Question

Is it possible to using XAML data binding to a model with Auto-Implemented properties?

class ClassA
{
  // pseudo code.
  int Width { get; set{ NotifyPropertyChange("Width");} }
}


//XAML
<textBox width="{Binding Path=Width,Mode=OneWay}"/>

Answer 1

Auto-properties don’t have a half auto mode. It needs to either be an auto-property with nothing extra:

int Width { get; set; }

or a fully expanded property with a backing store that can have additional code added to it, like change notification:

int _width;
int Width
{
  get { return _width; }
  set
  {
    _width = value;
    NotifyPropertyChange("Width");
  }
}

If you use auto-properties you can still bind to them but you’re giving up change notification, so any changes you make to the property from code won’t show up in the UI. In general any object being used for data binding should include change notification and so should not use auto-properties.