Question

I am having an issue with the propertyGrid.

I have a class called DummySettings that is mapped to the propertyGrid
I have a property “Name”

When typing something in the propertygrid EG the Name property I would like to raise an event that “TextChanged”

Despite implementing the INotifyPropertyChanged event and raising it and despite hooking all sorts of events I can think of on the propertyGrid
none of this events fires when A text changes.

Am I missing the obvious?

EDITED

Psuedo Code

   public class DummySettings : INotifyPropertyChanged
            {
                private string name;


                [DisplayName("Name")]
                public string Name
                {
                    get { return name; }
                    set
                    {
                        if (name != value)
                        {
                          name = value;
                         OnPropertyChanged("Name");
                        }
                    }
                }

                public event PropertyChangedEventHandler PropertyChanged;

                protected virtual void OnPropertyChanged(string propertyName)
                {
                    PropertyChangedEventHandler handler = PropertyChanged;
                    if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
                }
            }



        //UserControl
    public partial class DummyControl : UserControl
    {
     private DummySettings settings;

     ///Constructor
    public DummyControl()
    {
        InitializeComponent();

        settings = new DummySettings();
        propertyGrid1.SelectedObject = settings;
        settings.PropertyChanged += OnDummyPropertyChanged;


     //All the events I have hooked up but not firing when text is changed 
    private void OnDummyPropertyChanged(object sender, PropertyChangedEventArgs e)
    {
          btnToEnable.Enabled = HasName();
    }        
     private void propertyGrid1_Leave(object sender, EventArgs e)
    {
               btnToEnable.Enabled = HasName();
    }

    private void propertyGrid1_Validating(object sender, CancelEventArgs e)
    {
        btnToEnable.Enabled = HasName();
    }

    private void propertyGrid1_SelectedObjectsChanged(object sender, EventArgs e)
    {
          btnToEnable.Enabled = HasName();
    }


    private void propertyGrid1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
    {
         btnToEnable.Enabled = HasName();
    }

      private bool HasName()
    {
        return settings.Name.IsNotNullOrEmpty();
    }

Answer 1

You can use PropertyValueChanged event to get notified of selected object property changed in PropertyGrid. So, when you are changed Name property value from “Foo” to “Bar”, this event will be raised:

void propertyGrid_PropertyValueChanged(object s, PropertyValueChangedEventArgs e)
{
    // previous value is e.OldValue, "Foo"
    // property name is e.ChangedItem.Label, "Name"
    // new value is e.ChangedItem.Value, "Bar"
}