The Joy Of Programming

Here is a way for XAM Designers to compare two instances inside XAML using an IValueConverter. Imagine that you have a ComboBox and few other controls. ComboBox is bounded to a Collection of objects (In my attached code I am binding it to an Enum). In such a situation the UI designer wants to enable/disable some other controls based on the selected value of the ComboBox. He can use the following IValueConnverter class as a Generic comparer which will return a true or false. public class GenericComparer : IValueConverter { object IValueConverter .Convert( object value, Type targetType, object parameter, CultureInfo culture) { if (value == null ) return false ; // If the object has implemented IComparable if (value is IComparable ) { if ((( IComparable )value).CompareTo(parameter) == 0) return true ; } else if (value.Equals(parameter)) return true ; return false ; } Now instantiate a comparer in the resource as follows. ……………… If we wanted to control the IsEnabled property of a...