Asp.net: conditional loading of user controls fails -

hello (sorry poor title)

i have user control loads different additional user controls based on conditions this:

<%@ control language="c#" autoeventwireup="true" codefile="subpage.ascx.cs" inherits="subpage" %> <%@ register src="<srca>" tagname="a" tagprefix="ctrl" %> <%@ register src=">srcb>" tagname="b" tagprefix="ctrl" %>  <% if (somevalue == 1) { %>     loading user control a..     <ctrl:a runat="server" /> <% } else { %>     loading user control b..     <ctrl:b runat="server" /> <% } %> 

the result correct; expected content displayed. noticed though somevalue != 1 , control b displayed, control still loaded behind scenes (page load called).

why this? , better approach? thanks.

page_load called because handle event. don't try load them in way use visible-property instead codebehind.

expose public function controller(in case subpage.ascx) calls after changed visible state load content of usercontrol. controls aren't visible won't rendered html @ all.

loading controls dynamically if don't need can cause unnecessary viewstate- or event-handling issues. here other disadvantages mentioned regarding dynamic usercontrols.