一个N小的问题,麻烦心目中高手解决
ASPX文件
<table   style= "width:   725px "   cellpadding= "0 "   cellspacing= "0 ">
<tr>
<td   colspan= "2 "   style= "height:15px "> </td>
</tr>
<tr>
<td   colspan= "2 "   style= "height:35px "> <img   src= "images/p_product.gif "   width= "725 "   height= "35 "   /> </td>
</tr>
<tr>
<td   colspan= "2 "   style= "height:5px "> </td>
</tr>
<tr>
<td   style= "height:30px;width:325px; "> 产品名称： <asp:Label   id= "ProductName "   runat= "server "> </asp:Label> </td>
<td   style= "height:30px;width:400px "> 产品编号： <asp:Label   id= "ProductType "   runat= "server "> </asp:Label> </td>
</tr>
<tr>
<td   style= "height:30px;width:325px "> 产品类型： <asp:Label   id= "ProductClass "   runat= "server "> </asp:Label> </td>
<td   style= "height:30px;width:400px "> PDF详细资料： </td>
</tr>
<tr>
<td   colspan= "2 "   style= "height:450px;text-align:center; "   valign= "middle "> <asp:Image   id= "ProductImg "   runat= "server "> </asp:Image> </td>
</tr>
<tr>
<td   style= "height:5px "> </td>
<td> </td>
</tr>
</table>


CS文件
private   void   bindNews(string   ProductID)
{
                        string   selSql   =   "select   *   from   YZProduct   where   ProductID= "   +   Request.QueryString[ "ProductID "].ToString();
OleDbConnection   conn=new   OleDbConnection(connStr);
OleDbCommand     selCmd=new   OleDbCommand(selSql,conn);
OleDbDataReader   sdr;
try
{
conn.Open   ();
sdr=selCmd.ExecuteReader   ();
while(sdr.Read   ())
{
this.ProductType   .Text   =sdr[ "ProductType "].ToString   ();
this.ProductName   .Text   =sdr[ "ProductName "].ToString   ();
this.ProductClass   .Text   =sdr[ "ProductClass "].ToString   ();
this.ProductImg.ImageUrl   =sdr[ "ProductImg "].ToString   ();
}
}
catch(System.Exception   ex)
{
throw   new   Exception   (ex.Message   );
}
finally
{
conn.Close   ();
}
}


数据库表格
productPDF     里面数据是:http://www.hpwangaga/pdf/120.pdf

请问怎么在     PDF详细资料：实现下载功能


------解决方案--------------------
while(sdr.Read ())
{
this.ProductType .Text =sdr[ "ProductType "].ToString ();
this.ProductName .Text =sdr[ "ProductName "].ToString ();
this.ProductClass .Text =sdr[ "ProductClass "].ToString ();
this.Pro