protected virtual void ClearTargetBinding()
{
lock (_targetLocker)
{
if (_targetBinding != null)
{
if (_targetBindingOnValueChanged != null)
{
_targetBinding.ValueChanged -= _targetBindingOnValueChanged;
_targetBindingOnValueChanged = null;
}
_targetBinding.Dispose();
_targetBinding = null;
}
}
}
private void CreateTargetBinding(object target)
{
_targetBinding = TargetBindingFactory.CreateBinding(target, _bindingDescription.TargetName);
if (_targetBinding == null)
{
Log.Warning("Failed to create target binding for {0}", _bindingDescription.ToString());
_targetBinding = new NullTargetBinding();
}
if (NeedToObserveTargetChanges)
{
_targetBinding.SubscribeToEvents();
_targetBindingOnValueChanged = (sender, args) => UpdateSourceFromTarget(args.Value);
_targetBinding.ValueChanged += _targetBindingOnValueChanged;
}
_defaultTargetValue = _targetBinding.TargetType.CreateDefault();
}
protected virtual bool TryCreateReflectionBasedBinding(object target, string targetName,
out ITargetBinding binding)
{
if (string.IsNullOrEmpty(targetName))
{
Log.Error("Empty binding target passed to MvxTargetBindingFactoryRegistry");
binding = null;
return(false);
}
if (target == null)
{
// null passed in so return false - fixes #584
binding = null;
return(false);
}
var targetPropertyInfo = target.GetType().GetProperty(targetName);
if (targetPropertyInfo != null &&
targetPropertyInfo.CanWrite)
{
binding = new WithEventPropertyInfoTargetBinding(target, targetPropertyInfo);
return(true);
}
var targetEventInfo = target.GetType().GetEvent(targetName);
if (targetEventInfo != null)
{
// we only handle EventHandler's here
// other event types will need to be handled by custom bindings
if (targetEventInfo.EventHandlerType == typeof(EventHandler))
{
binding = new EventHandlerEventInfoTargetBinding(target, targetEventInfo);
return(true);
}
}
binding = null;
return(false);
}
protected virtual bool TryCreateSpecificFactoryBinding(object target, string targetName,
out ITargetBinding binding)
{
if (target == null)
{
// null passed in so return false - fixes #584
binding = null;
return(false);
}
var factory = FindSpecificFactory(target.GetType(), targetName);
if (factory != null)
{
binding = factory.CreateBinding(target, targetName);
return(true);
}
binding = null;
return(false);
}
