viewmodel

问题 I am developing news app I am new to MVVM and I have implemented Kotlin coroutines and Koin with ViewModel hosted RecyclerView in fragment class but data not showing only progress bar loading below my screenshot I have posted my code to gist my code on gist below my code where I have implemented recyclerview and viewmodel logic class TopHeadlinesFragment : Fragment() { private val viewModel: MainViewModel by viewModel() private lateinit var topHeadlinesAdapter: TopHeadlinesAdapter //3

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . How to serialize the ViewModel ($scope) in AngularJS? I'm planning to store the serialized value to a ASP.NET server-side div to persists across postbacks. 回答1: $scope is an object created by AngularJS to interact with the markup. It can contain methods that can be referenced from html. You can create a simple

问题 I know this question has been asked and answered a dozen of times but none of the solutions help me. I have a following ViewModel which is consisted of ProductDetail data model and a list of Product_ProductCategoryAttribute data model. public class ProductDetailViewModel { public ProductDetail ProductDetail { get; set; } public List<Product_ProductCategoryAttribute> Product_ProductCategoryAttribute { get; set; } } On an action postback I receive an empty ViewModel. [HttpPost]

问题 I have a viewModel that contains two classes... public class vwbooking { public booking bookings { get; set; } public IEnumerable<trace> traces { get; set; } } Booking and trace are entities in an edmx. I want to update the data in these two class with one call to save. This is what I've tried, along with several other unsuccessful "shot-in-the-dark" variants... public ActionResult Edit(vwbooking vwbooking) { if (ModelState.IsValid) { DbEntityEntry<vwbooking> entry = db.Entry(vwbooking);

问题 In a razor view, how can I loop through different IEnumerables in a ViewModel and display their variables as columns in the same row? I Return an instance of a viewmodel which is populated with IEnumerables of different models to a mvc view like so: Viewmodel: namespace example.ViewModels { public class ClaimModel { public IEnumerable<Claim> Claims { get; set; } public IEnumerable<Member> Members { get; set; } public IEnumerable<ID> IDs { get; set; } } } My controller which return the view

问题 Is there any event or way to know the trigger when the ViewModel is updating/updated by the View? INotifyPropertyChanged and PropertyChanged is used when the ViewModel updated the View. But is there any reverse? 回答1: Changes from the view to the view model will trigger PropertyChanged as well, as they set properties. 回答2: If your are binding the controls in your view to the view model, many of the pieces will update the view model as long as you make sure the binding is Mode=TwoWay . http:/

问题 Can someone help me to solve this problem. I want to pass ienumerable or just simple list of my custom viewmodel to controller. Theres my code: @model IEnumerable<WebWareApp.ViewModels.OstukorvVM> @{ ViewBag.Title = "Ostukorv"; } <h2>Hetkel ostukorvis olevad tooted:</h2> @using (Html.BeginForm("Create", "ToodeTellimuses")) { @Html.AntiForgeryToken() <table> <tr> <th>Tootenimi</th> <th>Tootegrupp</th> <th>Tootja</th> <th>Mõõdud</th> <th>Varvus</th> <th>Hind</th> <th>Vali Kogus</th> <th></th> <

问题 This question is part B of my other question here: Inefficient MVC ViewModel Making Multiple Calls to the Database? I knew multiple calls to the db was a bad idea. But, I guess my real question is if I use my last chunk of code or speti43's example let's say like this in my model constructor to eliminate multiple db calls: Public Class OrdersSummary{ ... Public ???? GetOrders(){ var ordersInMemory = orders.ToList(); decimal? GrossProfitTotal = ordersInMemory.Sum(s => s.Profit); decimal?

问题 Please refer to How can I tell my DataTemplate to bind to a property in the PARENT ViewModel? I have similar problem... But this solution didn't work for me. I have a MainViewModel which has an observable collection of another view model say View1/ViewModel1. This view has a tree control and I need context menu for the tree. My main view has a menu. Those main menu and context menu are connected. So how can I bind the context menu commands to the main viewmodel's properties? 回答1: Basically,

问题 I am using the Navigation Component of Android Jetpack (2.2.0-alpha01). I wish to use a child NavHostFragment nested inside my main NavHostFragment, equipped with its own child nav graph. Please view the following image for context: The child nav host is defined like this inside the fragment that is at the front of the MainNavHost's stack: <fragment android:id="@+id/childNavHostFragment" android:name="androidx.navigation.fragment.NavHostFragment" android:layout_width="match_parent" android