Repeater控件绑定问题
<asp:Repeater ID="repInfo" runat="server">
  <HeaderTemplate>
  <table width="98%" border="0" align="center" cellpadding="4" cellspacing="1" bgcolor="#FFFFFF" class="table">
  <tr class="TR_BG">
  <td align="left" valign="middle" class="sys_topBg">帮助</td>
  </tr>  
  </HeaderTemplate>
  <ItemTemplate>
  <tr class="TR_BG_list" onmouseover="overColor(this)" onmouseout="outColor(this)" ContentTypeStr='5' ContentID='<%# Eval("P_ID") %>'>
  <td align="left" valign="middle"><a href="<%#((DataRowView)Container.DataItem)["P_EquHelp"]%>">帮助 </a></td>
  </ItemTemplate>
  <FooterTemplate>
  </table>
  </FooterTemplate>
</asp:Repeater>
想让当读取P_EquHelp的值为空的时候让<a>的href属性为#,不为空的时候赋值为所读取的值，请高手帮忙

------解决方案--------------------
<a href='<%#string.IsNullOrEmpty(Eval("P_EquHelp").ToString())?"#":Eval("P_EquHelp")%>'>帮助 </a>