How to have bindable properties of a UserControl which work with OnPropertyChanged

Question

I have a simple usercontrol (WinForms) with some public properties. When I use this control, I want to databind to those properties with the DataSourceUpdateMode set to

Answer 1

Implementing the INotifyPropertyChanged interface is very simple. Here is a sample that shows an object with a single public field...

public class Demo : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    private void NotifyPropertyChanged(String info)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(info));
    }

    private string _demoField;

    public string DemoField
    {
        get {return demoField; }

        set
        {
            if (value != demoField)
            {
                demoField = value;
                NotifyPropertyChanged("DemoField");
            }
        }
    }
}

Then you would create a Binding instance to bind a control property to a property (DemoField) on your source instance (instance of Demo).