datatemplate

问题 I have a multi selection listbox where a user can tick multiple items in the list. At the moment I have it so when a checkbox is ticked the ListBoxItem it is within also gets selected: private void CheckBox_Checked(object sender, RoutedEventArgs e) { //Select the Item using the DataContext of the Button object clicked = (e.OriginalSource as FrameworkElement).DataContext; var lbi = LstDistro.ItemContainerGenerator.ContainerFromItem(clicked) as ListBoxItem; lbi.IsSelected = true; } Now I am

问题 I want to display dummy data in the design window of a WPF GridView and found a similar example: Answer: Design time data for datatemplate in xaml - Stack Overflow I created a new WPF App (.NET Framework 4.6.1) named WpfDataTemplate and copied in the code snippets from the example into MainWindow.xaml.cs and MainWindow.xaml . All additions are noted in comments with ## . Unexpected Behavior: The line <local:MyMockClass x:Key="DesignViewModel" /> produces the error "Object reference not set to

问题 Well , I have a problem with a function that I get from there [VB.NET] Public Class TreeHelper Public Shared Function FindVisualChildByName(Of T As FrameworkElement)(parent As DependencyObject, name As String) As T Dim child As T = Nothing For i As Integer = 0 To VisualTreeHelper.GetChildrenCount(parent) - 1 Dim ch = VisualTreeHelper.GetChild(parent, i) child = TryCast(ch, T) If child IsNot Nothing AndAlso child.Name = name Then Exit For Else child = FindVisualChildByName(Of T)(ch, name) End

问题 I have a custom class named BlinkingLight. I also have a static ObservableCollection BlinkingLightCollection. In the UI, I have a ListBox that is bound to BlinkingLightCollection. In my ListBox I want to essentially display each BlinkingLight object as a custom control that looks like box with an LED light that has an animation that makes the LED look like it just flashed on for a second then goes back to normal. My BlinkingLight class has third party "LED" object that raises an event called

问题 I'm trying to replace a standard control inside ListView DataTemplate with a custom control, but binding doesn't seem to work properly. Here is the definition of the ListView: <Grid> <ListView ItemsSource="{Binding DataItemsCollection}"> <ListView.ItemTemplate> <DataTemplate> <StackPanel> <TextBlock Text="Static text" /> <TextBlock Text="{Binding DataItemText}" /> <BindingTest:CustomControl CustomText="{Binding DataItemText}" /> </StackPanel> </DataTemplate> </ListView.ItemTemplate> <

问题 When we have a custom listbox with a defined event-handling for the left-click of the mouse, and also an additional shape inside the ListBoxItem data template which needs to do some action when it is clicked how can we handle these I have a Custom ListBox witch tries to handle the Click event : In the ContentView: <ABC:AListBox ClickCommand="{Binding LaunchCommand}" ...> </ABC:AListBox> In it's datatemplate we have this: <DataTemplate x:Key="ThisListTemplate"> <StackPanel ...> <Border Grid

问题 When we have a custom listbox with a defined event-handling for the left-click of the mouse, and also an additional shape inside the ListBoxItem data template which needs to do some action when it is clicked how can we handle these I have a Custom ListBox witch tries to handle the Click event : In the ContentView: <ABC:AListBox ClickCommand="{Binding LaunchCommand}" ...> </ABC:AListBox> In it's datatemplate we have this: <DataTemplate x:Key="ThisListTemplate"> <StackPanel ...> <Border Grid

问题 Is there some way to get the DataContext of a DataTemplate to use in bindings within its resources? <DataTemplate x:Key="History"> <ItemsControl ItemsSource="{Binding History}"> <ItemsControl.Resources> <app:BitmapProvider x:Key="Converter" ShowDetails="True" Type="{Binding Model.Type}" /> </ItemsControl.Resources> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <StackPanel Orientation="Horizontal" IsItemsHost="True"/> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> <ItemsControl.ItemTemplate

问题 I have problem System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:(no path); DataItem=null; target element is 'SolidColorBrush' (HashCode=48519443); target property is 'Color' (type 'Color') It can be reproduced with following xaml: <Window PreviewKeyDown="Window_PreviewKeyDown" xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase" ... > <Window.Resources> <DataTemplate DataType="{x:Type local

问题 I have a textbox that has the following simple XAML (not necessary to read it - just have it for reference): <TextBox Name="m_ctrlUserDeviceType" Style="{StaticResource textStyleTextBox}" Text="{Binding Source={x:Static api:MySettings.Instance}, Path=UserDeviceType, ValidatesOnExceptions=true, NotifyOnValidationError=true}" Validation.Error="TextBox_Error" MinHeight="25" Margin="4" VerticalAlignment="Top" MaxLength="23" VerticalContentAlignment="Center" HorizontalAlignment="Left" MinWidth=