Questions tagged [mvvm]

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

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votes
1answer
4k views

ReactiveUI And WPF - Reusing a value to update multiple properties

I've created my first ReactiveUI app in WPF. Simply, the user enters their full name in one textbox, and then the name gets split into its parts and displayed in the other textboxes. This is just an ...
4
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1answer
59 views

FindAllReferencesCommand 2.0

Rubberduck 2.0 will feature a "Search Results" dockable toolwindow that will be used for displaying the results of Find all references, Find all implementations, and whatever else we need to find. It ...
7
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1answer
447 views

MVVM: Am I doing it right?

I read a lot of articles recently concerning XAML, WPF, data binding and MVVM. I also watched some MVVM tutorials and downloaded some MVVM samples. I finally got my first MVVM sample to work, but ...
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0answers
165 views

Saving the state of a ViewModel

I've the following scenario, I've got some viewmodel that need to persist their state on disk. I've defined a custom attribute as: ...
3
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1answer
531 views

Unity Repository Best Practices

I am now developing a product, which will use Unity & Repositories when it comes to data management. I will demonstrate on a simple example. What we want to do, ...
7
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4answers
13k views

Improvements to a ViewModelBase

Every time I go to write an MVVM application (say every 4-6 months) I rewrite my ViewModelBase class. This is for a range of reasons but let's say either I don't ...
1
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1answer
69 views

Randomly choose a game executable from a folder 2.0

After asking Randomly choose a game executable from a folder, I applied the recommended changes. I also redesigned the program to make use of the MVVM (Model-View-Viewmodel) paradigm, using Prism 6.0. ...
5
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1answer
2k views

DialogService which can return a result and closes Window

I wanted to have a DialogService that can return an arbitrary result. The views to be displayed are implemented as UserControls, and UserControls cannot close themselves (nor directly the parent ...
10
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1answer
258 views

Code Explorer 2.0: A folder hierarchy to organize VBA projects

Next release of Rubberduck will introduce a very cool @Folder annotation system that the Code Explorer will use to organize modules into - you guessed it - folders: ...
10
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3answers
10k views

Pong game in WPF

I would especially like to find out how this project should be constructed to be "fully MVVM". I did some reading about MVVM and I started to implement some ideas, but I don't fully understand it yet....
4
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1answer
2k views

MVVM light message handling

Recently I started to use mvvm light messenger and it lead to creating this ugliness which I have to refactor now. What would be the best future proof way to refactor this whole class? ...
3
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1answer
1k views

WPF Binding to a Repository with Entity-Framework

I have an MVVM WPF application that will make use of a repository and unit-of-work. This is my Entity Framework database-first model: ...
13
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1answer
11k views

A ViewModel using ReactiveUI 6 that loads and sends data

Most of the Rx Compelling Examples™ load and store data locally, which I don't find that Compelling. I spent some time coming up with how to best perform the following actions but want to make sure I ...
3
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1answer
259 views

Closing Tab Item Confirmation

For this project I'm targeting .NET 4.6 with Prism 6 as a toolkit to implement correct MVVM patterns. The code below allows me to raise a dialog box with Yes, No, Cancel buttons. If the user clicks '...
4
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2answers
24k views

Access View from current/corresponding ViewModel

Sometimes when developing a WPF application, I need to access a certain Window (View) from the corresponding ...
0
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1answer
96 views

Data binding with keydown

I want to create a JS MVVM framework for learning and personal project. jsFiddle HTML: ...
5
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3answers
401 views

Fetching, adding, and viewing games

This is a simple application that will eventually manage certain files for video games. For now, I'm only posting code that handles fetching, adding, and viewing games. I'm trying to keep things ...
4
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0answers
295 views

Unit of work with Repository pattern

I am trying to work on a WPF application and decided to go for Unit of Work and Repository pattern, along with MVVM. I am using Entity Framework as my ORM. Could ...
6
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1answer
2k views

Passing a password to a viewmodel

I've got a project I've been working on that connect to a file server and writes some data to a text file. In order to do this I added a textbox for the user to type their username and a passwordbox ...
4
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1answer
1k views

WPF MVVM Navigation

Following a lot of research and mainly based on this tutorial I came up with the following structure in my application: ObjectBase - all view models inherit it: ...
8
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1answer
290 views

TestExplorer 2.0 - From Grid to TreeView

Rubberduck's unit testing feature (heck, the whole project) started with a VBA unit testing framework that was ported from vba to c#; the VBA logic was pretty much simply rewritten in another language,...
4
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0answers
3k views

WPF MVVM Dialog with Prism, MahApps.Metro

I am building a Metro-themed WPF application with MVVM approach using Prism and MahApps.Metro. I have to show a custom dialog from view model. Currently, I am using ...
2
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1answer
75 views

Organizing museum artwork

I have a small Django project to help organize museum artwork. In my models.py file, my museum object is defined as follows: ...
5
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1answer
469 views

WPF application depending on large file

I've got a quite simple WPF application, trying to implement a correct MVVM pattern. The application in itself is simple: one listItem and one textbox + button for searching. On init, the entire ...
12
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2answers
955 views

MVVM data binding for a video encoding form

I am creating a C# WPF application. I am intending to bind all of the GUI controls via data binding to my ViewModel, rather than code behind - as per MVVM. I have ...
3
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1answer
3k views

Controlling a Windows Service from a WPF app

I have a WPF Control Panel app, where I'm trying to stay close to an MVVM architecture. The control panel (the "the CP") is for a WCF service ("the Scheduler"), hosted in a Windows Service ("the Host")...
1
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1answer
529 views

Dealing with the need to pass the root view model down to the children

I tend to feel the need in my Knockout applications to pass along a reference of the root view model down to the sub view models. However, I don't like the fact that I then have a dependency that lies ...
2
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1answer
8k views

Asynchronous method and collection binding

I have a WPF application, in which I'd like to bind a collection to a combobox using an asynchronous method : ...
5
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2answers
91 views
3
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1answer
979 views

Using list of tasks to obtain and cache data

I develop Windows Phone App with Prism framework (MVVM). I use data caching. To get data I use proxy service. Proxy service creates two ...
8
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1answer
2k views

MVVM implementation based on Jason Dolinger's video

I've learned MVVM for a week or so, and I've seen the Jason Dolinger video many times. Step by step, following the Jason Dolinger video, I've created my own application which is almost the same to the ...
4
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2answers
403 views

MVVM, Navigation, and More - Part 3

This is actually a second follow-up to Correct MVVM format, but I have made different changes. This is my ViewModel.cs class for my MainPage.xaml: ...
4
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1answer
424 views

Reacting to Boolean state in reactive ViewModels

When this ViewModel loads we kick off the IsAuthenticatedCommand: If the result of ...
6
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1answer
158 views

Manage a collection of settings in memory with global scope

I have a WPF app and a bunch of read/write settings that need to be accessible from various view models. a setting can be any type (string, ...
6
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2answers
10k views

WPF Window with different DataTemplates

I have to do a task hard for me and maybe you can help me. I've tried to design a window dialog to update data from a database view. This database view contains integer, DateTime, string, Time, ...
3
votes
1answer
76 views

View model usage

I'm about to start work on a large project using MVVM design pattern. I've worked on smaller projects in the past using MVVM, but I want to make sure my approach to MVVM is good/manageable as possible ...
7
votes
2answers
151 views

Correct usage of MVVM and object for method

I'm writing my first C# Windows Store app and am learning C# from scratch. I'm trying to implement MVVM as I understand it and object orientated patterns, obviously though I'm expecting to be doing it ...
2
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1answer
159 views

Implementing a POCO editor split over a number of TabItems

I am currently working on a project which uses the MVVM pattern. I have a POCO which I want to present in an editor and, because the object is composed from a number of smaller, reusable POCOs, I ...
3
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2answers
936 views

Creating list ViewModels in the correct way

I'm using Caliburn Micro to create a WPF application. So what I want to do here is a typical Master/Detail situation. I'm displaying a list of Users and you can can add/edit a User and save the ...
2
votes
1answer
149 views

Structuring objects for proper MVVM in Knockout

I'm working with knockout and am trying to stay true the MVVM structure and trying to make the objects have that dependency on each other. Model, ViewModel, Service definitions: ...
2
votes
1answer
3k views

Saving a collection of WPF user control layout into an XPS document

I am making an application to save a layout of user control into an .xps document. But, the export doesn't seem completed if the data is too many. I've tried to encapsulate each part with ...
5
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2answers
2k views

Caliburn Micro communication between list and edit viewmodels

I'm new at Caliburn Micro and the MVVM pattern. I have 3 views (with its corresponding viewmodels): AppView ClientsView ...
2
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0answers
586 views

Nhibernate repository for MVVM applications

I am developing a single user .net desktop application that lists numerous (over 2000) contacts sorted by an algorithm. I use NHibernate and did consider a session ...
6
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1answer
471 views

Fat ViewModels for editing images

How should I deal with ViewModels that are "fat"? Or should I just accept it sometimes. Example - one of my ViewModels (editing ...
17
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2answers
5k views

Understanding the MVVM concepts and validation of my code

I have been learning MVVM concepts and trying to implement it in my new project. I want to validate my work that I have been doing these past days. I want to know if I follow correctly the MVVM ...
3
votes
1answer
868 views

Implementing ViewModel design pattern using DI in a MVP-VM architecture

Based on this answer: MVVM implementation using C# and XAML, I understand that my ViewModel is some kind of a wrapper for my Model. Being a fan of DI and SOLID principles, I have made my ViewModel ...
8
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2answers
4k views

Add or view pattern with MVVM

I have a model called WorkOrder which I want to be able to manage from a single window. The required operations (for now) are only Insert and view, so this is what ...
5
votes
1answer
2k views

Caliburn.Micro nested ViewModels

I am currently developing a small tool intended to help me keep track of the myriad of characters in my Stories. The tool does the following: Load the characters which are currently stored as json ...
3
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1answer
2k views

Unit of Work with Generic Repository Pattern MVVM, vol. 4

Continuation of this question: Unit of Work with Generic Repository Pattern MVVM, vol. 3 I have made some changes. The methods GetFeedBySomething() have been ...
2
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2answers
663 views

Select item of IEnumerable<T> in UI (MVVM)

Please, help improve following code. I have list of users, item of the list has buttons remove (remove user from list) and profile (navigate to user profile). I use ...