XAML windows 8 metro app, binding issue -

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i using grouped gridview in windows 8 metro application, have variablesizedwrapgrid in itemspaneltemplate , , want bind maximumrowsorcolumns property, not binding correctly.

here xaml 

<gridview  itemssource="{binding source={staticresource groupeddata}}" >     <gridview.itemtemplate>         <datatemplate>             <grid width="120" height="150" >                 <!--some controls here binded correctly.-->             </grid>         </datatemplate>     </gridview.itemtemplate>     <gridview.groupstyle>         <groupstyle>             <groupstyle.headertemplate>                 <datatemplate>                     <grid margin="1,0,0,6">                         <stackpanel orientation="horizontal">                             <textblock text="{binding maxgridcoulmns}"></textblock>                             <!--work ok here -->                             <textblock   foreground="black" padding="0,0,0,20" text="{binding headertext}"  />                         </stackpanel>                     </grid>                 </datatemplate>             </groupstyle.headertemplate>             <groupstyle.panel >                 <itemspaneltemplate>                     <variablesizedwrapgrid    orientation="horizontal"  maximumrowsorcolumns="{binding maxgridcoulmns}"  margin="0,0,80,0"/>                     <!--not binding  here -->                                          </itemspaneltemplate>             </groupstyle.panel>         </groupstyle>     </gridview.groupstyle> </gridview>

you have cast dependencyproperty icollectionviewgroup actual group object.

in code var actualgroup = (group windows.ui.xaml.data.icollectionviewgroup).group; - in xaml have add prefix group. binding path.

so in xaml, edit binding this:

<itemspaneltemplate>     <variablesizedwrapgrid         orientation="horizontal"         maximumrowsorcolumns="{binding group.maxgridcoulmns}"         margin="0,0,80,0"/> </itemspaneltemplate>

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