导入的ItextSharp.dll一定要是较高的版本

数据库表结构

生成的PDF样式

代码：

namespace WebPDF{    public partial class _Default : System.Web.UI.Page    {       /// 
       /// 初始化加载数据       /// 
       ///        ///         protected void Page_Load(object sender, EventArgs e)        {            if (!IsPostBack)            {                ImportPdf();            }        }        #region 绑定数据        /// 
        /// 绑定数据        /// 
        /// 
           public DataTable BindData()     {         string connection = "Data Source = orcl;Persist Security Info=True;User ID=scott;Password=123;Unicode=True";                 string oracleSql = "select * from EMP";         using (OracleConnection con = new OracleConnection(connection))  //建立数据库链接           {             con.Open();             using (OracleCommand cmd = con.CreateCommand())            {                cmd.CommandText = oracleSql;                DataSet ds = new DataSet();                OracleDataAdapter da = new OracleDataAdapter(cmd);                 da.Fill(ds);                if (ds == null || ds.Tables.Count <= 0 || ds.Tables[0].Rows.Count <= 0)                {                    return new DataTable();                 }                 return ds.Tables[0];            }        }    }     #endregion      #region 数据格式化        /// 
        /// 导出PDF格式        /// 
     public void ImportPdf()     {         DataTable dt = BindData();         GridView1.DataSource = dt;         GridView1.DataBind();         DataTable newdt = new DataTable();        newdt.Columns.Add("编号", typeof(string));         newdt.Columns.Add("名称", typeof(string));         newdt.Columns.Add("职业", typeof(string));          newdt.Columns.Add("薪资", typeof(string));         newdt.Columns.Add("日期", typeof(string));        newdt.Columns.Add("单价", typeof(string));          newdt.Columns.Add("金额", typeof(string));         newdt.Columns.Add("部门号", typeof(string));         decimal deci = 0.00M;         for (int i = 0; i < dt.Rows.Count; i++)         {             DataRow dr = newdt.NewRow();             dr["编号"] = dt.Rows[i]["EMPNO"].ToString();             dr["名称"] = dt.Rows[i]["ENAME"].ToString();             dr["职业"] = dt.Rows[i]["JOB"].ToString();             dr["薪资"] = dt.Rows[i]["MGR"].ToString();             dr["日期"] = dt.Rows[i]["HIREDATE"].ToString();             dr["单价"] = dt.Rows[i]["SAL"].ToString();             dr["金额"] = dt.Rows[i]["COMM"].ToString();             dr["部门号"] = dt.Rows[i]["DEPTNO"].ToString();             deci = deci + Decimal.Parse(dt.Rows[i]["COMM"].ToString());             newdt.Rows.Add(dr);          }         CreatePdf(newdt, deci, "国土资源局");     }    #endregion         /// 
        /// 创建PDF文档        /// 
        /// table     /// 合计金额        /// 组部名称副标题     public void CreatePdf(DataTable dt, decimal COMM, string departmentName)    {         //初始化一个目标文档类        Document document = new Document(PageSize.A4, 5, 5, 20, 20);        //调用PDF的写入方法流        //注意FileMode-Create表示如果目标文件不存在，则创建，如果已存在，则覆盖。         PdfWriter writer = PdfWriter.GetInstance(document, new System.IO.FileStream(HttpContext.Current.Server.MapPath("pdfsample.pdf"), System.IO.FileMode.Create));         //表格列字体       BaseFont bfChinese = BaseFont.CreateFont(@"C:\WINDOWS\Fonts\simsun.ttc,1", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);         Font fontChinese1 = new Font(bfChinese, 10);         Font ftitle = new Font(bfChinese, 16, Font.NORMAL, BaseColor.BLACK);         Font fontRukuHeader = new Font(bfChinese, 14, Font.NORMAL, BaseColor.BLACK);         Font footerChinese = new Font(bfChinese, 12, Font.NORMAL, BaseColor.BLACK);        //打开文档         document.Open();         PdfPTable table = new PdfPTable(dt.Columns.Count + 1);       //设置标题         Paragraph title = new Paragraph("中国信息部", ftitle);         title.Alignment = Element.ALIGN_CENTER;//居中         document.Add(title);         //组部标题         PdfPCell middleCell = new PdfPCell(new Phrase(departmentName + "信息库", fontRukuHeader));         middleCell.Colspan = 6;         middleCell.HorizontalAlignment = PdfPCell.ALIGN_RIGHT;         middleCell.PaddingRight = 6;         middleCell.PaddingTop = 6;         middleCell.PaddingBottom = 4;         middleCell.BorderWidthBottom = 0;         middleCell.BorderWidthLeft = 0;         middleCell.BorderWidthRight = 0;         middleCell.BorderWidthTop = 0;         table.AddCell(middleCell);        //序号         PdfPCell cellNumber = new PdfPCell(new Phrase("第" + DateTime.Now.ToString("yyyyMMddhhmmss") + "号", footerChinese));         cellNumber.Colspan = 3;         cellNumber.PaddingRight = 6;          cellNumber.HorizontalAlignment = PdfPCell.ALIGN_LEFT;         cellNumber.BorderWidthTop = 0;          cellNumber.BorderWidthRight = 0;          cellNumber.BorderWidthBottom = 0;        cellNumber.BorderWidthLeft = 0;         table.AddCell(cellNumber);        //类别         PdfPCell headerleftCell = new PdfPCell(new Phrase("类别", footerChinese));        headerleftCell.Colspan = 4;         headerleftCell.BorderWidthLeft = 0;         headerleftCell.BorderWidthRight = 0;         headerleftCell.BorderWidthTop = 0;        headerleftCell.PaddingBottom = 4;         headerleftCell.HorizontalAlignment = 0;        headerleftCell.BorderWidth = 0;         table.AddCell(headerleftCell);          PdfPCell headerMiddleCell = new PdfPCell(new Phrase(DateTime.Now.ToString("yyyy年MM月dd日"), footerChinese));        headerMiddleCell.Colspan = 5;         headerMiddleCell.HorizontalAlignment = 0;        headerMiddleCell.BorderWidthTop = 0;         headerMiddleCell.BorderWidthRight = 0;         headerMiddleCell.BorderWidthLeft = 0;        headerMiddleCell.PaddingBottom = 4;         headerMiddleCell.BorderWidth = 0;         table.AddCell(headerMiddleCell);         table.DefaultCell.HorizontalAlignment = PdfPCell.ALIGN_LEFT;         table.DefaultCell.HorizontalAlignment = PdfPCell.ALIGN_CENTER;         table.DefaultCell.VerticalAlignment = PdfPCell.ALIGN_MIDDLE;        table.WidthPercentage = 100;         for (int i = 0; i < dt.Columns.Count; i++)         {             table.AddCell(new Phrase(dt.Columns[i].ColumnName, footerChinese));         }         PdfPCell cell = new PdfPCell(new Phrase("此\n联\n交\n资\n源\n部", fontChinese1));         cell.HorizontalAlignment = PdfPCell.ALIGN_LEFT;         cell.VerticalAlignment = PdfPCell.ANNOTATION;         cell.BorderWidth = 0;         cell.Colspan = 1;//合并一列         cell.Rowspan = 3 + dt.Rows.Count; //合并行         table.AddCell(cell);        table.DefaultCell.HorizontalAlignment = PdfPCell.ALIGN_CENTER;         for (int i = 0; i < dt.Rows.Count; i++)         {             for (int j = 0; j < dt.Columns.Count; j++)             {                 table.AddCell(new Phrase(dt.Rows[i][j].ToString(), footerChinese));             }         }        //合计一列单元格         PdfPCell lastcell = new PdfPCell(new Phrase("   合   计   ", footerChinese));         lastcell.Colspan = 2;//合并两列         lastcell.HorizontalAlignment = PdfPCell.ALIGN_CENTER;        table.AddCell(lastcell);       //第二单元格         lastcell = new PdfPCell(new Phrase("", footerChinese));         table.AddCell(lastcell);         //第三单元格         lastcell = new PdfPCell(new Phrase("", footerChinese));        table.AddCell(lastcell);        //第四单元格         lastcell = new PdfPCell(new Phrase("", footerChinese));         table.AddCell(lastcell);         //第五单元格        lastcell = new PdfPCell(new Phrase("", footerChinese));         table.AddCell(lastcell);         //第六单元格一列属于 合计值信息         lastcell = new PdfPCell(new Phrase(COMM.ToString(), footerChinese));        lastcell.HorizontalAlignment = PdfPCell.ALIGN_CENTER;        table.AddCell(lastcell);        //第七单元格         lastcell = new PdfPCell(new Phrase("", footerChinese));        table.AddCell(lastcell);        //底部单元格信息 部门        PdfPCell footerCell = new PdfPCell(new Phrase("部门负责人", footerChinese));        footerCell.Colspan = 2;//合并两列        footerCell.PaddingLeft = 4;         footerCell.HorizontalAlignment = PdfPCell.ALIGN_LEFT;         table.AddCell(footerCell);         //底部单元格信息 记账        footerCell = new PdfPCell(new Phrase("记账", footerChinese));        footerCell.Colspan = 2;         footerCell.HorizontalAlignment = PdfPCell.ALIGN_LEFT;         table.AddCell(footerCell);         //底部单元格信息 信管人员         footerCell = new PdfPCell(new Phrase("信管人员", footerChinese));         footerCell.Colspan = 4;//合并四列         footerCell.HorizontalAlignment = PdfPCell.ALIGN_LEFT;         table.AddCell(footerCell);         document.Add(table);//文档填充表格信息         document.Close();//关闭文档         //定义一个存储路径的文档名         string fullFileName = System.Web.HttpContext.Current.Server.MapPath("pdfsample.pdf");         Byte[] btArray = WriteToPdf(fullFileName, DateTime.Now.ToString("yyyyMMddhhmmss"), bfChinese);         fullFileName = Server.MapPath("pdfsample.pdf");         FileStream fs = new FileStream(fullFileName, FileMode.Create, FileAccess.Write);         fs.Write(btArray, 0, btArray.Length);         fs.Flush();         fs.Close();         fullFileName = Server.MapPath("pdfsample.pdf");         FileInfo downloadFile = new FileInfo(fullFileName);         Response.Clear();         Response.ClearHeaders();         Response.Buffer = false;         Response.ContentType = "application/octet-stream";        Response.AppendHeader("Content-Disposition", "attachment;filename=pdfsample.pdf");         Response.AppendHeader("Content-Length", downloadFile.Length.ToString()); System.Web.HttpContext.Current.Response.WriteFile(downloadFile.FullName);         Response.WriteFile(downloadFile.FullName);         Response.Flush();         Response.End();     }     /// 
     /// 写入pdf文档     /// 
     ///      ///      ///      /// 
           public static byte[] WriteToPdf(string sourceFile, string stringToWriteToPdf, BaseFont bfChinese)     {         PdfReader reader = new PdfReader(sourceFile);         using (MemoryStream stream = new MemoryStream())         {             PdfStamper pdfstamper = new PdfStamper(reader, stream);             for (int i = 1; i <= reader.NumberOfPages; i++)             {                 Rectangle pageSize = reader.GetPageSizeWithRotation(i);                 PdfContentByte pdfpageContents = pdfstamper.GetUnderContent(i);                 pdfpageContents.BeginText();                 pdfpageContents.SetFontAndSize(bfChinese, 40);                 pdfpageContents.SetRGBColorFill(192, 192, 192);                float textAngle = 45.0f;                 pdfpageContents.ShowTextAligned(PdfContentByte.ALIGN_CENTER, stringToWriteToPdf, pageSize.Width / 2, pageSize.Height / 2, textAngle);                 pdfpageContents.EndText();             }            pdfstamper.FormFlattening = true;            pdfstamper.Close();             reader.Close();             return stream.ToArray();         }    }    }}