Category "mvvm"

MVVM: ViewModel logic needs info from database, but how to wait for the data?

I am new to MVVM and am trying to figure out how to organize my app. I made a simplified login app to help figure things out. I separated the app into layers: A

I am using a scroll view that hides my toolbar while scrolling, I don't want my toolbar to hide while scrolling

I am making a register screen, that has a toolbar on top of it. When I scroll down the toolbar hides(goes up). I don't want my toolbar to scroll when I am scrol

SwiftUI - How to pass EnvironmentObject into View Model?

I'm looking to create an EnvironmentObject that can be accessed by the View Model (not just the view). The Environment object tracks the application session da

How ViewModel is not get destroyed when activity is rotated

I am curious to know how a ViewModel survives when Activity gets rotated because of that it destroyed and recreated again. Logically If we see then ViewModel ge

After sending data from MainActivity to Fragment, the variables are setup to 0.0

I'm trying to pass from MainActivity to Fragments (by using ViewPager, and TabLayout, if it will help you anyhow) user's latitude, and longitude. The thing is,

Prism 8 , IDialogWindow keynotfound Exception in WPF C#

I used Prism 8.1 and Unity in my WPF Project. I want to implement IDialogWindow but get exception error... Prism.Ioc.ContainerResolutionException: 'An unexpect

How to add test data to PreviewProvider

I am new to iOS/Swift and to the MVVM architecture and was wondering how to send in test data to the SwiftUI Preview. (Actual data is received from the ViewMode

Blazor Server App MVVM-Pattern: Get notifyed in parent from child component change of App-State via a serviceclass in Startup.cs

I work on a Blazor-Server-App and try to follow MVVM pattern. My problem is, that I don't understand why a parentpage is not 'auto refreshed' after a property i

Best way to determine if a user can view a window

How can I determine if a user can see a window (fully or partially) at the screen using WPF/C#? I tried to define this using WindowState, but the window may be

XAML/MVVM help for implementing screen grid

As a complete beginner to XAML/MVVM I would like to request some help with implementing a 24x14 letter screen. The XAML implementation is quite easy I think wit

Filtering a recyclerview list using map or switchmap

I've been trying to figure this out for 2 days now - I just can't seem to get it to work! I'm using MVVM with a Repository pattern. Could someone tell me what I

Can I use MVVM without data binding?

I am trying to use MVVM. Upon reading some blogs on MVVM, I found them using data binding techniques like Rx, KVO, Boxing etc. Following are my classes for vali

Add/Delete Item in real-time from ListView (C# MVVM WPF)

I have a ListView with an ObservableCollection. The class User has a List with Groups. I have another ListView which shows the Groups of the selected User. Now

CanExecute works only partial

I am working on a WPF .NET 5 application that needs to handle a longer task using a button command. Until the task is done, the button should be disabled. I am

SwiftUI MVVM Coordinator/Router/NavigationLink

I am having problems to translate UIKit architecture patterns to SwiftUI. My current pattern is mostly MVVM with Coordinators/Routers. The MVVM part seems quite

How can I use an API to implement a search functionality on Android?

I am attempting to create a search functionality in an android application and have been doing research on how I can accomplish this while taking in data from a

What Tools are Used to Draw Software Documentation [closed]

I would like to draw diagrams like this one: (taken from here.) What tools are available to create such figures?

Inputted Items sometimes appear empty in Data grid

I have ItemsControl and a DataGrid in a WPF UserControl. this is how it looks like when the "Add to card" button is pressed a ViewModel instance is added to Obs

Newbie SwiftUI Nested array

Please help me display my model data from api I have a nested json data response and Have a swiftui model as below ****************************MyData model stru

Kotling :: Android :: java.lang.ClassCastException: java.lang.Class cannot be cast to androidx.lifecycle.ViewModel

I am getting an exception in the first line of the code below viewModel.homeLiveData.observe(this, Observer { list -> list?.let { mLis