How to avoid updating SELECT from dropdown list into db

Question

Hi,

 

I have a dropdownlist in grid

    

<asp:DropDownList ID="ddlstatus" runat="server">

<asp:ListItem>Select</asp:ListItem>

<asp:ListItem>Approved</asp:ListItem>

<asp:ListItem>Reject</asp:ListItem>

</asp:DropDownList>

 

During update if i wont select any value , first value i.e. Select is getting update into db. which should not happen

 

How to avoid this in c#?