c# - How to change itemsControl stackpanel background color -

says have list of 10 items somelist, show them on page via itemscontrol below:

<itemscontrol datacontext="{binding [someviewmodel]}"                borderbrush="black"                itemsource="{binding somelist}">     <itemscontrol.itemtemplate>         <datatemplate>             <border borderthickness="1" background="green">                 <stackpanel mousedown="{binding path=datacontext.somecommand,                                            relativesource={relativesource findancestor,ancestortype={x:type itemscontrol}}}"                                          command parameter="{binding someid}">                     <textblock text="{binding something}">                 </stackpanel>             </border>         </datatemplate>     </itemscontrol.itemtemplate> </itemscontrol> 

i able trigger somecommand method , able pass in someid input parameter. i'm wondering how update stackpanel background color, making looks "selected". meaning item have green background, when click on 1 of stackpanel, stackpanel should change background red , change others green

if want use itemscontrol can change itemtemplate radiobutton custom controltemplate include border background change red when ischecked == true:

<itemscontrol datacontext="{binding [someviewmodel]}" borderbrush="black" itemsource="{binding somelist}">     <itemscontrol.itemtemplate>         <datatemplate>             <radiobutton content="{binding something}" groupname="radiogroup">                 <radiobutton.template>                     <controltemplate targettype="{x:type radiobutton}">                         <border background="green" x:name="part_border">                             <contentpresenter/>                         </border>                         <controltemplate.triggers>                             <trigger property="ischecked" value="true">                                 <setter targetname="part_border" property="background" value="red"/>                             </trigger>                         </controltemplate.triggers>                     </controltemplate>                 </radiobutton.template>             </radiobutton>         </datatemplate>     </itemscontrol.itemtemplate> </itemscontrol> 

however don't see reason why cannot use listbox selectionmode=single (default value) , change template of listboxitem:

<listbox datacontext="{binding [someviewmodel]}" borderbrush="black" itemsource="{binding somelist}">     <listbox.itemcontainerstyle>         <style targettype="{x:type listboxitem}">             <setter property="template">                 <setter.value>                     <controltemplate targettype="{x:type listboxitem}">                         <border background="green" x:name="part_border">                             <contentpresenter/>                         </border>                         <controltemplate.triggers>                             <trigger property="isselected" value="true">                                 <setter targetname="part_border" property="background" value="red"/>                             </trigger>                         </controltemplate.triggers>                     </controltemplate>                 </setter.value>             </setter>         </style>     </listbox.itemcontainerstyle> </listbox> 

or this, without changing template:

<listbox datacontext="{binding [someviewmodel]}" borderbrush="black" itemsource="{binding somelist}">     <listbox.resources>         <solidcolorbrush x:key="{x:static systemcolors.highlightbrushkey}" color="red"/>     </listbox.resources>     <listbox.itemcontainerstyle>         <style targettype="{x:type listboxitem}">             <setter property="background" value="green"/>         </style>     </listbox.itemcontainerstyle> </listbox> 

in wpf it's easier pick control has functionality need , style want other way round