i have an anchor tag inside gridview to open pdf file but the link is not working its not opening file

See more:

C#

ASP.NET

HTML

i have an anchor tag inside gridview to open pdf file but the link is not working its not opening file

my code is:

<asp:gridview id="gvRpt" runat="server" autogeneratecolumns="false" width="99%" borderstyle="None"
           borderwidth="1px" cellpadding="2" cssclass="mGrid" allowpaging="true" pagesize="10"
           style="margin-top: 0px" onpageindexchanging="gvRpt_PageIndexChanging" onrowdatabound="gvRpt_RowDataBound">
           <columns>
               <asp:templatefield headertext="Sr. No." headerstyle-wrap="false">
                   <itemtemplate>
                       <%#Container.DataItemIndex+1 %>
                   </itemtemplate>
                   <itemstyle cssclass="GridDataC" wrap="false"></itemstyle>
               </asp:templatefield>
               <asp:boundfield datafield="BankName" headertext="Bank Name">
                   <itemstyle cssclass="GridDataL"></itemstyle>
               </asp:boundfield>
               <asp:boundfield datafield="BankCode" headertext="Bank Code">
                   <itemstyle cssclass="GridDataC"></itemstyle>
               </asp:boundfield>
               <asp:boundfield datafield="FileName" headertext="File Name">
                   <itemstyle cssclass="GridDataL"></itemstyle>
               </asp:boundfield>
               <asp:templatefield headertext="Download">
                   <itemtemplate>
                       <b><a id="lnkDownload" target="_blank" href="D:/Lubna/ReportGeneration_WinApp/ReportGeneration_WinApp/DownloadPDF/HDF/HDFReport_27Aug2014_051145.pdf" runat="server" >Download</a></b>
                   </itemtemplate>
                   <itemstyle cssclass="GridDataC" wrap="false"></itemstyle>
               </asp:templatefield>
               <asp:boundfield datafield="Statusdesc" headertext="Status" />
               <asp:boundfield datafield="CreatedDate" headertext="Created Date" dataformatstring="{0:dd-MMM-yyyy}" />
           </columns>
       </asp:gridview>

when I click on download it doesn't open file. file name and location is proper I have tested it even with simple html page with only anchor tag it is working fine in html page. is there issue with gridview ?? please help me how to open pdf file from anchor tag which is inside gridview.

Thanks in advance.