show error when datalist is empty

hi

I have datalist in product.aspx page that bind from database

and there is Repeater that bind from database... when I click on item from repeater it  bind datalist...

and I define Label =LBLerrorS  that when there isn't any data in database it show this message="There isn't any Product"

below are code

    <asp:Label ID="LBLerrorS" runat="server"  CssClass="lblerrorS" Text="there isn't any product ." Visible="false"></asp:Label>

 <asp:Repeater ID="RptWood" runat="server"   >
                                            <ItemTemplate>
                                                <li>
                                                <a href='<%#"House.aspx?subset="+Eval("subset")+"&ID="+Eval("ID")+"&ListType="+(DataList1.Visible == true ? "Product" : "Store")%>'>
                                             
                                                    <%#Eval("subset")%></a> </li>
                                            </ItemTemplate>

                                      
                                        </asp:Repeater>

if (Request.QueryString["ID"] != null)
            {
                if (Request.QueryString["ListType"] == "Store")
                {
                    this.GetCustomersPageWiseStore(1);
                    LBLerrorS.Visible = false;
                }
                else
                {
                    this.GetCustomersPageWise(1);
                    LBLerrorS.Visible = true;
                   
                }
            }

in above code I put LBLerrorS.visible=true  in else condition...

problem is that whenever I select item from repeater it show lblerrors but I want it just show lblerrorS just when there isn't any data in database

actually I want when datalist is empty it show error ....

HOw I can do it?

Best Regards

NEDA