    foreach (var item in casedetailsviewmodels)
                    {
                        foreach (var itemcase in item.caseitemlist)
                        {
                            //标题
                            itemcase.f_title = itemcase.f_title.replace("\r\n", string.empty);
                            var f_titletxt = itemcase.f_title.trim();
                            document.add(new paragraph(new phrase("  " + f_titletxt, body_light)));
 
                            //内容
                            itemcase.f_content = itemcase.f_content.replace("\r\n", string.empty);
                            if (itemcase.f_content.contains("</p>"))
                            {
                                var contentstr = itemcase.f_content.replace("<p>", string.empty);
                                var contentlist = contentstr.split("</p>");
                                foreach (var itemcon in contentlist)
                                {
                                    var itemcontxt = itemcon.replace("\n", string.empty).trim();
                                    var bydyphrase = new paragraph(new phrase("  " + itemcontxt, body_light));
                                    document.add(bydyphrase);
                                    if (writer.pagenumber > ipagenum)
                                    {
                                        writepagenumber(document, writer, bf_light);
                                    }
                                }
                            }
                            else
                            {
                                var f_contenttxt = itemcase.f_content.replace("\n", string.empty).trim();
                                document.add(new paragraph(new phrase("  " + f_contenttxt, body_light)));
                            }
                        }
                    }
                }
                #endregion
            }
            catch (exception ex)
            {
                logfactory.getlogger("createreportdetailspdfcatalogue").info("createreportdetailspdfcatalogue 报错" + ex.message);
            }
            finally
            {
                if (document != null)
                {
                    document.close();
                }
                if (writer != null)
                {
                    writer.close();
                }
            }
            return outmergefile;
        }
 
        /// <summary>
        /// 写页码
        /// </summary>
        /// <param name="document"></param>
        /// <param name="writer"></param>
        /// <param name="bf_light"></param>
        private static void writepagenumber(itextsharp.text.document document, pdfwriter writer, font bf_light)
        {
            phrase header = new phrase("第" + (writer.pagenumber).tostring() + "页", bf_light);// - 1
                                                                                             //页脚显示的位置
            columntext.showtextaligned(writer.directcontent, element.align_center, header, document.pagesize.width / 2, document.bottom, 0);
        }

var filenametemppath = createpdf(model, null, uploadpath, filenametemp);
var savepath = createpdf(model, casedetailsviewmodels, uploadpath, filename);