RelayCommand and popup in Windows Phone

Question

I'm currently writing app for Windows Phone 8.0 and I have a problem with RelayCommand from MVVM Toolkit light and popup.

I have a LongListSelector on the popup:

<Popup x:Name="popUp" Grid.Row="0" Grid.RowSpan="3" Opened="PopupOpened">
    <Grid>
        <ScrollViewer Grid.Row="2" Margin="10">
            <phone:LongListSelector ItemsSource="{Binding ItemsSelections}"
                                    ItemTemplate="{StaticResource DetailsItemTemplate}" />
        </ScrollViewer>
    </Grid>
</Popup>

And item's template:

<DataTemplate x:Key="DetailsItemTemplate">
    <Button VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch" Margin="5,5,5,5"
        Command="{Binding ElementName=LayoutRoot,Path=DataContext.ItemExecutionCommand}"
        CommandParameter="{Binding Type}">
    </Button>
</DataTemplate>

When I open popup for the first time, everything works fine, CanExecute returns false, buttons are disabled and the disable style is applied (foreground is gray). But, when I close popup and open again, buttons are disabled, but have normal style (foreground is white). Executing RaiseCanExecuteChanged method after every popup opening does not help. Anyone has this problem?

RelayCommand and popup in Windows Phone

0 Answers0