c# - Determining checked Radiobutton from groupbox in WPF following MVVM -

i have groupbox radiobuttons. how know 1 checked. using wpf , following mvvm.

please excuse me if duplicate question , did enough googling.

<groupbox name="grpbx_pagerange" header="print range">             <grid >                 <radiobutton name="radbtn_all" content="all pages"  groupname="radios_page_range" ischecked="true"  />                 <radiobutton x:name="radbtn_curr" content="current page"  groupname="radios_page_range"  />                 <radiobutton name="radbtn_pages" content="page range"   groupname="radios_page_range" />  .... </groupbox> 

now, 1 way figure out bind each radiobutton's ischecked property property in viewmodel , if..else sort of logic in viewmodel figure out selected radiobutton.

but there other eligant way? new mvvm , not expert in wpf - please excuse if solution silly. smile

thanks in advance.

you can bind radiobutton.command of radiobuttons command of viewmodel , send unique commandparameter identify button has called command in commandhandler.

<radiobutton command="{binding mycommand}" commandparameter="radio1"/> <radiobutton command="{binding mycommand}" commandparameter="radio2"/> <radiobutton command="{binding mycommand}" commandparameter="radio3"/> 

in command handler check parameter identify radiobutton.

thanks