datatemplate

I am writing a composite loosely coupled MVVM WPF application and child VMs in a parent VM are interfaces rather than class instances, e.g. public IChildViewModel { get; set; } Now how do I render this property using a DataTemplate? like: <DataTemplate DataType="{x:Type contracts:IChildViewModel}"> I understand due to the nature of interfaces (multiple inheritance etc.) WPF does not allow this direct binding. But as interfaces should be used widely in loosely coupled applications, is there any workaround to bind DataTemplate to interfaces? Thanks. You can bind to interfaces by telling wpf

Is there a short way to make a FooterTemplate (in a GridView) always visible, even when DataSource is empty? If you want it to always display, regardless of content, can't you just put the footer html outside the GridView , instead of in the FooterTemplate ? If that's not an option for some reason, then you can either add an null row to your data source if it's empty , or subclass the GridView & override the default behaviour . Those are the only options I'm aware of (although its been a while since the last time I used a GridView ). Aximili I was having trouble with this as well. The link

I have this requirement, that I have a collection of items (ObservableCollection), but I only want to display the first item. The requirement comes from the fact that in most of the case, the collection only contains one item. And due to the space limit, even if there is more than one items in the collection, we'd like to display the number of the items, details of the first one (same presentation as prior situation) and a ... symbol to indicate to the user that there is more items. And when the mouse is over the UI element a popup will eventually display all items. The first solution I can

I have WPF ComboBox inside a data template (a lot of comboboxes in listbox) and I want to handle enter button. It would be easy if it was e.g. a button - I would use Command + Relative binding path etc. Unfortunately, I have no idea how handle key press with a Command or how to set event handler from template. Any suggestions? You can use the EventSetter in the style you are setting the template with: <Style TargetType="{x:Type ListBoxItem}"> <EventSetter Event="MouseWheel" Handler="GroupListBox_MouseWheel" /> <Setter Property="Template" ... /> </Style> levanovd I've solved my problem by using

'ContentTemplate' is a DataTemplate that displays an object which has a member 'FooList' (an ObservableCollection). <DataTemplate x:Key="ContentTemplate"> <ListBox ItemsSource="{Binding Path=FOO}"> ... </ListBox> </DataTemplate> I need to be able to filter that FooList using a CollectionViewSource. This is usually been straight forward but I can't seem to get the binding to work within a DataTemplate. I attempted to this: <DataTemplate x:Key="ContentTemplate"> <DataTemplate.Resources> <CollectionViewSource x:Key="CVS" Source="{Binding Path=FooList}" Filter="FooFilter"/> <DataTemplate.Resources