Question

I wish to run an event which will occur on some counter change, e.g. every time

int counter;

changes its value, the event is raised.
I have something like from MSDN:

public class CounterChange:INotifyPropertyChanged
{
    private int counter;
    // Declare the event
    public event PropertyChangedEventHandler PropertyChanged;

    public CounterChange()
    {
    }

    public CounterChange(int value)
    {
        this.counter = value;
    }

    public int Counter
    {
        get { return counter; }
        set
        {
            counter = value;
            // Call OnPropertyChanged whenever the property is updated
            OnPropertyChanged("Counter");
        }
    }

    // Create the OnPropertyChanged method to raise the event
    protected void OnPropertyChanged(string name)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if(handler != null)
        {
            handler(this, new PropertyChangedEventArgs(name));
        }
    }
}

But have no idea what next. How to raise incrementation from program, and connect method to these event.

Answer 1

You’d probably have to do something like this in your main program:

var counter = new CounterChange(0);
counter.PropertyChanged += SomeMethodYouWantToAssociate;

So, when the value of counter.Counter changes, the subscribers of the event will be notified and executed (in my example, SomeMethodYouWantToAssociate will be).

private static void SomeMethodYouWantToAssociate(object sender, PropertyChangedEventArgs e)
{
    // Some Magic inside here
}