I found some strange problem in WPF, using the itemsSource of a treeview. I hope I can make this specific problem clear for you. First; a story. There is a treeview. It has a list with treeviewitems as itemsSource. This list is called _roots. There is another list, called _leafs. For as in a treeview, the _roots contain the _leafs in so...
I have a typical treeview and a viewmodel. The viewmodel has an observable collection of other viewmodels that serves as a data source for the tree. public class TreeViewVM { public ObservableCollection<ItemVM> Items { get; private set; } public ItemVM SelectedItem { get; set; } } and the ItemVM : public class ItemVM { ...
How do you get the level of a treeviewitem in WPF C#? In windows forms there is a .Level member of the treeview class but there does not seem to be one for WPF C#. ...
I have a System.Windows.Controls.TreeView in my project, and when the user right click in it, I'm displaying a context menu. Since the context menu is built dynamically, I need to know the System.Windows.Controls.TreeViewItem that the mouse is hovering over. How do I do this? ...
Hi, I have TreeViewItems where the HierarchicalDataTemplate consists of a Grid with 3 columns with the following definitions: <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" /> <ColumnDefinition Width="1*" /> <ColumnDefinition Width="Auto" /> ... I want to set the width of the grid so that it would ta...
Hi! I have a problem with my TreeView in a WPF application (Framework 3.5 SP1). It's a TreeVIew with 2 Levels of Data. I expand / collapse the items of the first level in a particular way (with a single mouse-click on the TreeViewItem). Again when I expand a first-level TreeViewItem, I add some second-level TreeViewItems to the group (it...
Hi, how can I get the constituent controls making up the TreeViewItem in code if they are inside a hierarichicaldatatemplate? <HierarchicalDataTemplate DataType="{x:Type local:Module}" ItemsSource="{Binding Children}"> <StackPanel Orientation="Horizontal"> <Image Width="16" Height="16" Margin="3,0" Source="I...
There has to be a better way then the following for getting "childItem" TaskItem task = (sender as Canvas).DataContext as TaskItem; TaskItem child = Tasks.CreateTask("New task", task); TreeViewItem item = treeView.ItemContainerGenerator.ContainerFromItem(task) as TreeViewItem; item.UpdateLayout(); TreeVi...
Hello out there, is there any way to expand just the root node of a WPF tree in XAML? Thanks! Dirk ...
I am new to using styles, resources and templates in WPF. What I need to do is override the ToggleButton +/- in the TreeView to be an image, with a different image for each TreeViewItem root Node. For Instance, I would want an image of a car for the "Car" node, and an image of an airplane for the "Plane" node. I have a colorful and a ...
Hello: I'm developing a TreeView based control and my double click event continues to bubble up my TreeViewItem nodes. The goal is to have the TreeViewItem expand or collapse when it is double clicked. I have a style that applies an event handler for the MouseDoubleClick event to each TreeViewItem. Here's the code that handles the e...
I am trying to do something similar to what the person in this question wanted to do. Is there any, more elegant, way to do this than the work-around suggested there? (As a last resort) Is there a different mvvm framework that would have better support for doing this? Right now I'm trying to make a custom control that inherits from t...
I am trying to attach some handlers to each TreeViewItem as they are loaded and then remove the handlers as they are unloaded. Here is the Code that I have in my custom control which inherits from TreeView: public ModdedTreeView() { this.AddHandler(TreeViewItem.LoadedEvent, new RoutedEventHandler(ItemLoaded)); ...
I am dragging and dropping a Treeviewitem from a RadTreeview in my WPF/C# project. After a succesful drag and drop the node disappears from the treeview. How can I avoid this? which event handler to change for this? I am assuming that this should be done in teh treeview's drag event handler and nothing to do with the grid's drop event ha...
Ok... this is sort of a two-parter here. (Sort of. May actually just be one. That's what I'm hoping anyway.) First, more generally, is it possible to target, via XAML only, a named item in a control's template? For instance, if a control's template has a ContentPresenter named 'PART_Foo' and we want to specifically set the Horizonta...
Ok, this is sort of a follow-up to my first question http://stackoverflow.com/questions/3827701/modify-or-tweak-an-existing-treeviewitem-control-template but since it is technically a new question, I'm told a good S/O visitor should create a new one, so here it is! Ok... the existing template for a TreeViewItem is based on a grid, a bor...
I found the following code for showing the selected item in a treeview when focus has left, but I'm having trouble moving the code to App.xaml so any UserControl could use it. This does what I want <TreeView x:Name="trviewArchives" Width="141" Height="154" Canvas.Left="20" Canvas.Top="167" Background="{x:Null}" BorderBrush="#FF08182...
Hi All, In my WPF application I have a treeview which is loaded with certain collection. At the top of this tree view control i have a listbox which stores the same items as in the tree view whenever the tree view items are made favorites. I am trying to focus the treeview item whenever there is a selection made in the listbox. Though t...
Hi, I have a TreeView whose contents (nested TreeViewItems) are generated from a dataset via databinding, which all seems to work fine. The issue I'm running into is that when I try and manipulate the contents of the TreeViewItem headers in code, the Header property returns the DataRowView that the TreeViewItem was generated from and no...