XAML Binding to complex value objects
- by Gus
I have a complex value object class that has 1) a number or read-only properties; 2) a private constructor; and 3) a number of static singleton instance properties [so the properties of a ComplexValueObject never change and an individual value is instantiated once in the application's lifecycle].
public class ComplexValueClass
{
/* A number of read only properties */
private readonly string _propertyOne;
public string PropertyOne
{
get
{
return _propertyOne;
}
}
private readonly string _propertyTwo;
public string PropertyTwo
{
get
{
return _propertyTwo;
}
}
/* a private constructor */
private ComplexValueClass(string propertyOne, string propertyTwo)
{
_propertyOne = propertyOne;
_propertyTwo = PropertyTwo;
}
/* a number of singleton instances */
private static ComplexValueClass _complexValueObjectOne;
public static ComplexValueClass ComplexValueObjectOne
{
get
{
if (_complexValueObjectOne == null)
{
_complexValueObjectOne = new ComplexValueClass("string one", "string two");
}
return _complexValueObjectOne;
}
}
private static ComplexValueClass _complexValueObjectTwo;
public static ComplexValueClass ComplexValueObjectTwo
{
get
{
if (_complexValueObjectTwo == null)
{
_complexValueObjectTwo = new ComplexValueClass("string three", "string four");
}
return _complexValueObjectTwo;
}
}
}
I have a data context class that looks something like this:
public class DataContextClass : INotifyPropertyChanged
{
private ComplexValueClass _complexValueClass;
public ComplexValueClass ComplexValueObject
{
get
{
return _complexValueClass;
}
set
{
_complexValueClass = value;
PropertyChanged(this, new PropertyChangedEventArgs("ComplexValueObject"));
}
}
}
I would like to write a XAML binding statement to a property on my complex value object that updates the UI whenever the entire complex value object changes. What is the best and/or most concise way of doing this? I have something like:
<Object Value="{Binding ComplexValueObject.PropertyOne}" />
but the UI does not update when ComplexValueObject as a whole changes.
