datalist DataKeys[]

    protected void DL_URUNLER_EditCommand(object source, DataListCommandEventArgs e)
    {
        string id = DL_URUNLER.DataKeys[e.Item.ItemIndex].ToString();
        DBIslem.ParametreliDt("DELETE TBL_URUNLER WHERE ID=@Deger", id);
    }

<asp:DataList ID="DL_URUNLER" runat="server" Width="100%" oneditcommand="DL_URUNLER_EditCommand" DataKeyField="ID">