public override object Load(XamlReader xamlReader, IServiceProvider serviceProvider)
{
IXamlObjectWriterFactory settings = serviceProvider.GetService(typeof(IXamlObjectWriterFactory)) as IXamlObjectWriterFactory;
System.Windows.Markup.IProvideValueTarget provideValueService = serviceProvider.GetService(typeof(System.Windows.Markup.IProvideValueTarget)) as System.Windows.Markup.IProvideValueTarget;
Type propertyType = null;
// IProvideValueTarget.TargetProperty can return DP, Attached Property or MemberInfo for clr property
// In this case it should always be a regular clr property here.
PropertyInfo propertyInfo = provideValueService.TargetProperty as PropertyInfo;
if (propertyInfo != null)
{
propertyType = propertyInfo.PropertyType;
}
else
{
return(null);
}
object instance = Activator.CreateInstance(
typeof(FuncFactory <>).MakeGenericType(propertyType.GetGenericArguments()),
settings,
xamlReader);
return(Delegate.CreateDelegate(propertyType, instance, instance.GetType().GetMethod("Evaluate")));
}
// Used to implement IProvideValueTarget Service provider.
public static object GetTargetProperty(ObjectWriterContext xamlContext)
{
// If the XamlMember implements IProvideValueTarget, ask it for the TargetProperty first
Debug.Assert(xamlContext.ParentProperty != null);
System.Windows.Markup.IProvideValueTarget ipvt = xamlContext.ParentProperty as System.Windows.Markup.IProvideValueTarget;
if (ipvt != null)
{
return(ipvt.TargetProperty);
}
XamlMember parentProperty = xamlContext.ParentProperty;
//
// We should never have a null ParentProperty here but
// protect against null refs since we are going to dereference it
if (parentProperty == null)
{
return(null);
}
if (parentProperty.IsAttachable)
{
//
// IPVT returns the static Set method for attached properties in 3.0
return(parentProperty.Setter);
}
else
{
//
// This branch cover regular property (will return non null)
// and items in a collection/diction (will return null - IPVT returns null in 3.0 for collections/dictionaries).
return(parentProperty.UnderlyingMember);
}
}
