wpf - Use checkbox as togglebutton in expander -

im quite new wpf , have following problem.

i need create list (i using listbox) of items can expanded (expander). problem is, can expanded, if have been 'selected'. each listboxitem should have checkbox , text.

so basic example illustrate mean:

<listbox> <item>(checkbox) john doe</item> <item>(checkbox) mike murray</item> </listbox> 

if (so multiple allowed) of checkboxes in listbox checked, item expands showing more data.

again example:

<listbox> <item>    (checkbox-checked) john doe    data shown in expanded area </item> <item>    (checkbox-unchecked) mike murray</item> </listbox> 

i cant expander use checkbox 'togglebutton'.

could me out? example code welcome...

this should trick:

<listbox>     <listbox.resources>         <style targettype="expander">             <setter property="template">                 <setter.value>                     <controltemplate targettype="expander">                         <grid>                             <grid.rowdefinitions>                                 <rowdefinition height="auto" />                                 <rowdefinition height="auto" />                             </grid.rowdefinitions>                              <checkbox                                 ischecked="{binding path=isexpanded, relativesource={relativesource templatedparent}}"                                 content="{templatebinding header}"                                 />                             <contentcontrol                                 x:name="body"                                 grid.row="1" content="{templatebinding content}"                                 />                         </grid>                          <controltemplate.triggers>                             <trigger property="isexpanded" value="false">                                 <setter targetname="body" property="visibility" value="collapsed" />                             </trigger>                         </controltemplate.triggers>                     </controltemplate>                 </setter.value>             </setter>         </style>      </listbox.resources>      <expander header="one">         content 1     </expander>      <expander header="two">         content 2     </expander> </listbox> 

i've defined style here changes template of expander controls style applied. (and since i've put style in listbox.resources it'll automatically apply expander controls in list.)

the trick getting checkbox work when put (or indeed togglebutton based control) expander template, need use data binding configured relativesource set templatedparent. enables two-way binding - means not checkbox reflect current state of expander, able change current state.