propertychanged Questions

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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 eve...
Discoloration asked 20/2, 2019 at 14:56

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I've been battling this issue for a while now and seem not to be able to come up with a concrete workaround - I have a TextBox which is bound to a decimal, and the binding has UpdateSourceTrigger s...
Schaffner asked 27/4, 2012 at 16:10

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I was wondering if it's possible to raise a PropertyChanged event when the user pauses while typing text into a TextBox? Or more specifically, I want to run a method X seconds after the user stops ...
Tram asked 15/7, 2011 at 17:57

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I have a class as property with a property observer. If I change something in that class, is there a way to trigger didSet as shown in the example: class Foo { var items = [1,2,3,4,5] var number...
Forras asked 5/4, 2015 at 3:14

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This is a really simple question, but I was wondering if someone could explain what the 4th line is actually doing? so the first line gives an event to the handler. I don't really know in what circ...
Brady asked 19/7, 2013 at 1:10

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I want to subclass ObservableCollection to add a property to it. Unfortunately, the PropertyChanged event is protected. Basically, I want to subclass it to have a SelectedItem that I can bind to fo...
Marindamarinduque asked 16/6, 2009 at 18:58

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hi; there are Source and target textbox txttarget has a binding to txtsource. when writing something in txtsource, txttarget is changed.Everything is good. But writing on txttarget, i dont see any ...
Storehouse asked 28/11, 2012 at 8:48

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I am working in C# and I have an object which I can only access using Reflection (for some personal reasons). So, when I need to set some value to one of its properties I do as below: System.Refle...
Napiform asked 26/6, 2012 at 15:12

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I have the following textbox that have a propertychanged in the viewmodel. When I insert the Binding.ValidationRules and I insert some wrong value, it doesn't trigger the propertychanged event and ...
Cylindroid asked 11/6, 2012 at 17:27

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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 FrameworkPropertyM...
Minervamines asked 26/4, 2011 at 20:1

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I want to listen to the changes of the value of the SpinnerNumberModel for a JSpinner. I create a PropertyChangeSupport and put the model into it. I need the propertyChangeListener, because it sho...

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I have 2 properties to a class (WPF control): HorizontalOffset and VerticalOffset (both public Double's). I would like to call a method whenever these properties change. How can I do this? I know o...
Eggplant asked 29/2, 2012 at 15:31

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I have a simple class with a string property and a List property and I have the INofityPropertyChanged event implemented, but when I do an .Add to the string List this event is not hit so my Conver...
Barncard asked 12/12, 2011 at 4:54

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I have a jFormattedTextField and I set setCommitsOnValidEdit to true then I added an event listener to "property change" on "value" property. At first focus of that jFormattedTextField it doesn't ...

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I have a TextBox Binded to a dependancy property, I have implemented a PropertyChangedCallBack function, when the text changes I need to call textbox.ScrollToEnd() but I cant since the PropertChang...
Peonage asked 31/3, 2011 at 10:36

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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 ...

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I am creating a WPF CustomControl that has a dependency property with PropertyChangedCallback. In that Callback method I try to set values on some of the control's parts that I retrieve from OnAppl...
Mcarthur asked 19/8, 2009 at 10:2

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The article http://msdn.microsoft.com/en-us/magazine/dd419663.aspx has the following code sample: public event PropertyChangedEventHandler PropertyChanged; protected virtual void OnPropertyChange...
Vivienviviene asked 20/12, 2010 at 12:41

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I have a text box whose Text property has a TwoWay MultiBinding with UpdateSourceTrigger set to PropertyChanged. The first Binding is to a dependency property (Value) which has a PropertyChangedCal...

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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 t...
Inefficacy asked 19/4, 2010 at 20:27
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