iTextSharp生成PDF文件

这是一篇简单的教程，所以只涉及一些iTextSharp生成pdf的简单应用，详细教程请搜索iTextSharp进入官网看官方文档（英文版）。

iTextSharp官方文档：https://itextpdf.com/sites/default/files/2019-10/DITO%20Whitepaper%20v12-2_1.pdf

Demo下载地址（附iTextSharp.dll文件）：https://download.csdn.net/download/callmejeans/12068398

Demo主要代码如下:

 protected void ExportPDF(object sender, EventArgs e) {
            DataTable PDFDataTable = GetDataTable();
            PDFObj pdf = new PDFObj();
            pdf.PDFRemark = DateTime.Now.ToShortDateString();
            ConvertGrdiViewToPdf(PDFDataTable, pdf);

        }

        //初始值设定
        class PDFObj{
            //string fondpath = "C:\\Windows\\Fonts\\simsun.ttc,0";
            public string fondpath = @System.Web.HttpContext.Current.Server.MapPath("./Source/Fonts/simsun.ttc") + ",0";//字体设置
            public string PDFFilename = "TheSearchData";//文件标题
            public float fontsize = ;//主要内容字体大小
            public string PDFHeader = "员工信息表";//标题文字
            public float PDFHeaderFontSize = ;//标题字体大小
            public string PDFRemark;//备注文字
            public float PDFRemarkFontSize = ;//备注文字大小
        }

        //得到数据表
        private DataTable GetDataTable(){
            //新建PDFDemo DataTable
            DataTable dt=new DataTable("PDFDemo");
            DataColumn dc1=new DataColumn("UserID",Type.GetType("System.String"));
            DataColumn dc2=new DataColumn("UserName",Type.GetType("System.String"));
            DataColumn dc3=new DataColumn("Sex",Type.GetType("System.String"));
            DataColumn dc4=new DataColumn("Birth",Type.GetType("System.DateTime"));
            DataColumn dc5=new DataColumn("Nation",Type.GetType("System.String"));
            dt.Columns.Add(dc1);
            dt.Columns.Add(dc2);
            dt.Columns.Add(dc3);
            dt.Columns.Add(dc4);
            dt.Columns.Add(dc5);
            for(int i=;i<;i++)
            {
                DataRow dr=dt.NewRow();
                dr["UserID"]="No"+(+i).ToString();
                dr["UserName"]="张三"+i;
                dr["Sex"]="男";
                dr["Birth"] = System.DateTime.Now.ToString("yyyy-MM-dd");
                dr["Nation"]="China";
                dt.Rows.Add(dr);
            }
            return dt;
        }

        #region convertToPDF
        /// <summary>
        /// Demo1
        /// </summary>
        /// <param name="sourcedate"></param>
        /// <param name="PDFFileName"></param>
        /// <param name="FontPath"></param>
        /// <param name="FontSize"></param>
        /// <param name="PDFObj"></param>
        private static void ConvertGrdiViewToPdf(DataTable sourcedate, PDFObj PDFObj)
        {
            if (sourcedate != null)
            {
                string strFileName = PDFObj.PDFFilename + ".pdf";
                DataTable dtrn = new DataTable();
                int countColumns = sourcedate.Columns.Count;
                int countRows = sourcedate.Rows.Count;
                if (countColumns !=  && countRows != )
                {
                    Document document = new Document(PageSize.A4, , , , );
                    PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(HttpContext.Current.Server.MapPath(strFileName), FileMode.Create));
                    try
                    {
                        BaseFont baseFont = BaseFont.CreateFont(PDFObj.fondpath, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);

                        iTextSharp.text.Font font = new iTextSharp.text.Font(baseFont, PDFObj.fontsize);
                        document.Open();
                        writer.Open();
                        //添加表名
                        if (PDFObj.PDFHeader != null)
                        {
                            iTextSharp.text.Font headfont = new iTextSharp.text.Font(baseFont, PDFObj.PDFHeaderFontSize, Font.BOLD | Font.UNDERLINE, new iTextSharp.text.BaseColor(, , ));
                            Paragraph head = new Paragraph(PDFObj.PDFHeader, headfont);
                            head.SpacingAfter = ;//设置段后距离
                            head.Alignment = iTextSharp.text.Rectangle.ALIGN_CENTER;
                            document.Add(head);
                        }
                        //添加备注
                        if (PDFObj.PDFRemark != null)
                        {
                            iTextSharp.text.Font Remarkfont = new iTextSharp.text.Font(baseFont, PDFObj.PDFRemarkFontSize);
                            Paragraph Remark = new Paragraph(PDFObj.PDFRemark, Remarkfont);
                            Remark.SpacingAfter = ;//设置段后距离
                            Remark.IndentationRight = ;//设置右缩进
                            Remark.Alignment = iTextSharp.text.Rectangle.ALIGN_RIGHT;
                            document.Add(Remark);

                        }
                        PdfPTable table = new PdfPTable(countColumns);
                        table.DefaultCell.BackgroundColor = iTextSharp.text.BaseColor.LIGHT_GRAY;
                        for (int j = ; j < countColumns; j++)
                        {
                            table.AddCell(new Phrase(sourcedate.Columns[j].ColumnName, font));    // OK
                        }
                        table.HeaderRows = ;

                        table.DefaultCell.BackgroundColor = iTextSharp.text.BaseColor.WHITE;
                        for (int i = ; i < countRows; i++)
                        {
                            for (int j = ; j < countColumns; j++)
                            {
                                table.AddCell(new Phrase((sourcedate.Rows[i][j].ToString() == null || sourcedate.Rows[i][j].ToString() == "&nbsp;") ? "" : sourcedate.Rows[i][j].ToString(), font));
                            }
                        }
                        document.Add(table);
                    }
                    catch (Exception)
                    {
                        throw;
                    }
                    finally
                    {
                        document.Close();
                        writer.Close();
                    }
                    try
                    {
                        String FullFileName = System.Web.HttpContext.Current.Server.MapPath(strFileName);
                        FileInfo DownloadFile = new FileInfo(FullFileName);
                        System.Web.HttpContext.Current.Response.Clear();
                        System.Web.HttpContext.Current.Response.ClearHeaders();
                        System.Web.HttpContext.Current.Response.Buffer = false;
                        System.Web.HttpContext.Current.Response.ContentType = "application/octet-stream";
                        System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename="
                            + System.Web.HttpUtility.UrlEncode(DownloadFile.FullName, System.Text.Encoding.UTF8));
                        System.Web.HttpContext.Current.Response.AppendHeader("Content-Length", DownloadFile.Length.ToString());
                        System.Web.HttpContext.Current.Response.WriteFile(DownloadFile.FullName);
                    }
                    catch (Exception)
                    {
                        throw;
                    }
                    finally
                    {
                        System.Web.HttpContext.Current.Response.Flush();
                        System.Web.HttpContext.Current.Response.End();
                    }
                }
                else
                {
                    System.Web.HttpContext.Current.Response.Write
                        ("<script type='text/javascript'>alert('数据为空，不值得导出pdf！');</script>");
                }
            }
            else
            {
                System.Web.HttpContext.Current.Response.Write
                        ("<script type='text/javascript'>alert('数据为空，请查询后再导出！');</script>");
            }
        }