private void OneTimeTargetHandler(IObserver sender, ValueChangedEventArgs args)
{
IDataBinding binding = Binding;
if (binding != null && binding.TargetAccessor.IsAllMembersAvailable() && binding.SourceAccessor.IsAllMembersAvailable())
{
binding.TargetAccessor.Source.ValueChanged -= OneTimeTargetHandler;
binding.UpdateTarget();
}
}
private void OneTimeHandler(IBindingSource sender, ValueChangedEventArgs args)
{
IDataBinding binding = Binding;
if (binding == null || !IsSourceAvailable() || !binding.UpdateTarget())
{
return;
}
UnsubscribeSources(OneTimeHandler);
if (_disposeBinding)
{
binding.Dispose();
}
}
private void OneTimeHandler(IObserver sender, ValueChangedEventArgs args)
{
IDataBinding binding = Binding;
if (binding == null || !binding.TargetAccessor.IsAllMembersAvailable() || !binding.SourceAccessor.IsAllMembersAvailable(true))
{
return;
}
EventHandler <IObserver, ValueChangedEventArgs> handler = OneTimeHandler;
UnsubscribeSources(handler);
binding.TargetAccessor.Source.ValueChanged -= handler;
binding.UpdateTarget();
if (_disposeBinding)
{
binding.Dispose();
}
}
protected override void UpdateErrors(IList <object> errors, IDataContext context)
{
Errors = errors ?? Empty.Array <object>();
IDataBinding dataBinding = Binding;
if (_updating || dataBinding == null || !IsAttached)
{
return;
}
try
{
_updating = true;
dataBinding.UpdateTarget();
}
finally
{
_updating = false;
}
}