Recent questions tagged WPF

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wpf - Error: 'Cannot create unknown type '{clr-namespace:NameSpace.Properties}Settings'.'

I define my settings and styles in a ResourceDictionary: <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/ ... line position '14'. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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880 views

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wpf - Set style for all textblocks in a stack panel

Let's say I have two different, distinct stack panels (we'll call them SPA and SPB), each with 10 textblocks ... applies to XAML/WPF in general. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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686 views

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wpf - ControlTemplate with DataTrigger Vs. DataTemplate with DataTemplateSelector

I have a generic control which displays an editor based on the type property inside a ViewModel. Currently ... performance difference in two? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wpf - How to bind ApplicationCommands to a ViewModel?

I have successfully used a few custom commands using MVVM-Light, but I want my application to respond to the ... ., in the data templates? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wpf - Backwards Compatibility of .NET Framework 4

We have an WPF Application build on .net framework 3.5. Some testers find if they uninstall .net ... backward compatibility is ruined? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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702 views

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wpf - ComboBox ItemsSource changed => SelectedItem is ruined

Ok, this has been bugging me for a while now. And I wonder how others handle the following case: <ComboBox ItemsSource="{ ... ]); } }; } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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856 views

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wpf - Function call within XAML code?

I'd like to set a style on all my TextBox controls that does the following when it receives keyboard focus: 1) ... call .SelectAll() ? Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wpf controls - How Can I Open a WPF Popup with a Delay?

I simply want to open up the WPF Popup with a delay, sort of like a ToolTip. How can I achieve this? And, ... at least half a second in there. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wpf - How can I validate multiple properties when any of them changes?

I have two date fields: StartDate and EndDate. StartDate must be earlier than EndDate. If the user changes ... date returns a validation error. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wpf - How perform calculation on a XAML Binding value: reverse it, multiply it, subtract from it or add to it?

First; the question is rhetorical, I have an answer! I have gotten so much help from looking here that I wanted ... width of a parent - 68px. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wpf - Get Selected TreeViewItem Using MVVM

So someone suggested using a WPF TreeView, and I thought: "Yeah, that seems like the right approach." Now, hours ... item to my view model?" See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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950 views

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wpf - Difference between Bubbling and Tunneling events

What is the exact difference between Bubbling Events and Tunneling events? Where should I use Bubbling Events and ... ? Thanks in Advance! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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737 views

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wpf - What goes in Model in MVVM?

The things which are supposed to go into the Model are also allowed to go into the View-Model i.e. Public ... should actually go into the model? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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wpf - Why can't I select a null value in a ComboBox?

In WPF, it seems to be impossible to select (with the mouse) a "null" value from a ComboBox. Edit To clarify ... doesn't work in WPF's ComboBox? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wpf - How to restore a minimized Window in code-behind?

This is somewhat of a mundane question but it seems to me there is no in-built method for it in WPF. ... post my current solution as answer) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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741 views

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wpf - Looking for Prism example of Modules loading themselves into a menu

Does anyone know of WPF code examples using Prism in which modules each register themselves as a menuitem in a menu ... to do it in Prism? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wpf - how to sort ObservableCollection

I have a an ObservableCollection and a WPF UserControl is Databound to it. The Control is a graph that shows ... of items in colection. Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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968 views

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wpf - How to locate the source of a binding error?

How can I figure out what line of xaml contains the troublesome binding When my debug output is full of lines like ... no easy way to tell). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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855 views

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wpf - How to make a simple hyperlink in XAML?

All I want to do is make a little hyperlink in XAML. I've tried everything. I give up. What is the ... during the learning process with XAML. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wpf - How to hide the empty TextBlock?

In the XAML provided below, I don't have the value for Phone sometimes. When that happens, the value is missing, ... I do to achieve my goal? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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714 views

1 answer

wpf - Interaction of view models in MVVM

I have a WPF application which follows the MVVM pattern. The application defines two views and view models so ... with a different approach. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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839 views

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wpf - How to do multiple shells in my Prism app (like MS Office)?

I try to create an application that has a window behaviour as MS Office, for example Word/Excel. The user opens ... and how to call this code? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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950 views

1 answer

wpf - ICommand vs RoutedCommand

Let's have a button Command property bound to a custom command. When should I implement ICommand and when ... suits better for this purpose? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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868 views

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wpf - What is the template binding vs binding?

I could not understand BorderThickness="{TemplateBinding BorderThickness}. Here the code: <ControlTemplate TargetType="{x ... types of binding. See Question&Answers more detail:os...

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

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742 views

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wpf - Good examples of MVVM Template

I am currently working with the Microsoft MVVM template and find the lack of detailed examples frustrating. ... MVVM Light Toolkit Messenger See Question&Answers more detail:os...

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

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823 views

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wpf - How to correctly add icon or image to each menu item inside Mahapp DropDownButton

I am using Mahapp's DropDownButton Here is what I have: using xmlns:mah="http://metro.mahapps.com/winfx/xaml ... How to convert object to Image? 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 - What do image source paths mean in xaml?

I'm looking at the source code for the project I'm working on in Visual Studio, and the paths look weird in the ... is. What does it all mean? See Question&Answers more detail:os...

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

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915 views

1 answer

wpf - WPF4 DataGridHeaderBorder in a xaml Style

Making a separate question, related to comments on the answer to WPF 4: What happened to DataGridColumnHeader? It ... remove the dg: hack. See Question&Answers more detail:os...

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

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