c# - How can I reference a control on a tab from another tab? -

i have wpf mainwindow tab control. 1st tab called persons , has gridview bound persons observable collection. selecting checkboxes , click next button go next tab has identical grid of persons bound selectedpersons. on first tab's next button, apparently need refresh gridview on secondtab.

like datagrid.items.refresh.

i don't know how reference it. this?

public override void nexttab() { ((datagrid)this.maintabs[1].controls["selectedpersonsgridview"]).items.refresh } 

i total newbie @ wpf , can see have no idea doing trying do. don't know patterns yet.

if have named control selectedpersonsgridview don't need find control can use it's name reference it.

xaml

<window x:class="wpfapplication1.mainwindow"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         title="mainwindow" height="350" width="525">     <grid>         <tabcontrol>             <tabitem header="tab1">                 <grid background="#ffe5e5e5">                     <button content="button" horizontalalignment="left" verticalalignment="top" width="75" margin="22,36,0,0" click="button_click"/>                 </grid>             </tabitem>             <tabitem header="tab2">                 <grid name="selectedpersonsgridview">                  </grid>             </tabitem>         </tabcontrol>     </grid> </window> 

and code behind

using system.windows; using system.windows.media;  namespace wpfapplication1 {     public partial class mainwindow : window     {         public mainwindow()         {             initializecomponent();          }          private void button_click(object sender, routedeventargs e)         {             selectedpersonsgridview.background = brushes.red;         }     } }