propertychanged

How do I raise PropertyChanged for SomeProperty in class B ? This example does not compile since PropertyChanged is not accessible this way... public class A : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; } public class B : A { private object _someProperty; public object SomeProperty { get => _someProperty; set { _someProperty = value; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(SomeProperty))) } } } Solution 1: You can use this RaisePropertyChangedExtension : public static class RaisePropertyChangedExtension { public static void

I have a custom object that I am trying to bind to a control. On that custom object I have implemented the INotifyPropertyChanged interface. I have successfully bound to my object and a property on that object. What I can't figure out is how to go from there. I've been working on this for 2 days now and I still cannot get it working. My assumption was that when I would change the property bound to the control that the value set in that property would then show up in the control. However, no matter how much I change the property, the UI is never updated beyond it's initial value. I have

I've tried to code a class to avoid a method like "RaisePropertyChanged". I know that I can inherit from a class that has that implementation but in some cases I can't. I've tried with a Extension Method but Visual Studio complain. public static class Extension { public static void RaisePropertyChanged(this INotifyPropertyChanged predicate, string propertyName) { if (predicate.PropertyChanged != null) { predicate.PropertyChanged(propertyName, new PropertyChangedEventArgs(propertyName)); } } } It said: "The event ' System.ComponentModel.INotifyPropertyChanged.PropertyChanged' can only appear on

I have a user control, which exposes a DependencyProperty called VisibileItems Every time that property gets updated, i need to trigger another event. To achieve that, i added a FrameworkPropertyMetadata with PropertyChangedCallback event. For some reason, this event gets called only once, and doesn't trigger the next time VisibleItems is changed. XAML: <cc:MyFilterList VisibleItems="{Binding CurrentTables}" /> CurrentTables is a DependencyProperty on MyViewModel. CurrentTables gets changed often. I can bind another WPF control to CurrentTables, and i see the changes in the UI. Here is the way

Normally when you want a databound control to 'update,' you use the "PropertyChanged" event to signal to the interface that the data has changed behind the scenes. For instance, you could have a textblock that is bound to the datacontext with a property "DisplayText" <TextBlock Text="{Binding Path=DisplayText}"/> From here, if the DataContext raises the PropertyChanged event with PropertyName "DisplayText," then this textblock's text should update (assuming you didn't change the Mode of the binding). However, I have a more complicated binding that uses many properties off of the datacontext to

I have a BindingProxy to Bind the Visibility-Property of DataGridColumns of a DataGrid to a Value in a Dictionary ("ColumnsVisibility"). I Also have a Context-Menu, that should make it possible to hide/show the columns of the Grid. <DataGrid Name="dgMachines" ItemsSource="{Binding HVMachineList, UpdateSourceTrigger=PropertyChanged}" AutoGenerateColumns="False" > <DataGrid.Resources> <local:BindingProxy x:Key="proxy" Data="{Binding}"/> <ContextMenu x:Key="DataGridColumnHeaderContextMenu"> <MenuItem Header="Names"> <CheckBox Content="Name" IsChecked="{Binding Data.ColumnsVisibility[ElementName],