Recent questions tagged wpf

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wpf - MouseOver highlighting style returning to default after a second (Caused by Aero?)

I'd trying to style my ComboBoxes to match the rest of the UI but I'm having problems with the IsMouseOver highlighting. It highlights with the color I ... can I do to make the background color stay? 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 - Cannot convert type IEnumerable to ObservableCollection...are you missing a cast?

I'm trying to return entities where the bool "isAssy" is true: public ObservableCollection<MasterPartsList> ParentAssemblyBOM { get {return this._parentAssemblyBOM.Where( ... ...are you missing a cast?" See Question&Answers more detail:os...

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

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964 views

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wpf - Merged dictionaries in the App.xaml

I have a bunch of Xaml vector icons inside a separated .xaml. I load them inside my window using this directive: <Window.Resources> <ResourceDictionary> ... I can't have multiple properties Resource... See Question&Answers more detail:os...

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

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847 views

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wpf - How do I update an IValueConverter on CollectionChanged?

Here's a basic example to explain my problem. Let's say I have ObservableCollection<int> Numbers {get; set;} and an IValueConverter that returns the ... run when items are added and removed to Numbers? See Question&Answers more detail:os...

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

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929 views

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wpf - Bind command from Business object to View in MVVM

I populate DataGrid in WPF through MVVM. I have business object with 4 properties to create the Row and Columns in the DataGrid. <DataGrid ... not have information about items of the DataGrid? See Question&Answers more detail:os...

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

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763 views

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wpf - Custom styled listbox - how can I keep the style for a selected item?

I have a styled listbox. Listbox items change color when hovered over and when selected. Hover and select work fine. But when selecting an item ... "theControl" Style="{StaticResource myListBoxStyle}" /> See Question&Answers more detail:os...

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

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812 views

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wpf - Binding to ViewModel.SubClass.Property (sub-property)

let's say i have a section on my screen where "current record" is edited.. so my view model has a class with all currently edited ... this notation is correct: {Binding Path=CurrentRecord.Notes} 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 - Programmatically add style trigger

Can anyone please help how to programatically add the following style: <style> <style.Triggers> <Trigger Binding="{Binding CustomerId}" Value ="1"/> <setter ... Value="Red"/> </style.Triggers> </style> See Question&Answers more detail:os...

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

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835 views

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wpf controls - Can I explicity show tooltip on Mouse Click event in WPF?

I am showing a Tool Tip when Mouse hovers on Help image. The xaml is given below: <Image x:Name="HelpImage" Width="16" Height="16" Grid.Row="1 ... ToolTip when user clicks on the image ? Please Help!! See Question&Answers more detail:os...

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

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985 views

1 answer

wpf - Can you replace characters in a textbox as you type?

We are looking for a way to make a textbox replace certain characters as a person types in it. Note, we are focusing on the control itself, not bindings, ... as you type. Hope that makes more sense now. See Question&Answers more detail:os...

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

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703 views

1 answer

wpf - TriState Checkbox - how to change the order of the states

I have a CheckBox in my application that is using the TriState mode. The normal behavior for this mode seems to be cycling between null, false, true. ... sure I'm missing something that should be obvious. See Question&Answers more detail:os...

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

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896 views

1 answer

wpf - Having TextChanged Event Fire Immediately as Text is Typed into TextBox

On a wpf TextBox that has an TextChanged event, it seems to only fires when focus is taken away from the textbox; but not as individual characters ... into the textbox, rather than when focus changes? See Question&Answers more detail:os...

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

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790 views

1 answer

wpf - 'Cannot find governing FrameworkElement...' warning when binding inside DataTemplates

I'm getting this warning in Visual Studio output window when binding on a SolidColorBrush property inside a DataTemplate: System.Windows.Data Error: 2 : ... on a RotateTransform object. 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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899 views

1 answer

wpf - Stick to the bottom of a StackPanel

In my window, there is a Grid that takes up 100% of the available vertical space. Inside that Grid is a StackPanel with another StackPanel and a Frame ... be a StackPanel, it can also be a DockPanel. See Question&Answers more detail:os...

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

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597 views

1 answer

wpf - Combo-box loses selection after collection changes

I have a WPF combo box bound to an obvserable collection (OC): <ComboBox Name="cbCombination" ItemsSource="{Binding Combinations}" SelectedIndex="0" /> ... of the combo unless the events fire. :( See Question&Answers more detail:os...

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

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911 views

1 answer

wpf - How to Play Transparent background avi file in media element?

I have a video with transparent background in .avi format (Made from Adobe After Effects), but the transparent background appears black in mediaelement. Media ... my approach is wrong please let me know. See Question&Answers more detail:os...

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

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808 views

1 answer

wpf - How can I style a DataGridCell's content based on binding without naming that binding

I would like to create a style that makes my cell's content green if positive, red if negative or black if 0. I know about converters and bindings, but ... I can select the property I'm basing this on. 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

1 answer

wpf - How can I access a ListBox within a TabControl.ContentTemplate?

In my code behind I set the MessageBoxTabControl.ItemsSource to an Observable Collection. <TabControl x:Name="MessageBoxTabControl"> <TabControl.ContentTemplate> < ... get a reference to my ListBox? See Question&Answers more detail:os...

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

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971 views

1 answer

wpf - Missing "Run as Administrator" in VS Installer's Shortcut

I created a shortcut from the application .EXE in Visual Studio Installer, but the resulting shortcut did not have the option of "Run as Administrator ... as Administrator" option enabled on right-click? 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

1 answer

wpf - ListView Selected Item Style Override

I have a WPF ListView that I'm trying to apply a custom style too... primarily I want to make the background of the listview box transparent ... > </DataTemplate> </ListView.ItemTemplate> </ListView> See Question&Answers more detail:os...

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

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872 views

1 answer

wpf - The calling thread cannot access this object because a different thread owns it

i have a problem whenever i Refresh the prograss bar i get the error The calling thread cannot access this object because a different thread owns it ... ); worker2.ReportProgress((int)percentageDone); };` See Question&Answers more detail:os...

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

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674 views

1 answer

wpf controls - WPF Textblock translation based on reference point

Please check the attached image. I made the textblock origin to it's center by RenderTransformOrigin="0.5,0.5". Now I would like to move ... TranslateTransform, but this case I need absolute transform. See Question&Answers more detail:os...

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

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960 views

1 answer

wpf - Specified element is already the logical child of another element. Disconnect it first”

i have user control that contain grid and inside it there is expander the problem is when i try to open new window that uses this user control i get an ... > </GroupBox> </Grid> </Grid> </UserControl> See Question&Answers more detail:os...

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

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689 views

1 answer

wpf - Selection bug for listbox where the list items are value types / structs and contain duplicates?

I turned an Horizontal ItemsControl to a Listbox so that I am able to select individual items but found that the selection was broken. Took some time ... when list items are strings (value type semantics) See Question&Answers more detail:os...

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

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870 views

1 answer

wpf - Binding to the "object.GetType()"?

I have an ObservableCollection<object> Let's consider we have 2 items in it : int a = 1; string str = "hey!"; My xaml file acces to it via ... in my TextBlocks is : int string Thanks for any help ! See Question&Answers more detail:os...

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

0 votes

964 views

1 answer

wpf - DataGridComboBoxColumn cell not displaying selected item text?

I was wondering how you get the DataGridComboBoxColumn to display the selected item text when it is not in editing mode? And ... > </DataGridComboBoxColumn.EditingElementStyle> </DataGridComboBoxColumn> See Question&Answers more detail:os...

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

0 votes

782 views

1 answer

wpf - Change disabled listbox background to gray

I have a ListBox which I need to gray out when it's disabled. Per user request it's not enough to disable it, but it also has to appear differently ... how to accomplish my task, I'd appreciate the help. See Question&Answers more detail:os...

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

0 votes

1.4k views

1 answer

wpf - Binding ObservableCollection<> to a TextBox

I have data comming back from web service in the form of a ObservableCollection<string> I want to bind the collection to a read-only TextBox so that ... ) { throw new NotImplementedException(); } } } See Question&Answers more detail:os...

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

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