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  • dynamic ContextMenu in TreeView vs. MVVM

    - by bitbonk
    I have a tree of ViewModels displayed as a TreeView (using HierarchicalDataTemplate). Each ViewModel instance has different commands that can be executed on it wich again are exposed as a list of command ViewModels for each item ViewModel. How can I create a single ContextMenu that opens at the TreeViewItem that was rightclicked and that populates its commands from the underlying item ViewModel's command ViewModels list? All in a decent MVVM fashion ...

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  • ListBox SelectedItems Binding

    - by Polaris
    I want to bind Listbox selectedItems to array. But .NET throw exceprion in runtime. d.SetBinding(ListBox.SelectedItemsProperty, new Binding { Source = SomeArray }); Where "d" some ListBox from XAML. Exception: Selected Item cannot be bound. Why?

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  • CultureInfo on a IValueConverter implementation

    - by slugster
    When a ValueConverter is used as part of a binding, one of the parameters to the Convert function is a System.Globalization.CultureInfo object. Can anyone tell me where this culture object gets its info from? I have some code that formats a date based on that culture. When i access my silverlight control which is hosted on my machine, it formats the date correctly (using the d/MM/yyyy format, which is set as the short date format on my machine). When i access the same control hosted on a different server (from my client machine), the date is being formatted as MM/dd/yyyy hh:mm:ss - which is totally wrong. Coincidentally the regional settings on the server are set to the same as my client machine. This is the code for my value converter: public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if (value is DateTime) { if (parameter != null && !string.IsNullOrEmpty(parameter.ToString())) return ((DateTime)value).ToString(parameter.ToString()); else return ((DateTime)value).ToString(culture.DateTimeFormat.ShortDatePattern); } return value; } basically, a specific format can be specified as the converter parameter, but if it isn't then the short date pattern of the culture object is used.

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  • WinForms TabControl: How to avoid tab-rendering on DrawMode=OwnerDrawFixed?

    - by splattne
    I extended the (WindowsForms) built-in TabControl in order to implement closing tabs right on the tab itself ("x" image on the right like in Webbrowsers). The inherited control renders the text and images. Also, it uses visual styles on hover etc. All works very well, but I have one problem I can't solve. When the tabs are rendered, I cannot avoid that the Control paints the tabs another time as seen in this screenshot: That's a problem for two reasons: It looks ugly on the selected tab I'd like to increase the tabs' width because the current width doesn't take account of the "x" image on the right Any idea how to solve this?

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  • LINQ to Entities exceptions (ElementAtOrDefault and CompareObjectEqual)

    - by OffApps Cory
    I am working on a shipping platform which will eventually automate shipping through several major carriers. I have a ShipmentsView Usercontrol which displayes a list of Shipments (returned by EntityFramework), and when a user clicks on a shipment item, it spawns a ShipmentEditView and passes the ShipmentID (RecordKey) to that view. I initially wrestled with trying to get the context from the parent (ShipmentsView) and finally gave up resolving to get to it later. I wanted to do this to keep a single instance of the context. anyhow, I now create a new instance of the context in my ShipmentEditViewModel, and query against it for the Shipment record. I know I could just pass the record, but I wanted to use the Ocean Framework that Karl Shifflett wrote and don't want to muck about writing new transition methods. So anyhow, I query and when stepping through, I can see that it returns a record, as soon as execution reached the point where it assigned the query result to the e.Result property, it throws up the following exception depending on the query I used. LINQToEntities Dim RecordID As Decimal = CDec(e.Argument) Dim myResult = From ship In _Context.Shipment _ Where ship.ShipID = e.Argument _ Select ship Select Case myResult.Count Case 0 e.Result = New Shipment Case 1 e.Result = myResult(0) Case Else e.Result = Nothing End Select "LINQ to Entities does not recognize the method 'System.Object.CompareObjectEqual(System.Object, System.Object, Boolean)' method, and this method cannot be translated into a store expression. LINQToEntities via Method calls Dim RecordID As Decimal = CDec(e.Argument) Dim myResult = _Context.Shipment.Where(Function(s) s.ShipID = RecordID) Select Case myResult.Count Case 0 e.Result = New Shipment Case 1 e.Result = myResult(0) Case Else e.Result = Nothing End Select LINQ to Entities does not recognize the method 'SnazzyShippingDAL.Shipment ElementAtOrDefault[Shipment] (System.Linq.IQueryable`1[SnazzyShippingDAL.Shipment], Int32)' method, and this method cannot be translated into a store expression. I have been trying to get this thing to display a record for like three days. i am seriously thinking about going back and re=-engineering it without the MVVM pattern (which I realize I am only starting to learn and understand) if only to make the &$^%ed thing work. Any help will be muchly appreciated. Cory

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  • creating Linq to sqlite dbml from DbLinq source code

    - by Veer
    Hi All, I tried to create linq-to-sqlite dbml using DbLinq but in vain. Each time I get different type of errors. May be I'm somewhere wrong. Can anyone tell me the step by step procedure to create the dbml file from the Dblinq source code. Edit: Steps I Followed: I downloaded the source file from this link. Edited the "run_sqliteMetal.bat" file in \\DbLinq-0.19\src\DbMetal folder as 'DbMetal.exe -database:myDb.db3 -namespace:myNS -code:myCode.cs' -dbml:myDbml.dbml Tried to run the DbMetal project file to produce the executable but there was a runtime error since Options object in Parameters.cs was null. Hence downloaded the readymade exe file from this location Copied it into the \DbLinq-0.19\src\DbMetal folder Executed the "run_sqliteMetal.bat" file I got a blank screen and Windows Error Msg "DbLinq has stopped Working" Any help? Thanks in advance, Veer

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  • How does CommandManager.RequerySuggested work?

    - by Andrei Rinea
    The MSDN only states that Occurs when the CommandManager detects conditions that might change the ability of a command to execute. However I can't seem to find any traces of how this works, what I should be aware of / avoid etc... Does it just listen for input? (i.e.: mouse moves, keys pressed and so on)

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  • problem with tabbed interface as mentioned in the article of josh smith

    - by Egi
    hello guys, i ve got a problem with my programm. here is the link: http://dl.dropbox.com/u/2734432/TabbedInterface.7z once u have opened both tabs, u ll start loosing the references to other collections of the current item in the view. that is because these ids are nullable and once you switch over to the other tab they ll become null. my question is why and how can i corrent that behavoir? if you change the int? to int there are no more problem, but i need them to be nullable!

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  • What is the standard convention for defining nested view:viewmodel mapping in MVVM Light

    - by firoso
    so in classic MVVM examples ive seen DataTemplate definitions are used to map up View Models to Views, what is the standard way to do this in MVVM Light framework, and where should the mappings be located? Following are examples of what I'm doing now and what I'm talking about, blendability is important to me! Main Window: <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="STS2Editor.MainWindow" Title="{Binding ApplicationTitle, Mode=OneWay}" DataContext="{Binding RootViewModel, Source={StaticResource Locator}}"> <Window.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="Skins/ApplicationSkin.xaml" /> <ResourceDictionary Source="Resources/ViewMappings.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Window.Resources> <Grid> <ContentControl Content="{Binding ApplicationManagementViewModel}" HorizontalAlignment="Left" VerticalAlignment="Top"/> </Grid> </Window> In the above code, my RootViewModel class has an instance of the class ApplicationManagementViewModel with the same property name: public ApplicationManagementViewModel ApplicationManagementViewModel {get {...} set {...} } I reference the ResourceDictionary "ViewMappings.xaml" to specify how my view model is represented as a view. <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:STS2Editor.ViewModel"> <DataTemplate DataType="{x:Type local:ApplicationManagementViewModel}"> <local:ApplicationManagementView/> </DataTemplate> </ResourceDictionary> should I be doing things like this using ViewModelLocator? what about collections of view models?

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  • How can I use Window.ShowActivated = false with Maximized window?

    - by Anthony Brien
    I have an application that has a splash screen shown before I create my main window. I want to avoid the main window stealing the focus when it gets created if the user has focused another application while the splash screen was shown. My application's startup looks like this: private void Application_Startup(object sender, StartupEventArgs e) { SplashScreenService.Start(); // Initializing stuff... ... // Ready to open the main window. MainWindow mainWindow = MainWindow(); mainWindow.ShowActivated = SplashScreenService.HasFocus(); mainWindow.ShowDialog(); } To prevent the main window from getting activated, I'm setting Window.ShowActivated to false, only if the splash screen has lost the focus. But this causes an exception: InvalidOperationException: Cannot show Window when ShowActivated is false and WindowState is set to Maximized. Indeed, my MainWindow sets the WindowState to Maximized (restored from previous session settings). I don't understand why there is such a limitation with the ShowActivated feature. I couldn't find any documentation about this issue. I tried forcing WindowState to Normal when ShowActivated is false, and it prevents the exception, but it also activates the window! Maybe changing the window state actually causes an activation? Is there a trick I can use to work around this? I want to restore my main window in a maximized state, and not have the main window steal focus away from other applications if the user has focused away from my app during the splash screen.

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  • How can a separator be added between items in an ItemsControl

    - by Grandpappy
    I'm needing to display a list of numbers from a collection in an Items Control. So the items are: "1", "2", "3". When they are rendered, I need them separated by a comma (or something similar). So the above 3 items would look like this: "1, 2, 3". How can I add a separator to the individual items, without having one tacked on the end of the list? I am not stuck on using an ItemsControl, but that's what I had started to use.

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  • MVVM - ListBox SelectedItem Binding Property Going Null

    - by Peanut
    So i have a listbox: <ListBox x:Name="listbox" HorizontalAlignment="Left" Margin="8,8,0,8" Width="272" BorderBrush="{x:Null}" Background="{x:Null}" Foreground="{x:Null}" ItemsSource="{Binding MenuItems}" ItemTemplate="{DynamicResource MenuItemsTemplate}" SelectionChanged="ListBox_SelectionChanged" SelectedItem="{Binding SelectedItem}"> </ListBox> and i have this included in my viewmodel: public ObservableCollection<MenuItem> MenuItems { get { return menuitems; } set { menuitems = value; NotifyPropertyChanged("MenuItems"); } } public MenuItem SelectedItem { get { return selecteditem; } set { selecteditem = value; NotifyPropertyChanged("SelectedItem"); } } and also in my viewmodel: public void UpdateStyle() { ActiveHighlight = SelectedItem.HighlightColor; ActiveShadow = SelectedItem.ShadowColor; } So, the objective is to call UpdateStyle() whenever selectedchanged event is fired. So in the .CS file, i call UpdateStyle(). The problem is, whenever I get into the selectionchanged event method, my ViewModel.SelectedItem is always null. I tried debugging this to see if the binding was working correctly, and it is. When I click on an item in the listbox, the SelectedItem Set is triggered, setting the value... but somewhere inbetween that and the selected changed (In the CS File) It gets reset to Null. Can anyone help out? Thanks

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  • TextBox, Button and ListBox in a ListBox

    - by Emil C
    I have a listbox with a bunch of contols in each list item. <ListBox x:Name="projectList" IsSynchronizedWithCurrentItem="True"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel> <TextBlock Text="{Binding Name}" /> <ListBox x:Name="taskList" ItemsSource="{Binding Tasks}"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel> <TextBlock Text="{Binding Name}" /> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> <TextBox x:Name="textBoxTask" /> <Button x:Name="ButtonAddNewTask" Content="Test" CommandParameter="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=DataContext}" Click="ButtonAddNewTask_Click" /> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> When I click on the button in the listbox i want to add a new item to the listbox within the listbox. I've come this far. So my question is how do I get hold of the textbox and how do I update the listbox? Here is my click event private void ButtonAddNewTask_Click(object sender, RoutedEventArgs e) { Button button = (Button)sender; Project proj = button.DataContext as Project; if(proj.Tasks == null) proj.Tasks = new List<Task>(); proj.Tasks.Add(new Task("Added Task")); } Thanx

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  • RDLC: How to print multiple tables in one report

    - by Eduardo Molteni
    I'm generating the RDLC XML schema and showing the report in the ReportViewer control. No problems there. Now, I want a report with 2 tables, with 2 differents dataset. Something like this gets generated: <Body> <ReportItems> <Table Name="Table1"> .... </Table> <Table Name="Table2"> .... </Table> </ReportItems> </Body> But, when printed, both tables start from the top, printing one table over the other (not nice) Is there a way to tell that Table2 should start after Table1? Update: I've tried with List with a fake DataSource, but it does not work.

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  • Async friendly DispatcherTimer wrapper/subclass

    - by Simon_Weaver
    I have a DispatcherTimer running in my code that fire every 30 seconds to update system status from the server. The timer fires in the client even if I'm debugging my server code so if I've been debugging for 5 minutes I may end up with a dozen timeouts in the client. Finally decided I needed to fix this so looking to make a more async / await friendly DispatcherTimer. Code running in DispatcherTimer must be configurable whether it is reentrant or not (i.e. if the task is already running it should not try to run it again) Should be task based (whether or not this requires I actually expose Task at the root is a gray area) Should be able to run async code and await on tasks to complete Whether it wraps or extends DispatcherTimer probably doesn't really matter but wrapping it may be slightly less ambiguous if you don't know how to use it Possibly expose bindable properties for IsRunning for UI

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  • Add Table to FlowDocument In Code Behind

    - by urema
    Hi, I have tried this..... _doc = new FlowDocument(); Table t = new Table(); for (int i = 0; i < 7; i++) { t.Columns.Add(new TableColumn()); } TableRow row = new TableRow(); row.Background = Brushes.Silver; row.FontSize = 40; row.FontWeight = FontWeights.Bold; row.Cells.Add(new TableCell(new Paragraph(new Run("I span 7 columns")))); row.Cells[0].ColumnSpan = 6; _doc2.Blocks.Add(t); But everytime I go to view this document the table never shows.....although the border image and document title that I add to this document before adding this table outputs fine. Thanks in advance, U.

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  • SelectionChanged event binding in Silverlight+MVVM-Light

    - by Budda
    The handler of the "SelectionChanged" event of the ComboBox control has the following signature: void SelectionChangedMethod(object sender, SelectionChangedEventArgs e) How to bind to that property under Silverlight 4 and MVVM-Light to the corresponding method of the ViewModel object? As far as I know, I need to do something like this: public void Changed(Object obj, SelectionChangedEventArgs e) { // .... implement logic here } RelayCommand<Object, SelectionChangedEventArgs> _command; public ICommand ObjectSelectionChanged { get { if (_command == null) { _command = new RelayCommand<Object, SelectionChangedEventArgs>(Changed); } return _command; } } The problem is that RelayCommand class in the MVVM-Light framework doesn't support 2 generic parameters... Is there any solution or workaround for this case? How bind control event to the method with 2 parameters?

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  • Deploying xbap in a full trust mode

    - by SituStarz
    I have xbap which needs to run on a full trust mode because my application needs to upload a file from the client machine to process. I have to provide a installation steps to install. If i do it as a click one instillation, do i still get a security error? If so what is the best way to resolve it? If i install it in remote server, I saw couple of options in internet like creating certificates and ask user to import this certificate. Other option is to ask the user to allow access to xbap applications which provides access to all xbap applications (not so good). what is best way? It would be really great, if some could provide me the installation steps for both scenarios.

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  • Measuring Loading time of a web page (C#)

    - by j-t-s
    Hi All I would like to know if there is a simple way of measuring the time it takes from when you hit Enter, to the time where a web page is fully displayed/loaded. Would I need to use a Timer for this, or are there existing features built into the Web Browser control (or .net framework) that I have missed out on? Thank you

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  • Cannot convert the value in attribute '[attr]' to object of type 'System.Windows.TemplateBindingExte

    - by Krimson
    Hi, I get this error when I define my attached dependency properties in a class outside the class hierarchy and set the owner to a common parent class. Attached dependency property in WindowBase class (outside class hierarchy = generated error): public static readonly DependencyProperty AreaColorProperty = DependencyProperty.RegisterAttached("AreaColor", typeof(AreaColor), typeof(Window)); TemplateBinding that fails {TemplateBinding local:WindowBase.AreaColor} If I instead define the attached dependency property in a class within the class heirarchy and set the owner to this class, then I don't get any errors, why is this? Attached dependency property in WindowBase (within class hierarchy = no errors): public static readonly DependencyProperty AreaColorProperty = DependencyProperty.RegisterAttached("AreaColor", typeof(AreaColor), typeof(WindowBase)); Best Regards, Jesper

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  • MVVM Binding to Properties.Settings

    - by LnDCobra
    In a MVVM approach how would I go about binding to Properties.Settings? Is there a way to bind a property in C# code(in the ViewModel) to another property(Properties.Settings.Default) or should i just bind to standard properties and on save make sure each property gets propogated manually to the Properties.Settings?

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  • Why won't my progress bar work?

    - by user113164
    I can't get my progress bar to work. Any help is much appreciated! Here's the code: <Window x:Class="BulkSAConfigureControl.BulkSaProgressBar" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Please Wait.." Height="60" Width="300" WindowStyle="ToolWindow" ResizeMode="NoResize" WindowStartupLocation="CenterScreen"> <ProgressBar Name="progressBar" IsIndeterminate="True"> <ProgressBar.Resources> <ResourceDictionary Source="/PresentationFramework.Aero;v3.0.0.0;31bf3856ad364e35;component/themes/aero.normalcolor.xaml" /> </ProgressBar.Resources> </ProgressBar> . public class ProgressBarClass : Window { public ProgressBarClass() { InitializeComponent(); } public void StartProgressBar() { Duration d = new Duration(TimeSpan.FromSeconds(5)); DoubleAnimation anim = new DoubleAnimation(100.0, d); progressBar.BeginAnimation(ProgressBar.ValueProperty, anim); this.Show(); } public void StopProgressBar() { this.Close(); } } . public class DoSomething : UserControl { public void DoSomeStuff() { ProgressBarClass pBar = new ProgressBarClass(); pBar.StartProgressBar(); // Do some stuff here pBar.StopProgressBar(); } }

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  • TreeViewItem - Use ControlTemplate and HierarchicalDataTemplate together

    - by CrownJ
    I'm using HierarchicalDataTemplate in my TreeView, and I wanted to also overwrite the default template for the TreeViewItem so that when an item is selected, it only highlights the text, not including the icon next to it. <TreeView.ItemTemplate> <HierarchicalDataTemplate ItemsSource="{Binding Children}"> <TreeViewItem Style="{StaticResource TreeViewItemStyle}" Header="{Binding DisplayText}" /> </HierarchicalDataTemplate> </TreeView.ItemTemplate> <TreeView.Resources> <Style x:Key="TreeViewItemFocusVisual"> <Setter Property="Control.Template"> <Setter.Value> <ControlTemplate> <Rectangle/> </ControlTemplate> </Setter.Value> </Setter> </Style> <Style x:Key="ExpandCollapseToggleStyle" TargetType="{x:Type ToggleButton}"> <Setter Property="Focusable" Value="False"/> <Setter Property="Width" Value="19"/> <Setter Property="Height" Value="13"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type ToggleButton}"> <Border Width="19" Height="13" Background="Transparent"> <Border Width="9" Height="9" SnapsToDevicePixels="true" BorderBrush="#FF7898B5" BorderThickness="1" CornerRadius="1"> <Border.Background> <LinearGradientBrush EndPoint="1,1" StartPoint="0,0"> <GradientStop Color="White" Offset=".2"/> <GradientStop Color="#FFC0B7A6" Offset="1"/> </LinearGradientBrush> </Border.Background> <Path x:Name="ExpandPath" Fill="Black" Margin="1,1,1,1" Data="M 0 2 L 0 3 L 2 3 L 2 5 L 3 5 L 3 3 L 5 3 L 5 2 L 3 2 L 3 0 L 2 0 L 2 2 Z"/> </Border> </Border> <ControlTemplate.Triggers> <Trigger Property="IsChecked" Value="True"> <Setter Property="Data" TargetName="ExpandPath" Value="M 0 2 L 0 3 L 5 3 L 5 2 Z"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> <Style x:Key="{x:Type TreeViewItem}" TargetType="{x:Type TreeViewItem}"> <Setter Property="Background" Value="Transparent"/> <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/> <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/> <Setter Property="Padding" Value="1,0,0,0"/> <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/> <Setter Property="FocusVisualStyle" Value="{StaticResource TreeViewItemFocusVisual}"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type TreeViewItem}"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto"/> <ColumnDefinition Width="Auto"/> <ColumnDefinition Width="*"/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition/> </Grid.RowDefinitions> <ToggleButton x:Name="Expander" Style="{StaticResource ExpandCollapseToggleStyle}" ClickMode="Press" IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}"/> <StackPanel Orientation="Horizontal" Grid.Column="1" > <Image Width="16" Height="16" Margin="3,0" Source="{Binding Path=ImageSource}" /> <Border x:Name="Bd" SnapsToDevicePixels="true" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Margin="0" Padding="0"> <ContentPresenter x:Name="PART_Header" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" ContentSource="Header"/> </Border> </StackPanel> <ItemsPresenter x:Name="ItemsHost" Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="1"/> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsExpanded" Value="false"> <Setter Property="Visibility" TargetName="ItemsHost" Value="Collapsed"/> </Trigger> <Trigger Property="HasItems" Value="false"> <Setter Property="Visibility" TargetName="Expander" Value="Hidden"/> </Trigger> <Trigger Property="IsSelected" Value="true"> <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/> <Setter Property="Control.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/> </Trigger> <MultiTrigger> <MultiTrigger.Conditions> <Condition Property="IsSelected" Value="true"/> <Condition Property="IsSelectionActive" Value="false"/> </MultiTrigger.Conditions> <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/> <Setter Property="Control.Foreground" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/> </MultiTrigger> <Trigger Property="IsEnabled" Value="false"> <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> <Style.Triggers> <Trigger Property="VirtualizingStackPanel.IsVirtualizing" Value="true"> <Setter Property="ItemsPanel"> <Setter.Value> <ItemsPanelTemplate> <VirtualizingStackPanel/> </ItemsPanelTemplate> </Setter.Value> </Setter> </Trigger> </Style.Triggers> </Style> </TreeView.Resources> I couldn't find a way to use both the HierarchicalDataTemplate and ControlTemplate together so I can specify the ItemsSource and also change parts of the control's behavior. When I do the above code, it won't select the treeviewitem at all.

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