attachedbehaviors

问题 I'm setting a behavior on my control (in xaml), the behavior has the following code: protected override void OnAttached() { base.OnAttached(); AssociatedObject.Loaded += OnMycontrolLoaded; AssociatedObject.Unloaded += OnMycontrolUnloaded; } private void OnMycontrolLoaded(object sender, RoutedEventArgs e) { AssociatedObject.MyEvent +=MyEventHandler; } protected override void OnDetaching() { base.OnDetaching(); AssociatedObject.Loaded -= OnMycontrolLoaded; AssociatedObject.Unloaded -=

问题 This question already has answers here : Unsubscribe anonymous method in C# (11 answers) Closed 3 years ago . I am using Resharper 5.1 code analysis many a times i get a comment from resharper as "Event unsubscription via anonymous delegate" #Part of Code if (((bool)e.NewValue)) { listView.PreviewTextInput += (o,args) => listView_PreviewTextInput(o,args,listView); } else { listView.PreviewTextInput -= (o, args) => listView_PreviewTextInput(o, args, listView); } How could i correct or optimze

问题 I am currently having a problem using the MouseDragElementsBehavior from the Blend SDK when using a ItemsControl and a Custom Canvas. My custom canvas simply adds or removes the MouseDragElement from its children depending on a DependencyProperty. This worked just fine when I was manually adding Items to the Canvas' children but appears to have broken when moving to an ItemsControl. I am currently using the following ItemsControl code: <ItemsControl ItemsSource="{Binding Path=CanvasItems}">

问题 I've tried using VisualStateManager.GetVisualStateGroups in the OnAttached override of my custom behavior, as well as in an event handler added to AssociatedObject.Loaded event in that behavior. Both times I get an empty list. Is there another way to get the visual state groups defined for a control, or another event handler I should attach to? Be for it's asked, yes, the control has VisualStateGroups and VisualStates . 回答1: Usually the VisualStateGroups attached property is attached to the

问题 I have an InvokeCommandAction that I have that is attached to the GotFocus event of a TextBox like so: <TextBox Grid.Row="0" Grid.Column="1" Width="40" HorizontalAlignment="Right"> <i:Interaction.Triggers> <i:EventTrigger EventName="GotFocus"> <i:InvokeCommandAction Command="{Binding GotFocusCommand}" CommandParameter="Enter data [message to be displayed]" /> </i:EventTrigger> </i:Interaction.Triggers> </TextBox> It works just fine this way, but I have dozens of TextBox es with this same

问题 This question tells me what to do in words, but I can't figure out how to write the code. :) I want to do this: <SomeUIElement> <i:Interaction.Behaviors> <ei:MouseDragElementBehavior ConstrainToParentBounds="True"> <i:Interaction.Triggers> <i:EventTrigger EventName="DragFinished"> <i:InvokeCommandAction Command="{Binding SomeCommand}"/> </i:EventTrigger> </i:Interaction.Triggers> </ei:MouseDragElementBehavior> </i:Interaction.Behaviors> </SomeUIElement> But as the other question outlines, the

问题 I am trying to make an attached behavior to reorder rows bby doing Drag & Drop I found some solution (On Stackoverflow and by googling) and using them i am trying to make the behavior... I took the example from Hordcodenet website (i dont have the link now) Code public static class DragDropRowBehavior { private static DataGrid dataGrid; private static Popup popup; private static bool enable; private static object draggedItem; public static object DraggedItem { get { return DragDropRowBehavior

问题 Is it possible to attach behavior to all TextBoxes in Silverlight application? I need to add simple functionality to all text boxes. (select all text on focus event) void Target_GotFocus(object sender, System.Windows.RoutedEventArgs e) { Target.SelectAll(); } 回答1: You can override the default style for TextBoxes in your app. Then in this style, you can use some approach to apply a behavior with a setter (generally using attached properties). It would something like this: <Application

问题 I'm working on a WPF MVVM application. The thing that I'm noticing is that I have to write an inordinate amount of boilerplate code just to declare commands (through DelegateCommands from the WPF Team's MVVM Toolkit), attached properties and attached behaviors. Are there any strategies available to reduce the amount of boilerplate code I have to write? Thanks! 回答1: Personally, I like Josh Smith's MVVM Foundation library. He uses a class called RelayCommand there, but it sounds pretty similar

问题 Not finding a move event or redraw event in the FrameworkElement class. And Google not helping either. So... I have a custom ItemsControl populated by an observable collection in the VM. The ItemsControl itself leverages the <i:Interaction.Behaviors> <ei:MouseDragElementBehavior ConstrainToParentBounds="True"/> </i:Interaction.Behaviors> behavior so the user can drag around the whole assembly. When the user moves the assembly, I want to be notified by each item as the item is repositioned as