WPF. Change DataContext on event binding to access code-behind on a MVVM project
wpf,mvvm,code-behind,datacontext
Validation.Error is an event, not a property. You can't set Bindings to events. You can use things like MVVM Light's EventToCommand, or Microsoft's own Interactivity EventTrigger to associate Commands to Events. But there really isn't anything wrong with just adding a regular event handler in code-behind and calling some viewmodel...
Setting App.xaml-resources' value from codebehind
Color is a structure, which means it is passed by value, not by reference. You are basically making copies of the colors, modifying those copies, and then letting them go out of scope and get deleted. You should put the colors into the resource dictionary by doing something along the...
System.Windows.Interactivity must be referenced in the main project
System.Windows.Interactivity.dll is not in the GAC, so .Net doesn't know where to find it. By adding a reference to your main project, you make the build system copy the DLL to the output folder. This lets the runtime find it....
Can not get Databinding to work (I Have read many posts and can not figure out what I am doing wrong)
Your resources are available in the code behind through the Resources property, which is the merged dictionary of resources. Your item will be available through the key that you've given it. Assuming that your example code for setting the FullName property is in your Window code behind, the following code...
Items inside custom panel not getting arranged properly
The solution was the easiest in the world. I need to use the NewsFeedPanel as ItemsPanel instead of a wrapPanel. Thanks Clemens for the suggestion.
TwoWay Binding is not working if Binding is changed from DataTrigger
wpf,datatemplate,datatrigger,2-way-object-databinding
Your answer can be found in the Dependency Property Value Precedence page on MSDN. In short, you have set a local value on the IsOpen property and that has a higher precedence than the value set by the Trigger. The solution is to not set the local value, but to...
Gracefully handling expected BindingExpression errors
wpf,xaml,data-binding,wpf-controls
Your 'null' item should simply be an item in your collection (of the same type as the rest of the items) that has no properties set, or at least no properties that are displayed. That way, you can avoid the Binding errors all together, because your 'null' item will have...
How to access file from another function
You can simply have a private variable outside of the Button_Click1 method which will hold the chosen file names. string[] files; private void Button_Click1(object sender, RoutedEventArgs e) //BROWSE BUTTON { Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog(); dlg.Multiselect = true; dlg.FileName = "Document"; dlg.DefaultExt = ".txt"; dlg.Filter = "Text documents (.txt)|*.txt"; Nullable<bool>...
Change Background image in WPF using C# [duplicate]
c#,wpf,image,background,resources
Firstly, add a Folder to your Solution (Right click -> Add -> Folder), name it something like "Resources" or something useful. Then, simply add your desired image to the folder (Right click on folder -> Add -> Existing item). Once it's been added, if you click on the image and...
WPF Program reopens by itself
After a long time I finally figured out what the real problem was - my Antivirus program Avast! was running the app in a sandbox mode (normally it notifies when running program in a sandbox mode, however not with this one), and once it finished testing the program (after approximately...
How to get data from combobox from datagrid in WPF?
I think you're confusing stuff. I assume you want your State items to have a string Measure property, and not a collection of them, but you want to be able to select the Measure value from a Combo with several options... If that's the case, then you should redefine your...
HorizontalContentAlignment does not appear
StackPanel has a property called as "FlowDirection". Is this what you are looking for? <StackPanel Orientation="Horizontal" DockPanel.Dock="Top" Background="Yellow" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0,2,2,0" Name="MainButtonsPanel" Width="400" FlowDirection="RightToLeft"> ...
Add stack panel when check box is checked
What you can do is create the StackPanel in the xaml markup itself with the Visibility set to Collapsed and just toggle the visibility of the StackPanel on the check event of CheckBox
WPF DataGrid Trigger on cell content
You can't access DataGridCell.Content that way, use a DataTrigger instead based on your DataGrid.SelectedItem.YourProperty like this: <DataGrid.CellStyle> <Style TargetType="DataGridCell"> <Setter Property="FontWeight" Value="Bold" /> <Style.Triggers> <DataTrigger Binding="{Binding YourProperty}" Value="0"> <Setter Property="FontWeight" Value="Normal"/> </DataTrigger> </Style.Triggers> </Style> </DataGrid.CellStyle> EDIT: Assuming your DataGridColumns are text-based then you can...
How to bind and refresh UserControl binding in WPF?
c#,wpf,mvvm,data-binding,user-controls
This is a common misconception. When a DependencyProperty's value changes, the code in its CLR property's set is not executed. You need to use a PropertyChanged callback if you want to execute some code whenever the property value changes. Your UserControl code should look like this, instead: public static readonly...
Refactoring INotifyPropertyChanged Setters
c#,wpf,inotifypropertychanged,getter-setter
Yes, it will. You're still going to be a little sick of writing private backing fields and repetitive parts though: private int _foo; public int Foo { get{return _foo;}, set { SetProperty("Foo", ref _foo, value); } } you can't easily escape from that. INPC works based solely on three things:...
Binding string lists into wpf listview returns BindingExpression path error
But you aren't binding a list of strings to a ListView, you are binding an IEnumerable<String> to a TextBlock.Text field, when it is expecting a String as you can see in the errors. The fastest way to solve your problem is to change the line to this.AInfoLv.Items.Add(new { Label=" "...
Choose Style depending on property
You can accomplish something like this with DataTamplates: <Window x:Class="StackSimpleSample.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525"> <Grid> <Grid.Resources> <Style x:Key="RedStyle" TargetType="TextBlock"> <Setter Property="Foreground" Value="Red"/> </Style> <Style x:Key="GreenStyle" TargetType="TextBlock"> <Setter Property="Foreground"...
EntityFramework 6 / SqlCe 4 SaveChangesAsync()
c#,wpf,multithreading,entity-framework,sqlce
After some more testing it appears that I shouldn't be using the await keyword in he call to the async method. Executing the call like this: Task.Run(() => PerformContextSubmitAsync()); Doesn't block the original calling thread, but it doesn't seem to actually execute in an asynchronous fashion. It seem to behave...
Should I be using more than one viewmodel for a database table?
As usual the answer is ain't common, it depends on how you really want to implement it. But for the sake of patterns and organized code, i would recommend that you have: Separate Viewmodel per view: each viewmodel should only contain as many data as many you want to display/work...
WPF : How to bind Button's visibility inside ListBox ItemsControl using selecteditem information ?
c#,wpf,listbox,itemscontrol,selecteditem
I attached a simple example to show button in listbox item when you selected. it should have to bind as RelativeSource and have to use Converter Example: <Window.Resources> <BooleanToVisibilityConverter x:Key="booleanVisibleConverter" /> </Window.Resources> <Grid> <ListBox ItemsSource="{Binding ObservableCollection}" Grid.Row="0" SelectedItem="{Binding Path=Item}" SelectionMode="Single" IsSynchronizedWithCurrentItem="True" Margin="1" ScrollViewer.HorizontalScrollBarVisibility="Disabled" SelectedIndex="0">...
tool tip content change getting applied to all elements
I suspect the issue has to do with how xaml resources work. Since you are creating a ToolTip instance inside of a style setter, you are likely only ever creating one ToolTip and assigning it to every GridSplitter that uses that style. You could try adding x:Shared="false" to your style...
Zoom into ListView contents without also scaling scroll bars
You could use the always handy FindChild<T> function to retrieve the ScrollContentPresenter inside the ListView, and use your zooming function with it. public Control() { InitializeComponent(); this.Loaded += new RoutedEventHandler(Control_Loaded); } private void Control_Loaded(object sender, RoutedEventArgs e) { var presenter = FindChild<ScrollContentPresenter>(listView, null); var mouseWheelZoom = new MouseWheelZoom(presenter); PreviewMouseWheel +=...
WPF add new Slider style cause XamlParseException
These Styles reference other Styles and Templates via StaticResource: MyFocusVisualStyte (Typo? Shouldn't it be MyFocusVisualStyle?), SliderThumbStyle, SliderRepeatButtonStyle, HorizontalSlider, VerticalSlider... All these Styles and Templates must exist and be defined BEFORE they're used. In this case, the resources must be defined in this order (I'll copy only the first node of...
How to get the appropriate ComboBox Tag
If you see the Tag is setting for the combo box itself and not for its individual item. You can build a dictionary and use it as datasource of your combo box. Specify the value and display members of the combo box with dictionary key and value attributes Try modifying...
HttpClient returning special characters but nothing readable
client.DefaultRequestHeaders.TryAddWithoutValidation("Accept-Encoding", "gzip, deflate"); With this you tell the server that you allow it to compress the response gzip/deflate. So the response is actually compressed which explains why you get the kind of response text you get. If you want plain text, you shouldn’t add the header, so the server won’t...
ContentPresenter in ItemControl.ItemTemplate to show displaymemberpath of itemscontrol
c#,wpf,itemscontrol,contentpresenter
I found an easier way to solve this problem by using horizontal listbox. Thanks for responses
ItemsSource bind to collection stays empty
In order to observe changes in a collection WPF provides the ObservableCollection class which implements INotifyCollectionChanged and INotifyPropertyChanged. Replace List<T> with ObservableCollection<T> and your code should work.
How can i make this CommandParameter work?
c#,wpf,xaml,binding,commandparameter
<Window x:Class="WpfApplication2.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mine="clr-namespace:WpfApplication2" Title="MainWindow" Height="350" Width="525"> <Grid> <mine:SquareControl Coordinates="{Binding VMCoordinates, Mode=TwoWay}"/> </Grid> </Window> In this case the namespace 'mine' is the namespace of your app. So in the main window the line inside the grid says "Place an instance of SquareControl in my view...
CefSharp.Wpf WebView cannot accept input and the link clicked no response
Finally, I got the answer from https://github.com/cefsharp/CefSharp/issues/1080#issuecomment-111969127 I am sorry post the duplicate thread online. With the amaitland's help. I resolved this issue. We just needed remove OnMouseLeftButtonDown method. Thanks for your time....
finding file in root of wpf application
c#,xml,wpf,visual-studio,relative-path
First, ensure that the file is definitely copied into your output ./bin/ directory on compile: This worked perfectly for me in my WPF application: const string imagePath = @"pack://application:,,,/Test.txt"; StreamResourceInfo imageInfo = Application.GetResourceStream(new Uri(imagePath)); byte[] imageBytes = ReadFully(imageInfo.Stream); If you want to read it as binary (e.g. read an image...
WPF: why my slider not show the minimum value on my label
The problem is with your ContentStringFormat Change the ContentStringFormat to Like this <Label Name="lblSliderSpeed" Content="{Binding ElementName=speedSlider, Path=Value, UpdateSourceTrigger=PropertyChanged}" Grid.Column="1" VerticalAlignment="Bottom" HorizontalAlignment="Right" ContentStringFormat="{}{0:00}"/> And No code Required In page Behind. Because,The "#" custom format specifier serves as a digit-placeholder symbol. If the value that is being formatted has a digit in...
WPF/XAML ResourceDictionary with blank space
You can add xml:space="preserve" to your resource. This will, like it says, preserve the space. <System:String xml:space="preserve" x:Key="NumStartsTotal">Total: </System:String> More info here and here....
BooleanToVisibilityConverter works on Textblock and not on UserControl
wpf,xaml,binding,windows-phone-8.1
The problem is the use of DataContext. Your MainPage has a DataContext : DataContext="{Binding Main, Source={StaticResource Locator}}" LoadingView also has a DataContext So, when you write this code : You try to find Test2 as a field in the DataContext of the LoadingView because you're in the same View. To...
In WPF how can I control whether another button clicked
if you want to use same Click handler for two button, try this: private void btnDashboard_Click(object sender, RoutedEventArgs e) { Button btnSender = sender as Button; if(btnSender.Name == "btn1") { //Code for Button1 } else { //Code for Button2 } } Also make sure each button has a Name property...
Changing color of positionmarker/caret
To modify the color of the caret (which assume is what you call "positionmarker") you have to set the CaretBrush property of the TextBox.
WPF ObservableCollection two way binding XML file
manually do the add, update, and delete myself Please don't delete yourself. ;-) Xml node processing is a complex process and does not easily lend itself to such a scenario as adding and deleting from a string list which is what the question is patterning itself off of.... At...
CollectionView: Filter does not work when binding to e. g. ListBox
The very first line in the remarks section of the documentation for the CollectionView class says: You should not create objects of this class in your code. So, I am guessing it is probably not designed to be used the way you are using it. I always use CollectionViewSource.GetDefaultView(collection) (which...
Custom WPF DataGrid with optional button column
c#,wpf,xaml,datagrid,custom-controls
I had to remove the section from the Generic.xaml style for the DataGrid to properly layout and created the column in code. protected override void OnInitialized(EventArgs e) { base.OnInitialized(e); CloneColumn.Visibility = ShowCloneColumn ? Visibility.Visible : Visibility.Hidden; } private DataGridTemplateColumn _cloneColumn; private DataGridTemplateColumn CloneColumn { get { if (_cloneColumn == null)...
WPF style info from external text file
just hold the color values in a config file simple text file will suffice. though you can use VisualStudio Resource file.. file will contain lines in each: item_enum_name item_type item_value for example: main_screen_bg_color Color Black company_logo URI \logos\logo1.jpg and so on.. just load the file parse it and use bind...
WPF maximize main window with center for application
Set the WindowState property instead of Width and Height: mainWindow.WindowState = WindowState.Maximized; ...
Validation on Radio Buttons
c#,wpf,validation,data-binding,radio-button
In my opinion you have 2 solutions: the first one - the easiest one - is to set a default for Gender property. In this way one among the two radiobuttons will be check and the "required" attribute will be always satisfied. The second solution is to "mask" a ListView...
WPF bindings do not pick up any changes
c#,wpf,xaml,mvvm,inotifypropertychanged
You are not changing the value of the TestString, you are assigning a command to change the value but you do not seem to be executing it. this.RunCommand = new RelayCommand(this.RunAction); Bind that command to something or execute it manually from somewhere. Also you need to assign the property not...
JSON Deserialization Exception
You're trying to deserialize it into a list of RootObject but in reality the JSON is just a single root object. Try RootObject obj = JsonConvert.DeserializeObject<RootObject>(responseText); instead. And then of course you need to change your for loop because obj is no longer a List<>. If you want to iterate...
orderby () containing numbers and letters
c#,wpf,linq,linq-to-sql,sql-order-by
Given your example data where the first number is always a single digit: allScenes.OrderBy(x => x.SceneNumber).ToList() If you can possibly have multi-digit numbers, please provide them and where you want them in the sort order. This is one way to sort multiple digit numbers: var allScenes = new[]{ new {SceneNumber="4B"},...
MahApps - How to disable automatic uppercase of default button
You can override the default value by setting the property for all buttons in Window.Resources <controls:MetroWindow ... xmlns:controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Window.Resources> <ResourceDictionary> <Style TargetType="{x:Type Button}" BasedOn="{StaticResource {x:Type Button}}"> <Setter Property="controls:ButtonHelper.PreserveTextCase"...
Open popup at the location of the button clicked
You can use a Popup control, coupled with it's Placement property to display your popup based on the current location of your buttons. <Popup Placement="Top" PlacementTarget="{Binding ElementName=yourButton}" ... /> Inside your Popup, you can place your UserControl or any content element which will act as the popup's content. See here...
Adding table header to Listview with DataTemplate in XAML
c#,wpf,xaml,listview,windows-runtime
If you have to use ListView then this is how it works: <ListView Margin="120,30,0,120" ItemsSource="{Binding MainViewModel}" Grid.Row="1"> <ListView.View> <GridView> <GridViewColumn DisplayMemberBinding="{Binding Data, Mode=TwoWay}" Width="100" Header="Column 1" /> <GridViewColumn DisplayMemberBinding="{Binding Year, Mode=TwoWay}" Width="100" Header="Column 2" /> <GridViewColumn DisplayMemberBinding="{Binding Month, Mode=TwoWay}" Width="100" Header="Column 3" /> <GridViewColumn...
WPF Navigation using MVVM
The AncestorType should be MainWindow not MainViewModel. MainViewModel is not a class that is part of the visual tree.
C# Delete Row with Dynamic Textbox/Button/Grid
WPF's ItemsControl is the correct way to show items in your views when the number of items can change. Many controls inherit from ItemsControl, like the ComboBox itself, or the DataGrid, or the ListBox... But in this example I'll use ItemsControl directly, since what you're trying to do doesn't need...
Converting InkCanvas Strokes to a Byte Array and back again
c#,wpf,bytearray,converter,inkcanvas
My problem was that I didn't serialize the output to the saved file and thus the when I loaded that file deserializing it tripped an error. Here is the correct code: private void SaveByteArrayToFile(byte[] byteArray) { var dialog = new System.Windows.Forms.FolderBrowserDialog(); string filepath = ""; if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK) {...
WPF 4.5: How to create child thread and continue task to UI main thread?
c#,wpf,background-process,caliburn.micro
To start a background task you can use Task.Run method. And to execute a code in the main thread you can use Dispatcher of the page (in case of VM context I have placed call of Application.Current.Dispatcher) public class MainViewModel: Screen { public MainViewModel() { Task.Run(() => { while (!ConnectServer())...
WPF 'Set property 'System.Windows.ResourceDictionary.DeferrableContent' threw an exception.'
Found the solution. Removed MetroDark.MSControls.Toolkit.Implicit.xaml which was not needed and also deleted the Reference to the WPFToolkit Dll....
C# XAML - How to add a combobox to some datagrid ROWS but not others?
Try using a DataTrigger with predefined DataTemplate items: <DataTemplate x:Key="OneItem" DataType="{x:Type ValueItem}" > <TextBox Text="{TemplateBinding Id}" /> </DataTemplate> <DataTemplate x:Key="MultiItems" DataType="{x:Type ValueItem}" > <ComboBox ItemsSource="{TemplateBinding ValueItems}" DisplayMemberPath="ValueName" SelectedValuePath="ID" SelectedValue="{TemplateBinding Id}" /> </DataTemplate> And then use a Content control to place the style accordingly. I haven't tried this but your data...
WPF PRISM - Display multiple pop-up view on the same time
It turned out that the solution is easier than I expected. Here is the solution in case if enybody needs it. I just had to modify the RegionPopupBehaviours to use AllActiveregion instead of the original SingleActiveRegion and in the DialogActivation I had to remove the first call to the CloseContentDialog....
WPF routedevent storyboard begin only if height is zero
wpf,storyboard,wpf-controls,routed-events
You may use a DoubleAnimation instead of an ObjectAnimationUsingKeyFrames. By only setting its To property, but not From, the animation starts from the current property value. It requires that you also set an initial value of the Height of the Border: <Border Height="20" ...> <Border.Triggers> <EventTrigger RoutedEvent="MouseLeftButtonUp"> <BeginStoryboard> <Storyboard> <DoubleAnimation...
Change two lists simultaneously
Here is a variation of your code, the points to note are: Model: refactored to be more object oriented and closer to real world situations, it is now a parent-child relationship between objects View Model: now implements INotifyPropertyChanged to notify framework elements about changes causing then to update its binding...
Bind Control to Two properties
Since The View-Model is an abstraction of the view that exposes public properties and commands, it doesn't make a lot of sense for a view to have two view-models the way you explained. It'll be more rational if there is a VM class as the view-model of your view that...
Aligning StackPanel to top-center in Canvas
If you don't want any input or hit testing on a certain element you should set the IsHitTestVisible property to false: <Grid> <Canvas Name="Canvas" Background="#EFECCA"> <DockPanel VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Width="{Binding ActualWidth, ElementName=Canvas}" Height="{Binding ActualHeight, ElementName=Canvas}" MouseLeftButtonDown="DockPanel_MouseLeftButtonDown" TouchDown="DockPanel_TouchDown" Panel.ZIndex="2" Background="Transparent"> </DockPanel> <Button Width="50" Height="50"...
Validate a field only if it is populated
You can implement your OptionalPhoneAttribute based on the original PhoneAttribute: public sealed class OptionalPhoneAttribute : ValidationAttribute { public override bool IsValid(object value) { var phone = new PhoneAttribute(); //return true when the value is null or empty //return original IsValid value only when value is not null or empty return...
WPF: static INotifyPropertyChanged event
Instead of a static counter you should have a view model with a collection of Person objects public class ViewModel { public ObservableCollection<Person> Persons { get; set; } } and bind the ItemsSource property of the ListView to this collection. <ListView ItemsSource="{Binding Persons}"> ... </ListView> You could now bind to...
WPF: after add WPF Toolkit DLL
At the end of the opening Window tag, the tutorial's code imports the namespace your are talking about. Do you have the following XAML in your opening Window tag? xmlns:chartingToolkit= "clr-namespace:System.Windows.Controls.DataVisualization.Charting; assembly=System.Windows.Controls.DataVisualization.Toolkit" If you are unfamiliar with referencing CLR namespaces from XAML, I strongly recommend reading this MSDN introduction on...
return to previous window on WPF
Change the way you show your windows like this: private void Window1_Click(object sender, RoutedEventArgs e) { Hide(); new Window1().ShowDialog(); ShowDialog(); } And use the DialogResult property to hide your windows (except the main window): private void btn_Cancel_Click(object sender, RoutedEventArgs e) { DialogResult = false; } ...
WPF, DataGrid, clicked item/row does not highlight (blue background)
Here is the solution that works: private void tabControlOrganizer_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (tabControlOrganizer.SelectedItem != null) { if (e.Source is TabControl) { if (tabItemTrades.IsSelected) { dataGridTrades.ItemsSource = Queries.GetTradeList(dataContext); } SelectionChanged was the problem: In C# WPF, why is my TabControl's SelectionChanged event firing too often? In free time I...
WPF: 2 different label sizes in particular order alignment
To have such a result, your grid must be really small. I see at least 3 solutions to your issue: 1- Make your grid a bit bigger until it fits. 2- Put 2 columns in your grid, you'd put the number on the left column and the % on the...
WPF/MVVM setting UserControl.DataContext in XAML results in Object reference not set?
When you set the DataContext in XAML, the designer instantiates the object. Therefore the code in the object's constructor will be executed. If your constructor does anything fancy which may need to reference another class, or create objects, you will likely get errors, but only in design-time. There are a...
TextBlock hosted inside StackPanel/Grid won't Wrap
StackPanel stretches accordingly to the size of its content. So if you use Grid and with TextWrapping you can achieve the desired result <Grid> <TextBlock TextWrapping="Wrap" Text="Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus leo lectus, viverra ut lobortis vel, mollis eget lectus. Suspendisse laoreet consequat ultrices. Curabitur ultricies,...
WPF expander not expanded above buttons make buttons unclickable
I found a way of doing it, with code behind. I put my Expander in a Canvas and I added to my Expander two events: Expanded="searchMenuExpander_Expanded" and Collapsed="searchMenuExpander_Collapsed" which are defined as: private void searchMenuExpander_Expanded(object sender, RoutedEventArgs e) { Canvas.SetZIndex(searchMenuCanvas, 99); } private void searchMenuExpander_Collapsed(object sender, RoutedEventArgs e) { Canvas.SetZIndex(searchMenuCanvas,...
Overlapping Items in WPF ItemsControl
c#,wpf,xaml,user-interface,datatemplate
I found an answer that will work for my situation right here: http://stackoverflow.com/a/9687758/4912801 It turns out that setting the Panel.ZIndex property wasn't working because WPF inserts a ContentPresenter element for each item in the ItemsControl. In my application, I was trying to get whatever element the mouse is hovering over...
Stop TextBox in ScrollViewer from growing with content
This seems to be a common problem but I haven't found a satisfying solution on the net. Here is my solution: <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="50"/> <ColumnDefinition Width="*" MinWidth="100"/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> </Grid.RowDefinitions> <TextBlock Grid.Column="0" Text="test:"/> <local:TextBoxDecorator...
How to draw something in DrawingVisual with millimeter unit instead of pixels?
In WPF, you can't even draw something in pixel units without at least some extra effort. WPF uses "device independent units" where each unit is 1/96th of an inch. Even that is only a theoretical relationship, as it depends on the display device correctly reporting its resolution, which in turn...
Change ImageBrush Imagesource programmaticaly with conditions (WPF)
c#,wpf,binding,imagesource,imagebrush
If you are trying to localize your application, you should consider looking into existing libraries to help you out, such as WPFLocalizationExtension. To answer your immediate question, you could define all of your images as either static properties or as resources somewhere in your application, and assign them to the...
Setting binding on usercontrol to mainwindow's ViewModel
.net,wpf,xaml,mvvm,data-binding
On your UserControl's code-behind (FilterTraceDataControl.xaml.cs), add a DependencyProperty, like this: public string Text { get { return (string)this.GetValue(TextProperty); } set { this.SetValue(TextProperty, value); } } public static readonly DependencyProperty TextProperty = DependencyProperty.Register( "Text", typeof(string), typeof(FilterTraceDataControl),new PropertyMetadata(null)); Then bind your UserControl's TextBox to it by RelativeSource or ElementName: <TextBox x:Name="PartNumbTextBox" Width="120"...
How do I provide a collection of elements to a custom attached property?
I managed to get it working using an IMultiValueConverter like this: public class BorderCollectionConverter : IMultiValueConverter { public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture) { var borderCollection = new BorderCollection(); borderCollection.AddRange(values.OfType<Border>()); return borderCollection; } public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture) { throw new...
Setting border size on button on mouse over in WPF
You're not actually utilising the BorderBrush and BorderThickness properties... you need to actually do something with them from inside your ControlTemplate. Try this: <ControlTemplate TargetType="{x:Type Button}"> <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"> <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/> </Border> </ControlTemplate> ...
Images aren't displayed in WPF ListBox
The binding in the ListBox ItemTemplate should be to the ImageViewModel's ImageBinary property, instead of Images: <DataTemplate> <Border ...> <Image Source="{Binding ImageBinary}" .../> </Border> </DataTemplate> ...
Fastest way to read very large text file in C#
If you can do this line by line then the answer is simple read a line process the line write the line If you want it to go a bit faster then put those in three BlockingCollections with a specified upper bound of like 10 so a slower step is...
Datagrid inside a Custom control is not updating
One minor mistake made by you in CustonDatagrid.xaml <DataGrid ItemsSource="{Binding ElementName=CustonDataGrid, Path=Colection}" DockPanel.Dock="Top"></DataGrid> There is no element called CustonDataGrid because of which the elements were never reflected. Changed it to <DataGrid ItemsSource="{Binding Path=Colection}"></DataGrid> I also made minor change in your MainWindow.cs public partial class MainWindow : Window { public MainWindow()...
Style vs inline property setting in silverlight with a custom control
That is not the correct way to register a dependency property. public bool UseCustomTooltips { get { return (bool)GetValue(UseCustomTooltipsProperty); } set { SetValue(UseCustomTooltipsProperty, value); } } public static readonly DependencyProperty UseCustomTooltipsProperty = DependencyProperty.Register("UseCustomTooltips", typeof(bool), typeof(MyControl), new PropertyMetadata(false, new PropertyChangedCallback(MyCallbackMethod))); Use the propdp snippet, it really is a beautiful thing....
WPF custom button
I'm going to attempt to answer your questions directly, however there is much that can be discussed here. What this template doing? All controls have some kind of default template, a pre-defined look and feel of what the control looks like. The Template is overriding the default look and feel...
How to print something in WPF without using controls? [closed]
You can utilize the utilize the PrintDocument class, which is not WPF specific. This class allows you to send output to a printer. The PrintPage event should be handled, where you utilize the PrintPageEventArgs to obtain a Graphics context; which is used to draw the exam to the printer output....
Textbox doesn't keep selection on binded list update
You could prevent this with some handling of the SelectionChanged and TextChanged events. <TextBox Text="{Binding Messages, Converter={StaticResource ListToStringConverter}}" HorizontalAlignment="Center" SelectionChanged="TextBox_SelectionChanged" TextChanged="TextBox_TextChanged" /> Then, in the handlers: private int selectionStart; private int selectionLength; private void TextBox_SelectionChanged(object sender, RoutedEventArgs e) { var textBox = sender as TextBox; selectionStart = textBox.SelectionStart; selectionLength =...
Get data from web pages and save locally
As @goobering already mentioned, this is a very broad set of questions, I will attempt to guide you in the right direction here. How can I parse data from pages? I would recommend starting with RSS. Practically all news websites have some kind of RSS feed that you can tap...
Add image to the radio button
This adds a picture to the background of your radio button. myRadioButton.Content = new Image() { Source = (new ImageSourceConverter()).ConvertFrom( "Images/pic.png") as ImageSource }; ...
WPF MVVM custom Sorting issue
Since you're marking the event as Handled (e.Handled = true), you're effectively preventing the DataGrid from sorting and the SortDirection is never changing. You'll have to manage the sort direction yourself. But it should be as easy as this: private ListSortDirection lastSortDirection; private string lastSortMemberPath; public async void Sorting(DataGridSortingEventArgs e)...
Animation Methods, Simplification and Repairing
Your issue is nothing to do with Animation.The problem is you are comparing sender.Type while you should compare sender itself i.e. use if (sender is TabItem) instead of if (obj is TabItem). Moreover, There is no need to compare sender with TabItem, Lable, Window and etc one by one, they...
Why BindingFlags are called so?
Because the class that translates the metadata to a actual method is called Binder and BindingFlags are flags that are passed on to the binder to connect to the method.
Images not appearing on WPF form when loading asynchronously
c#,wpf,multithreading,listbox,backgroundworker
@Clemens answer from his comment on the original question provided the solution. Ensuring that the file stream was being closed responsibly and changing the BitmapCacheOption to OnLoad now shows each image in the asynchronous load. The final code for the asynchronous load looks like: private void LoadAsync(object sender, DoWorkEventArgs e)...
Microsoft Band and WPF
.net,wpf,dll,microsoft-band,.net-core
The current Band SDK does not support Windows desktop (i.e. Win32) applications. It supports only Windows Store and Windows Phone (i.e. WinRT) applications. Portable libraries can be confusing as the terms '.NETCore' and 'netcore451' refer to the Windows Store version of the .NET framework....
WPF Listbox Collection custom sort
wpf,sorting,listbox,compare,collectionview
You just have to check if it starts with "price". Note that I don't think that ToString() is appropriate; you should rather implement IComparer<T> and strongly type your objects in your listbox. public int Compare(object x, object y) { // test for equality if (x.ToString() == y.ToString()) { return 0;...