I’ll cover an alternative way to handle images for disabled buttons in a future post. Alexey Potapov’s Greyable Image class provides the ImageGreyer.IsGreyable attached property, which will create an alternative image based on the colours of the original bitmap, to indicate a disabled state. The two buttons will cycle through the set of matches. There is also a person search function – as you type into the text box, the application will search through the full list of people models (not all corresponding people view models are guaranteed to have been created). The TreeView display is built up using a different data template for each ViewModel type. The left hand half of the main screen holds the full collection of item data, loaded from the data service as required using the Lazy Loading methodology. As the data structure is hierarchical (people within departments), it makes sense to reflect that in the user interface – using a TreeView rather than a linear list in a data grid. I’ve changed the layout of the StaffManager demo application substantially from the previous versions. Having introduced a number of different MVVM / WPF concepts over this blog series, it’s time to bring everything together into one coherent and cleanly structured application. things are done by a series of small things brought together. Item.SetValue(TreeViewItem.IsSelectedProperty, true) Private static void OnSelectedItemChanged(DependencyObject sender, DependencyPropert圜hangedEventArgs e) Public static readonly DependencyProperty SelectedItemProperty =ĭependencyProperty.Register("SelectedItem", typeof(object), typeof(BindableSelectedItemBehavior), new UIPropertyMetadata(null, OnSelectedItemChanged)) It uses a similar idea to Delta's solution, but without the need to subclass the TreeView: public class BindableSelectedItemBehavior : Behavior I realise this has already had an answer accepted, but I put this together to solve the problem. Consider using a derived class to avoid these problems.Įdit2 (.NET 4.5): The content of the DropDownList can be based on ToString() and not of DisplayMemberPath, while DisplayMemberPath specifies the member for the selected and displayed item only.
The basic features work, although with some inefficiencies, but advanced features may encounter known bugs. Warning: 50 : Using CollectionView directly is not fully supported. Maybe there is an issue with the CollectionView? I noticed a warning in the output console: If I change the PhonebookEntries property on the ConnectionViewModel to be of type ReadOnl圜ollection, the TwoWay binding of the SelectedValue property on the combobox works fine. Public event Propert圜hangedEventHandler Propert圜hanged Įdit: Geoffs second example does not seem to work, which seems a bit odd to me. Propert圜hanged(this, new Propert圜hangedEventArgs(propertyName)) Private void OnPropert圜hanged(string propertyName) Private readonly CollectionView _phonebookEntries _phonebookEntries = new CollectionView(list) Public class ConnectionViewModel : INotifyPropert圜hanged ((ConnectionViewModel)DataContext).PhonebookEntry = "test" Private void Button_Click(object sender, RoutedEventArgs e)
I can set the viewmodels PhoneBookEnty property and the selected item in the combobox changes, and I can change the selected item in the combobox and the view models PhoneBookEntry property is set correctly.Īnd here is my code-behind: namespace WpfApplication6ĬonnectionViewModel vm = new ConnectionViewModel() I copied you code and made some minor modifications, and it seems to work fine. Have you set the DataContext to your ConnectionViewModel object? You set the DisplayMemberPath and the SelectedValuePath to "Name", so I assume that you have a class PhoneBookEntry with a public property Name.