Recent questions tagged WPF

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wpf - Detect if any key is pressed in C# (not A, B, but any)

[EDIT 3] I kind of "solved it" by at using the "strange" version. At least for the most important keys. It is ... .Add(key); return this; } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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852 views

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wpf - How to cancel an edit to an object using MVVM?

How can I implement cancelation of editing an object using MVVM. For example: I have a list of customers. I ... to its previous state in MVVM? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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741 views

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wpf flat button

How to make a button flat style in wpf? I've tried BasedOn property but it does not work. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

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wpf - Can you define multiple TargetTypes for one XAML style?

In HTML/CSS you can define a style which can be applied to many types of elements, e.g.: .highlight { color:red ... to leave it open as in CSS? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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wpf - TabItem in a separate XAML

Is it possible to put a TabItem into a separate XAML and reference something like this: <TabControl> <local:MyTabItem/> ... how can I do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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799 views

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wpf - How do I dynamically bind and statically add MenuItems?

I'm binding the ItemsSource of my MenuItem to an ObservableCollection in my ViewModel. Here is my xaml: <MenuItem ... code behind. Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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532 views

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wpf - How can I implement fading in and out of Added/Removed ListItems

Suppose I have a ListBox bound to an ObservableCollection and I want to animate adding/removing of ListBoxItems eg. ... How can I do that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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776 views

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wpf - How can I define a variable in XAML?

I have the following two buttons in XAML: <Button Content="Previous" Margin="10,0,0,10"/> <Button ... theMargin},{Variable theMargin}"/> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wpf - MenuItem style with icon creates only one icon

Im having a problem rendering icons for a dynamic menu which uses viewmodels as an ItemsSource. The solution I've ... in the menu. Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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916 views

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wpf - How to use AlternationIndex in ItemsControls?

I have seen some articles that show how to use AlternationIndex with ListBoxes or ListViews, but I had spent a few ... obvious I am missing... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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804 views

1 answer

wpf - How can I sort a ListBox using only XAML and no code-behind?

I need to sort the strings in a ListBox, but it is bound to the view model by another component via the ... the instantiation of the view model. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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wpf - How to get TreeViewItem from HierarchicalDataTemplate item?

I have a TreeView which uses a HierarchicalDataTemplate to bind its data. It looks like this: <TreeView x:Name=" ... How can I do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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wpf - What is the actual task of CanExecuteChanged and CommandManager.RequerySuggested?

I got the following code from Josh Smith's MVVM tutorial. Can anyone provide a quick explanation of what ... the RelayCommand Class from here. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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896 views

1 answer

wpf - ElementName Binding is failing

I have the following XAML: <Grid> <Grid.RowDefinitions> ... </Grid.RowDefinitions> <DataGrid Grid.Row="0" ... ' (type 'Nullable`1') See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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743 views

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wpf - TabControl with Add New Tab Button (+)

What is the proper way of adding a '+' button tab at the end of all the tab items in the tab strip ... them satisfy all the above five points. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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620 views

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wpf - Difference between Label and TextBlock

According to the Windows Applications Development with Microsoft .NET 4 70-511 Training Kit What is the difference ... and just displaying text? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

wpf - How to automatically scale font size for a group of controls?

I have a few TextBlocks in WPF in a Grid that I would like to scale depending on their available width / ... " and no longer aligns center. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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669 views

1 answer

wpf - CommandManager.InvalidateRequerySuggested() isn't fast enough. What can I do?

Short Version Calls to CommandManager.InvalidateRequerySuggested() take far longer to take effect than I would like (1-2 ... . Any ideas? :-) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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833 views

1 answer

wpf - Creating an image+text button with a control template?

I am tired of creating the same image+text button over and over again, and I would like to move the markup ... I set up the template bindings? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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760 views

1 answer

wpf - Bind an element to two sources

I currently have two text boxes which accept any number. I have a text block that takes the two numbers ... be more efficient and easier. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

983 views

1 answer

wpf - How to disable highlighting on listbox but keep selection?

I am having trouble finding how to not allow my ListBox to highlight the item selected. I know that I ... BorderBrush="Transparent"> </ListBox> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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927 views

1 answer

wpf - How have you successfully implemented MessageBox.Show() functionality in MVVM?

I've got a WPF application which calls MessageBox.Show() way back in the ViewModel (to check if the user ... Boxes in your MVVM applications? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

wpf - Change Data template dynamically

I have a item control which is bound to Tasks. Each task has task state. I have defined different data ... template. 2. Visual State Manager See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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744 views

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wpf - Is Josh Smith's implementation of the RelayCommand flawed?

Consider the reference Josh Smith' article WPF Apps With The Model-View-ViewModel Design Pattern, specifically the example ... -= value; } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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598 views

1 answer

wpf - How can I have a ListBox auto-scroll when a new item is added?

I have a WPF ListBox that is set to scroll horizontally. The ItemsSource is bound to an ObservableCollection in my ... an event that does this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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621 views

1 answer

wpf - Datacontext conflicts

<UserControl x:Class="WatermarkTextBox" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x=" ... .DataContext = this; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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714 views

1 answer

wpf - Why are .NET property wrappers bypassed at runtime when setting dependency properties in XAML?

I am reading Adam Nathan's book "WPF 4 Unleashed" and there is the following warning on page 82 ... dependency property identifier ABCProperty. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

wpf - Static property using INotifyPropertyChanged. C#

I am trying create a static property where INotifyPropertyChanged will update any changes made to a DataGrid ComboBox ... (propertyName)); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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