public override void ShowDialog(PropertyItemValue propertyValue, IInputElement commandSource)
{
PropertyGrid propGrid = commandSource as PropertyGrid;
string lastPath = propertyValue.StringValue;
if (propGrid == null)
{
return;
}
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "All files (*.*)|*.*";
openFileDialog.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
openFileDialog.ShowDialog();
propertyValue.StringValue = openFileDialog.FileName != String.Empty ? openFileDialog.FileName : lastPath; // change this string and compile, the ui does not see this change
propGrid.DoReload();
propGrid.RaiseEvent(new PropertyValueChangedEventArgs(PropertyGrid.PropertyValueChangedEvent, propertyValue.ParentProperty, ""));
}