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The Model-View-ViewModel design pattern, which separates presentation from data and logic.

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ViewModels for image transformations

In my project I have a chain of Fragments where each one gets a bitmap, manipulates it, then sends it to another fragment for more processing. My fragment chain looks like this: CaptureFragment -> ...
4
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2answers
78 views

MVVM model letting the user select a directory in a testable manner

My application needs to let the user select a folder from somewhere on their local machine. Below are the interface and model pair that I have written to let the user do so. ...
2
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0answers
27 views

Swift MVVM: Repositories - loading entities and dependency injection

I create a lexikon and a navigation for ZOO. I use MVVM architecture supported by ReactiveSwift. I have a few questions about my practises and whether I could write my repositories better and more ...
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1answer
36 views

Is attempt like this, when using Application class, breaking MVVM pattern? [closed]

In my application I am using two view models. MainViewModel if fiered when MianWindow is initialized. And UpdateViewModel is fiered when UpdateWindow is initialized. The update VM is supposed to use ...
5
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1answer
175 views

Scraping an parsing jockeys data using Task.Run

I started to have HUGE doubts regarding my code and I need some advice from more experienced programmers and architects. On the button click, the application runs a method, that is running a ...
3
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1answer
75 views

Create Products TableView with PAGINATION and LIKE product feature in RxSwift MVVM

I have tried to develop a simple product listing app in RxSwift with MVVM design pattern. I have managed to achieve it but I need someone to review my code, such as: Have I followed the proper ...
4
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1answer
82 views

Android clock in/out app

I am writing a clock in / out and payroll app for Android. I am no professional, but I was hoping I could get some feedback on whether my code is spaghetti or not. This is just one of many classes &...
3
votes
1answer
155 views

Login page using RxSwift in MVVM

I am building a simple login page which will check for username before navigating to another screen and here is how I am doing the binding now. I would like to know if I am doing it right and if I am ...
2
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0answers
280 views

MVVM Databinding, Commands, Async - MVVM.Light [closed]

I'm new to C#, WPF and MVVM and I don't want to make common mistakes right from the beginning and get used to them. I already read some similar questions on best practices for WPF/MVVM but none of ...
1
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0answers
192 views

Setting the Owner property on a modal dialog in WPF/MVVM using a Func

I'm looking to solve the problem of setting the Owner property on modal dialogs in WPF, while using IoC and MVVM patterns. I've seen (and written) all sorts of ...
1
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1answer
135 views

Addition Program using wpf through MVVM

I'm new to MVVM and WPF. Please suggest whether this is okay or I need to correct my understanding of MVVM which I confess is very limited as at the moment. I have created a simple addition ...
11
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1answer
511 views

Filter Collection by Multiple Criteria

I want to the user to filter a list of receipts by various criteria. Just the regular, an empty filter should show all items, an entry in customer should show all receipts from that customer and an ...
10
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1answer
122 views

Visual Studio exception visualizer for lengthy exception messages

I use Autofac a lot and for everything and when you make a mistake and forget to register a dependency etc. it'll tell you exaclty what's wrong. Although its ...
1
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2answers
249 views

Android MVVM application architecture

Inspired this guide: https://developer.android.com/jetpack/docs/guide I try to build some app with similar architecture. App interact with remote API via http protocol (json responses from server). ...
0
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0answers
1k views

Flutter - Implementing a simple ListView with MVVM

I've implemented a simple ListView in MVVM that displays a few PrepSteps (short form of PreparationSteps). While implementing I wasn't sure about if my approach is "...
1
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0answers
814 views

LiveData, MVVM and Repository Pattern

Is this a good approach or I've just found a nasty workaround? I'm using MediatorLiveData class because seems useful to update the source of a ...
1
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1answer
185 views

MVVMLight Toolkit Data Binding Technique

I'm simulating my real-world application by using a really simple demo app here, but it has the same concept. The question is MVVM Light Toolkit specific, as the ...
1
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0answers
172 views

Xamarin Forms with Ninject navigation service

I am new to Xamarin Forms and I have been searching online finding ways to set up navigation in a MVVM fashion. In particular I am designing around a concept I found here. However, I am using Ninject ...
5
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1answer
163 views

Accessing View from ViewModel

Having a view (grid control) that provides some functionallity via methods (primary SerializeView / DeserializeView) that should be called from the view model which is bound to the view. One point to ...
-1
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1answer
66 views

Model Exposure with MVVM [closed]

I have been starting to learn MVVM to give my WPF projects better structure. I have to sample classes, DeviceModel and ...
0
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1answer
150 views

Saving ResourceDictionary theme

I have the following command bonded to my button, It's supposed detect the current used theme and change it (Dark or Light). ...
2
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0answers
227 views

Switching between ViewModels using IoC in a MVVM WPF application

I have a project that uses Caliburn.Micro to implement the MVVM pattern. For IoC, I am using MEF. All the ViewModels are marked ...
4
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1answer
76 views

Viewport for Card Match Game

This is the 2nd half of my Memory game. The first half can be found here. The repository can be found on Github. I am using SFML 2.4.2. In this project I focused on a few key aspects of design and ...
6
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1answer
333 views

Winform, with a workaround to avoid dependencies

I'm working on a Winform project. We currently have a modular design (shown in the image) in our project. Where on every user action (button clicked or selection changed etc), first we set the Model ...
5
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1answer
465 views

Data Model for a Memory Game

I have a Memory style card matching game. The project is big enough that I want to break up the review. The first part that I am giving you is the data model. If you are interested the full project ...
4
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1answer
2k views

Login modal with MVVM pattern

I would like some feedback on whether this follows MVVM principles well. The MainPage has a Login button that opens the login modal page. Upon successful login, the LoginPageViewModel will raise an ...
2
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0answers
113 views

Initializing child windows in MvvM

I have a MvvM application that is working very fine. However I am not sure if I'm writing a clean code, especially the part handling child windows with their controller. So to begin, i have this ...
5
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2answers
482 views

Using a service interface to get user input from dialogs

I haven't worked with WPF/MVVM for a while, but now I'm back fixing some issues with one of my old apps and remembering the struggles I always had when dealing with asking for user input (eg. showing ...
1
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1answer
2k views

Testing async method call from constructor

I have a project where I want to build a more sophisticated ToDo list - basically a personal project management system. I'm just starting out with the project, and I'd like some feedback on whether my ...
1
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0answers
210 views

A ViewModel build with ReactiveUI 8 to get web images

This is a practice application that I built to learn Rx.Net & RxUI. It follows the MVVM pattern and is written in C# with WPF. Here is a link to a question I asked during the development, which ...
1
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1answer
278 views

Using Vue to help form validation with weight for age

I am refactoring a very old web page which calculates bolus and infusion drug doses for children from premature through to young adulthood. One of the most common drug errors is accidental 10 fold ...
1
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2answers
161 views

C# MVVM pattern sanity check

I am needing to get a sanity check to make sure I am setting up my model and viewmodel correctly. I believe what I have is correct even though I have seen some documentation that shows different ways ...
4
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2answers
2k views

Test all properties with single test function

In writing unit tests for c# functions, there is a good case made for testing properties. In testing those properties, I felt there should be a few goals. Provide a wide range of inputs Test ...
2
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0answers
854 views

Prism find active/existing ViewModel

I was facing an issue where I want to retrieve existing/active ViewModels from the Prism runtime. Here's the code I've done to achieve it: ...
1
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1answer
825 views

Combobox with multiple itemssources MVVM

I'm trying to make a list of either customers or suppliers based on a radio button. I have a solution that works but I want to know if it is a correct solution to work with the MVVM-model. Next to ...
3
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0answers
313 views

Media player in WPF - Event binding

I recently started making a media player, this is the first time I'm using WPF and I found that most project are utilizing the MVVM architectural pattern, I haven't used that one either but I decided ...
3
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1answer
937 views

MVVM Calling command by name from CommandBindings

For example I have this property in my ViewModel. ...
2
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1answer
2k views

MVVM pattern in Xamarin login form

Please let me know if the MVVM pattern I followed in this is correct or not. Here is the code for ViewModel ...
3
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1answer
677 views

Notify one of hundreds of viewmodels with MVVM Light messenger

Assume a viewmodel for hosting a collection of item viewmodels. There can be some hundreds of items in the collection. The items are part of the business model and have an id and a name. The name for ...
2
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1answer
277 views

Applying EF core in Universal Windows Apps using a large database

I am building my UWP app and really stuck in the architecture. For the past few days, I have been reading MVVM, Entity Framework, SQLite, Code First, etc and I am confused how I will implement ...
4
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1answer
757 views

Maintainable networking layer architecture

There are so many different solutions and examples on how to build a proper networking layer, but every app has different constraints, and design decisions are made based off trade-offs, leaving me ...
9
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4answers
670 views

ViewModels Mediator with multiple generic callbacks

I'm developing a mediator for an MVVM application. This application lets employees file tickets with IT support to ask for help. The mediator communicates messages and triggers callbacks between ...
2
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1answer
149 views

Extension vs Class For ViewModel

What the advantages & disadvantages to each of these approaches pertaining to creating file that takes care of the view configuration to reduce a controller's file size. Main Purposes Are: ...
2
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0answers
717 views

Handling single items using MVVM and Android Architecture Library

What I have done so far Since I would like to rebuild a project using mvvm-pattern with the following requirements to use dagger 2 for di, RXJava for reactive, retrofit for webservices, greendao and ...
1
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0answers
59 views

Weight Lifting App to calculate a One Rep Maximum

I'd like feedback on the main entity in the Core Data model of my "One Rep Max" weightlifting calculator. All feedback is appreciated and in particular, I'd like to know if I've done a decent job of ...
2
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1answer
3k views

Correct use of MVVM and MouseEvent Handling

My XAML looksl ike this: ...
0
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1answer
3k views

Simple MVVM Create, Update, Delete Records using WPF [closed]

I'm new to MVVM and WPF. Please suggest whether this is okay or I need to correct my understanding of MVVM which I confess is very limited as at the moment. The default namespace to all classes as <...
10
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2answers
875 views

CommandBinding refresh on parameter changed

I need the command I am executing on a datagrids context menu to know which column was clicked on. XAML ...
0
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2answers
1k views

Using “Lookup Logic” in a WPF Converter (vs extra properties in “model” classes) [closed]

There seems to be a point of contention on my project team regarding what method should be used when trying to display something about an object that requires "lookup-logic". Namely, should their be a ...
3
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2answers
1k views

MVVM Navigation WPF

Currently, I'm trying to learn every aspect of the MVVM design pattern. So basically I've written a little WPF App where I'm trying to understand Navigation in MVVM, the app has one MainView wich ...

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