Choice is not only between user control and custom control, but among user control, custom control, customizing control template, customizing data template, header template (for collection based controls), attached properties. Refer to Control Authoring overview I go by following order of consideration Attached Properties : If functionality can be achieved, I use attached properties. Example, … Read more
You can use the DisplayFormat attribute on the property of your model class: [DisplayFormat(ConvertEmptyStringToNull = false)]
I use an IBuilder interface and implement it using the ValueInjecter public interface IBuilder<TEntity, TViewModel> { TEntity BuildEntity(TViewModel viewModel); TViewModel BuildViewModel(TEntity entity); TViewModel RebuildViewModel(TViewModel viewModel); } … (implementation) RebuildViewModel just calls BuildViewModel(BuilEntity(viewModel)) [HttpPost] public ActionResult Update(ViewModel model) { if(!ModelState.IsValid) { return View(builder.RebuildViewModel(model); } service.SaveOrUpdate(builder.BuildEntity(model)); return RedirectToAction(“Index”); } btw I don’t write ViewModel I write Input … Read more
Create a parent view model that contains both models. public class MainPageModel{ public Model1 Model1{get; set;} public Model2 Model2{get; set;} } This way you can add additional models at a later date with very minimum effort.
Simply replace: This: boardViewModel = ViewModelProviders.of(this).get(BoardViewModel::class.java) With this: boardViewModel = ViewModelProvider(this).get(BoardViewModel::class.java)
Essentially Model and View Model are both simple classes with attributes. The main objective of these classes are to describe (to “Model”) an object for their respective audiences that are respectively the controller and the view. So you are completely right when you say To my understanding, it’s a kind of Model that has a … Read more
We can not create ViewModel on our own. We need ViewModelProviders utility provided by Android to create ViewModels. But ViewModelProviders can only instantiate ViewModels with no arg constructor. So if I have a ViewModel with multiple arguments, then I need to use a Factory that I can pass to ViewModelProviders to use when an instance … Read more
I am assuming that you are using android architecture components. Actually it doesn’t matter wherever you are calling service, asynctask or handler to update the data. You can insert the data from the service or from the asynctask using postValue(..) method. Your class would look like this: private void loadUsers() { // do async operation … Read more
The definition of these terms is quite ambiguous. You will find different definitions at different places. Entity: An entity represents a single instance of your domain object saved into the database as a record. It has some attributes that we represent as columns in our tables. Model: A model typically represents a real world object … Read more
The canonical definition of a DTO is the data shape of an object without any behavior. ViewModels are the model of the view. ViewModels typically are full or partial data from one or more objects (or DTOs) plus any additional members specific to the view’s behavior (methods that can be executed by the view, properties … Read more