viewmodel

I used to receive empty string when there was no value: [HttpPost] public ActionResult Add(string text) { // text is "" when there's no value provided by user } But now I'm passing a model [HttpPost] public ActionResult Add(SomeModel Model) { // model.Text is null when there's no value provided by user } So I have to use the ?? "" operator. Why is this happening? Michael Jubb You can use the DisplayFormat attribute on the property of your model class: [DisplayFormat(ConvertEmptyStringToNull = false)] The default model binding will create a new SomeModel for you. The default value for the

As a fairly experienced ASP.Net developer just recently starting using MVC, I find myself struggling a bit to change my mindset from a traditional "server control and event handler" way of doing things, into the more dynamic MVC way of things. I think I am slowly getting there, but sometimes the MVC "magic" throws me off. My current scenario is to create a web page that allows the user to browse a local file, upload it to the server and repeat this until he has a list of files to work with. When he is happy with the file list (which will be displayed in a grid on the page), he will click a

I'm using NHibernate to persist my domain objects. To keep things simple I'm using an ASP.NET MVC project as both my presentation layer, and my service layer. I want to return my domain objects in XML from my controller classes. After reading some posts here on Stack Overflow I gather DTOs are the way to go. However, I've also come across posts talking about the ViewModel. My question: Are Data Transfer Objects and ViewModels the same thing? Or is a ViewModel a kind of sub pattern of a DTO? The canonical definition of a DTO is the data shape of an object without any behavior. ViewModels are

Every article found in the Internet on using ViewModels and utilizing Automapper gives the guidelines of the "Controller -> View" direction mapping. You take a domain model along with all Select Lists into one specialized ViewModel and pass it to the view. That's clear and fine. The view has a form, and eventually we are in the POST action. Here all the Model Binders come to the scene along with [obviously] another View Model which is [obviously] related to the original ViewModel at least in the part of naming conventions for the sake of binding and validation. How do you map it to your Domain

I have used EF Designer from database to build my models from a database created for my project. For a single controller, I need to reference multiple models. An example of this is that there is a Users table which contains the user department and office. I need to reference two separate tables DepartmentPermissions and OfficePermissions to determine what data the user is able to see. Here are examples of the auto generated models: //------------------------------------------------------------------------------ // <auto-generated> // This code was generated from a template. // // Manual

I am trying to find out in the code below, why is it that Room's LiveData observable does not give me new shifts once I populate the database with new data. This is put on my activity's onCreate method: shiftsViewModel = ViewModelProviders.of(this).get(ShiftsViewModel.class); shiftsViewModel .getShifts() .observe(this, this::populateAdapter); This is the populateAdapter method: private void populateAdapter(@NonNull final List<Shift> shifts){ recyclerView.setAdapter(new SimpleItemRecyclerViewAdapter(shifts)); } I also have the following code that populates the database (I use RxJava to do the

I have a class called "PropertyFeature" which simply contains PropertyFeatureID and Description. It's a proper model created through LINQ to SQL mapped to an SQL Server database table. An example instance/row would be: PropertyFeatureID: 2 Description: "Swimming Pool" The number of rows (PropertyFeatures) can of course grow and shrink, and so I want to dynamically render a list of checkboxes so that the user can select any of them. I can dynamically render the Checkboxes easily enough, with something like: <%foreach (var Feature in (ViewData["Features"] as IEnumerable<MySolution.Models