asp.net - Add multiple dynamic classes to LinkButton in a ListView -

i trying add multiple classes linkbutton in listview.

this works:

<asp:linkbutton id="lbattendee" runat="server" cssclass='checkedintrue attendee'> 

and works:

<asp:linkbutton id="lbattendee" runat="server" cssclass='<%#eval("checkedin") %>'> 

but does not

<asp:linkbutton id="lbattendee" runat="server" cssclass='checkedin<%#eval("checkedin") %> attendee'> 

when 3rd way, class rendered literally, this:

<a id="lvattendees_ctrl1_lbattendee" class="checkedin<%#eval("checkedin") %> attendee" href="javascript:__dopostback('lvattendees$ctrl1$lbattendee','')">             <span style="display:none;">2</span>                 <p class="studentname">joseph conrad</p>                 <p class="studentid">13526861</p>             </a> 

try it's work me

<a id="lvattendees_ctrl1_lbattendee" class='<%# string.format("checkedin {0} attendee", eval("checkedin")) %>' href="javascript:__dopostback('lvattendees$ctrl1$lbattendee','')">                 <span style="display:none;">2</span>                     <p class="studentname">joseph conrad</p>                     <p class="studentid">13526861</p>                 </a>