Show date in yyyy/MM/dd format in GridView in ASP.Net

hi

there is gridview in page that bind from database and it will show date

<asp:TemplateField ItemStyle-Width="101px" ItemStyle-HorizontalAlign="Center" ItemStyle-VerticalAlign="Middle">
    <ItemTemplate>
         <asp:Label ID="Label11" runat="server" CssClass="lbldateS" Text='<%#toPersianNumber(Eval("sendDate").ToString())%>'></asp:Label>
    </ItemTemplate>
</asp:TemplateField>                           

here it shows date like:

8/10/1395 AM 12:00:00

I want it show like

1395/8/10

yyyy/mm/dd and doesn't show time...

Best regards

neda