1.前台页面上：

<div><asp:TextBox ID="TextBox1"runat="server"></asp:TextBox><asp:Button ID="Button1"runat="server"OnClick="Button1_Click"Text="导出"/></div>

2.后台代码：

usingSystem;usingSystem.Data;usingSystem.Configuration;usingSystem.Web;usingSystem.Web.Security;usingSystem.Web.UI;usingSystem.Web.UI.WebControls;usingSystem.Web.UI.WebControls.WebParts;usingSystem.Web.UI.HtmlControls;usingiTextSharp;usingiTextSharp.text;usingiTextSharp.text.pdf;usingSystem.IO;publicpartialclass_Default : System.Web.UI.Page 
{staticDataTable datatable=newDataTable("testpdf");protectedvoidPage_Load(objectsender, EventArgs e)
   {if(!Page.IsPostBack)
        {
         DataRow dr;//建立Column例，可以指明例的类型,这里用的是默认的stringdatatable.Columns.Add(newDataColumn("呵呵"));
        datatable.Columns.Add(newDataColumn("哈哈"));for(inti=1; i<5; i++)
       {
            dr=datatable.NewRow();
            dr[0]=System.Convert.ToString(i);
            dr[1]="红叶锁清秋"+System.Convert.ToString(i);
            datatable.Rows.Add(dr);
        }
        }
        
        
    }protectedvoidButton1_Click(objectsender, EventArgs e)
    {try{
            Document document=newDocument();
            PdfWriter.GetInstance(document,newFileStream(Server.MapPath("Chap0107.pdf"), FileMode.Create));
                        document.Open();
            BaseFont bfChinese=BaseFont.CreateFont("C:\\WINDOWS\\Fonts\\simsun.ttc,1", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
            Font fontChinese=newFont(bfChinese,12, Font.NORMAL,newColor(0,0,0));

document.Add(newParagraph(this.TextBox1.Text.ToString(), fontChinese));//iTextSharp.text.Image jpeg = iTextSharp.text.Image.GetInstance(Server.MapPath("pic015.jpg"));//document.Add(jpeg);PdfPTable table=newPdfPTable(datatable.Columns.Count);for(inti=0; i<datatable.Rows.Count; i++)
         {for(intj=0; j<datatable.Columns.Count; j++)
              {
                    table.AddCell(newPhrase(datatable.Rows[i][j].ToString(), fontChinese));
                }
            }
            document.Add(table);

document.Close();
        }catch(DocumentException de)
     {
            Response.Write(de.ToString());
        }
    }
}