inotifypropertychanged

I have a class that implements the INotifyPropertyChanged interface. Some of the properties of the class are of type List. For example: public List<string> Answers { get { return _answers; } set { _answers = value; onPropertyChanged("Answers") } } ... private void onPropertyChanged(string propertyName) { if(this.PropertyChanged != null) this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } If I assign a new List<string> to Answer, then the PropertyChanged event fires as expected; but if I add a string string to the Answer list using the List Add method, then PropertyChanged

I have a Winform application which uses colour to highlight certain things. I would like to allow the users to change 'their' colours. As an exercise, I thought I would create an instance of a class, with properties for the colours, and assign it to a property grid (to get a nice editor) . This seems to work fine, but I then thought I would like to let the users reset the colours (after they had fiddled and set them to 20 shades of beige) . So, I added a "reset" button to my form, which set the colour properties of my object back to the defaults. However, it seems that while it sets my object

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

Right now I have a calender that only displays one month(what ever month I pass in). I'm trying to let the user pick what month and year from a comboBox and have the calender update. I'm binding using observablecollection which I'm sort of familiar with. I have no clue how INotifyPropertyChanged works though. I've never used it before. Any help or advice is greatly appreciated. This is what I have so far: public class Schedule : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; public void Update(int propertyName) { if (propertyName != null) {

I'm trying to simplify some code by putting the ViewModel models into the code behind and binding the DataContext as "this", but it seems to work differently, in the following example: Why is it when the button is clicked, the TextBlock bound to "Message" does not change, even though OnPropertyChanged("Message") is called? XAML: <Window x:Class="TestSimple223.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"> <StackPanel HorizontalAlignment="Left"> <Button Content="Button"

I'm getting confused; I thought I understood INotifyPropertyChanged. I have a small WPF app with a frontend MainWindow class, a viewmodel in the middle and a model at the back. The model in my case is the Simulator class. The SimulatorViewModel is nearly transparent and just interfaces properties between MainWindow and Simulator. Simulator implements INotifyPropertyChanged and each property setter in Simulator calls the RaisePropertyChanged method: private string serialNumber; public string SerialNumber { get { return serialNumber; } set { serialNumber = value; RaisePropertyChanged(