The Model View ViewModel (MVVM) is an architectural pattern used in software engineering that originated from Microsoft as a specialization of the presentation model design pattern introduced by Martin Fowler.

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Should MVVM ViewModel inject an HTML template for default view?

I'm working on web application design that includes Knockout.js and have an overall MVVM question: Does it make sense for the ViewModel to automatically inject a default HTML template (pulled from ...
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2answers
256 views

What is this variation of MVC in JavaScript?

I am working on sorting out my Javascript code. Currently I have views implemented without any Model or collection. Now I working on separating Model from View. So for this transformation, I am ...
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480 views

Should code-behind in WPF be considered part of the view?

I've read plenty of articles around different patterns in use with WPF and this is something I've yet to understand: should a code-behind file be considered part of the view? As a consequence, should ...
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3answers
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MVVM Clarification

We are about to write our first WPF application and are becoming familiar with the MVVM pattern. We've built many Winform applications and have an architecture that has been very successful for us. ...
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3answers
3k views

How to organize MVVM files in solution

I'm fairly new to the MVVM concept but like a lot of the flexibility it gives me so far. However, I'm struggling to find a good way to manage my code. I have several classes that are just sitting in ...
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2answers
476 views

WCF service as a proxy for publishing real-time data to a WPF/MVVM clients

I've been tasked with creating a dashboard application to show real time updates for our servers. The raw data comes in from an XML file on our intranet which I need to parse and present to the user. ...
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1answer
77 views

For a front-end application broken down in a MV* manner, should I have models dedicated to UI logic?

I am not talking about simple UI logic like clicking a button directs you to another page, but where one action may result in several different of behavior depending on current application state, and ...
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1answer
404 views

Distinguishing between UI command & domain commands

I am building a WPF client application using the MVVM pattern that provides an interface on top of an existing set of business logic residing in a library which is shared with other applications. The ...
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1answer
344 views

What is the good way of sharing specific data between ViewModels

We have IAppContext which is injected into ViewModel. This service contains shared data: global filters and other application wide properties. But there are cases when data is very specific. For ...
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1answer
728 views

Are all View Models supposed to be accessed through the Main View Model in MVVM?

I am currently working on a WP8 application. My current design is to have each view bind against a specific view model directly. Looking through the samples though, it seems that another way is to ...
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1answer
394 views

Is there a clean separation of my layers with this attempt at Domain Driven Design in XAML and C#

I'm working on an application. I'm using a mixture of TDD and DDD. I'm working hard to separate the layers of my application and that is where my question comes in. My solution is laid out as ...
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2answers
2k views

Hierarchical View/ViewModel/Presenters in MVPVM

I've been working with MVVM for a while, but I've recently started using MVPVM and I want to know how to create hierarchial View/ViewModel/Presenter app using this pattern. In MVVM I would typically ...
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3answers
721 views

How do I know if I'm violating MVVM with WPF? [closed]

I was recently grabbing an auto generated TreeViewItem from a nested TreeView node in WPF, and I was using ItemContainerGenerator to get it in code behind. Then I thought to myself I'm certainly ...
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4answers
4k views

How to make creating viewmodels at runtime less painful

I apologize for the long question, it reads a bit as a rant, but I promise it's not! I've summarized my question(s) below In the MVC world, things are straightforward. The Model has state, the View ...
4
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1answer
182 views

Contract / Project / Line-Item hierarchy design considerations

We currently have an application that allows users to create a Contract. A contract can have 1 or more Project. A project can have 0 or more sub-projects (which can have their own sub-projects, and so ...
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3answers
1k views

MVVM - child windows and data contexts

Should a child window have it's own data context (View-Model) or use the data context of the parent? More broadly, should each View have its own View-Model? Are there are any rules to guide making ...
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1answer
3k views

WPF, MVVM, EF, POCO guidance required on simple architecture

(sorry for my poor english) I am developing a application using WPF, EF Code First using MVVM (Caliburn.Micro). It should be used mostly to CRUD work. I created a BaseViewModel<T> class from ...
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3answers
5k views

MVVM, DDD, and WPF Layered Application Project Structure Guidance

I am trying to setup my application's structure in VS and I want to "try" and future proof it to a reasonable level. This application will be a WPF re-write of an old Winform app that had followed no ...
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1answer
141 views

Add complex customization to form or create two forms?

I'm working in a WPF application that both imports and exports delimited text files. At both ends, there is a UserControl which encapsulates some logic about delimiter configuration. It has some ...
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2answers
405 views

Given the presentation model pattern, is the view, presentation model, or model responsible for adding child views to an existing view at runtime?

I am building a Flex 4 based application using the presentation model design pattern. This application will have several different components to it as shown in the image below. The MainView and ...
5
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1answer
338 views

wizard-like data collection implementation help (next, next, finish)

I'm beginning to build an interface for our field techs to close out work orders and we have many different required paper forms for different customers. I had hoped to build a system where i can set ...
2
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1answer
114 views

How to verify the client's view is consistent with the remote model?

i'm designing a client-server system via web broswser and i have this problem: I send the data to the client via JSON, then the javascript view shows the stuff. Then the user takes actions and ...
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1answer
156 views

What conventions or frameworks exist for MVVM in Perl?

We're using Catalyst to render lots of webforms in what will become a large application. I don't like the way all the form data is confusingly into a big hash in the Controller, before being passed to ...
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1answer
1k views

Which notification pattern is preferable?

I'm working on a view model for a view that presents a dialog with export options. The user selects options then clicks Export. When the view model completes the Export, the calling view model ...
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1answer
305 views

Need suggestion for Mutiple Windows application design

This was previously posted in StackOverflow, I just moved to here... I am using VS2008, MVVM, WPF, Prism to make a mutiple window CRM Application. I am using MidWinow in my MainWindow, I want Any ...
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2answers
2k views

Creating controls dynamically in the code-behind or ViewModel?

Right now I'm working migrating an app I made entirely using code behind to MVVM and had a question on where I'm supposed to be creating controls dynamically. Basically I have a web service that ...
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1answer
267 views

Is a silverlight UserControl considered a view?

So far I have been implementing MVVM in my silverlight app pretty well, I just had one question. I have a few User Controls that I made and was wondering if they should be placed in the Views folder ...
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How to use a MessageBox using the MVVM pattern?

I am implementing a UI application using the MVVM design-pattern. The thing is, sometimes when you detect that something is wrong with data that was inputted by the user, you'd like to notify him ...
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2answers
1k views

MVVM Reporting App Approach ? Data Access Layer?

I'm trying to follow the MVVM pattern in a reporting / statistics application that I'm making in C# / WPF. I have made many model classes to hold properties as a starting point. Some of these models ...
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1answer
1k views

How do you do to create the ViewModel part of your MVVM designs?

Sometimes, when I plan to create a program using this architectural pattern, I've got a lot of difficulties when I'm in the View Model phase. I'm using WAF Framework to develop this architectural ...
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5answers
3k views

Should we bind view to a model property or ViewModel should have it's own..?

I am starting a project with following technical environment : .Net 4.0, Entity Framework 4.0, WPF with MVVM Architecture I saw lots of examples on the net, some books with this environment. In some ...
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3answers
9k views

Who should control navigation in an MVVM application?

Example #1: I have a view displayed in my MVVM application (let's use Silverlight for the purposes of the discussion) and I click on a button that should take me to a new page. Example #2: That same ...
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3answers
2k views

What are the pros and cons of the MVVM architecture?

In class today we were introduced to the MVVM architecture for Silverlight/WinPhone/WPF; it looks nice for big projects, but what are your thoughts on MVVM? What are the pros and cons? I want to get ...
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Are value converters more trouble than they're worth?

I'm working on a WPF application with views that require numerous value conversions. Initially, my philosophy (inspired in part by this lively debate on XAML Disciples) was that I should make the view ...
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1answer
3k views

Trying to learn how to use WCF services in a WPF app, using MVVM

We're working on a major re-write of a legacy VB6 app, into a WPF app. I've written several WCF services, which are meant to be used with the new WPF app. We want to use the MVVM design pattern to ...
4
votes
1answer
540 views

When should the presentation model design pattern include one or more controllers?

I have been researching the usage of the Presentation Model design pattern for an application I am preparing to build. The specific technology I will be using is Flex though I doubt that it matters ...
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2answers
582 views

Examples of MVVM adoption outside the Microsoft community?

IS MVVM getting any kind of traction outside the Microsoft community? Within Silverlight this is a non-issue, but for other technologies, like JavaScript it surely is: For instance Knockout.js is a ...
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4answers
3k views

Lists & Collections in MVVM - which approach to take?

I'm currently working on a Silverlight app using Caliburn.Micro. At present, we have Views (eg: PeopleView) and View Models (eg: PeopleViewModel) that equate to 'pages' of the application. ...
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1answer
430 views

MVVM light Communication

I am working on a large MVVM application. I am using the MVVM light toolkit for this. The application is like a web browser with back and forward buttons. The main view is an user control. I laid the ...
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Silverlight 5 and MVVM. Do I really need other frameworks? What is the best way for rapid development?

I've been reading and watching videos on MVVM and Silverlight.. I'm pretty new to Silverlight but not new to .NET. Interesting that I used MVVM in my WPF apps without knowing that it's MVVM. I was ...
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2answers
517 views

How can I “get in the know”?

My company posted a job listing to get me a helper. A recruiter called me today and all he kept saying was "MVC this Entity Framework that..." - He sounded shocked when I said the project uses ...
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10answers
14k views

When does implementing MVVM not make sense

I am a big fan of various patterns and enjoy learning new ones all the time however I think with all the evangelism around popular patterns and anti-patterns sometimes this causes blind adoption. I ...
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3answers
5k views

MVVM or MVC? Want to use the same set of classes for WPF and ASP.NET

I am a newbie in terms of Design Patterns. I just started learning MVC when I am hearing a new buzz, MVVM. I want to learn the insights of both of these by redesigning an old inventory and invoicing ...
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2answers
346 views

Multi sourced search in WPF app

If Iā€™m using the MVVM pattern ā€“ this one for my WPF application And my project requires a search function on different sources ā€“ say clients, accountants, cases. What would be the best way to go ...
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4answers
2k views

Has the MVVM pattern been adopted widely in real world Silverlight projects?

MVVM pattern is a hot word recently and I am planning to learning and refactor my existing project into this pattern. I have no experience and foresight of the potential risk. Have you guys really ...
6
votes
3answers
615 views

What are the rules for coupling a ViewModel and a View in the MVVM pattern?

So given the Separation of Concerns, how coupled should the View and ViewModel be? For example, I want the visibility of a Control in the View to be databound (databinded?) to a flag in the ...
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4answers
387 views

What determines when an application requires mvvm?

I'm developing mobile applications for Windows Phone 7. This application calls some web services and occasionally sends responses out via web services. I recently started looking into MVVM and noticed ...
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2answers
381 views

What is the most pragmatic & basic UI pattern to follow for Silverlight and/or WPF

Here is the context. The apps will: consume existing (and standard) web services. app is UI intensive (UI updated frequently and lot of data to display). development team experience level is ...
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1answer
1k views

Is it common/correct using MVVM to expect multiple views and corresponding view-models for a particular model?

Consider a somewhat contrived model that goes something like: class Player { public int Health; public int Ammo; public Weapon CurrentWeapon; public PhysicalState State { ...
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1answer
1k views

Is ViewModel with more than one repository bad?

I'm working on a project with MVVM. Some ViewModels have more than one repository. Is ViewModels with more than one repository bad? Please provide with why it's good/bad.