Repeaterは、データレコードがない場合に「関連レコードなし...」を表示します.

<table class="r_line" cellpadding="3" cellspacing="1" width="100%">
    <tr class="r_title">
        <td>  </td>
    </tr>
<asp:Repeater ID="rptRecord" runat="server">
    <ItemTemplate>
        <tr style='background-color:<%#(Container.ItemIndex%2==0)?"#fff":"#eee"%>'>
            <td><a href='Detail.aspx?PID=<%=Request.QueryString["PID"] %>&did=<%#Eval("PID") %>'><%#Eval("PID") %></a></td>
        </tr>
    </ItemTemplate>
    <FooterTemplate>   
        <tr class="r_bg">
            <td>
<asp:Label ID="lblEmpty" Text="   .." runat="server"  Visible='<%#bool.Parse((rptRecord.Items.Count==0).ToString())%>'></asp:Label> 
                </td>
            </tr>
    </FooterTemplate>  
</asp:Repeater>
</table>

   <FooterTemplate>
                    <%
                        if (rptComunicateList_Untreated.Items.Count == 0)
                    { %>
                    <div class='infor-block' style='text-align: center; color: #999999;'>
                        <p>
                                   ！
                        </p>
                    </div>
                      <%}%>
                </FooterTemplate>