What is difference between MVC MVP MVVM design pattern in terms of coding c

Question

If we search Google using the phrase  quot differences between MVC  MVP  amp  MVVM design pattern quot  then we may get a few URL s which discuss the difference between MVC MVP  amp  MVVM design pattern theoretically like  MVP Use in situations where binding via a  quot dataContext quot  is not possible  Windows Forms is a perfect example of this   In order to separate the view from the model  a presenter is needed   Since the view cannot directly bind to the presenter  information must be passed to the view via an interface  IView   MVVM Use in situations where binding via a  quot dataContext quot  is possible   Why   The various IView interfaces for each view are removed which means less code to maintain  Some examples where MVVM is possible to include WPF and javascript projects using Knockout  MVC Use in situations where the connection between the view and the rest of the program is not always available  and you can   t effectively employ MVVM or MVP   This clearly describes the situation where a web API is separated from the data sent to the client browsers   Microsoft   s ASP NET MVC is a great tool for managing such situations and provides a very clear MVC framework  But I have not found a single article which discusses the difference theoretically along with sample code  It would be really nice if I get an article that discusses the difference between these 3 design patterns  MVC  MVP  amp  MVVM  along with code  I d like to get my hands on the source code of 3 similar CRUD apps that have been implemented by these three design patterns  MVC  MVP  amp  MVVM   So that I can go through the code and understand how one should write code for these three design pattern  MVC  MVP  amp  MVVM   So if any such article exists which discusses how code would look different for these 3 design patterns  MVC  MVP  amp  MVVM  then please redirect me to that article

User · Answer

Some basic differences can be written in short:

MVC:

Traditional MVC is where there is a

Model: Acts as the model for data
View : Deals with the view to the user which can be the UI
Controller: Controls the interaction between Model and View, where view calls the controller to update model. View can call multiple controllers if needed.

MVP:

Similar to traditional MVC but Controller is replaced by Presenter. But the Presenter, unlike Controller is responsible for changing the view as well. The view usually does not call the presenter.

MVVM

The difference here is the presence of View Model. It is kind of an implementation of Observer Design Pattern, where changes in the model are represented in the view as well, by the VM. Eg: If a slider is changed, not only the model is updated but the data which may be a text, that is displayed in the view is updated as well. So there is a two-way data binding.

User · Answer

MVC  MVP  MVVM MVC  old one  MVP  more modular because of its low-coupling  Presenter is a mediator between the View and Model  MVVM  You already have two-way binding between VM and UI component  so it is more automated than MVP   Another image

User · Answer

Great Explanation from the link   http   geekswithblogs net dlussier archive 2009 11 21 136454 aspx  Let s First look at MVC  The input is directed at the Controller first  not the view  That input might be coming from a user interacting with a page  but it could also be from simply entering a specific url into a browser  In either case  its a Controller that is interfaced with to kick off some functionality   There is a many-to-one relationship between the Controller and the View  That   s because a single controller may select different views to be rendered based on the operation being executed   There is one way arrow from Controller to View  This is because the View doesn   t have any knowledge of or reference to the controller   The Controller does pass back the Model  so there is knowledge between the View and the expected Model being passed into it  but not the Controller serving it up   MVP     Model View Presenter  Now let   s look at the MVP pattern  It looks very similar to MVC  except for some key distinctions   The input begins with the View  not the Presenter   There is a one-to-one mapping between the View and the associated Presenter   The View holds a reference to the Presenter  The Presenter is also reacting to events being triggered from the View  so its aware of the View its associated with   The Presenter updates the View based on the requested actions it performs on the Model  but the View is not Model aware   MVVM     Model View View Model  So with the MVC and MVP patterns in front of us  let   s look at the MVVM pattern and see what differences it holds   The input begins with the View  not the View Model   While the View holds a reference to the View Model  the View Model has no information about the View  This is why its possible to have a one-to-many mapping between various Views and one View Model   even across technologies  For example  a WPF View and a Silverlight View could share the same View Model

User · Answer

MVP  Advantages  Presenter will be present in between Model and view Presenter will fetch data from Model and will do manipulations for data as view wants and give it to view and view is responsible only for rendering  Disadvantages  1 We can t use presenter for multiple modules because data is being modified in presenter as desired by one view class  3 Breaking Clean architecture because data flow should be only outwards but here data is coming back from presenter to View  MVC  Advanatages  Here we have Controller in between view and model Here data request will be done from controller to view but data will be sent back to view in form of interface but not with controller So here controller won t get bloated up because of many transactions  Disadvantagaes  Data Manipulation should be done by View as it wants and this will be extra work on UI thread which may effect UI rendering if data processing is more  MVVM  After announcing Architectural components we got access to ViewModel which provided us biggest advantage i e it s lifecycle aware So it won t notify data if view is not available It is a clean architecture because flow is only in forward mode and data will be notified automatically by LiveData  So it is Android s recommended architecture  Even MVVM has a disadvantage  Since it is a lifecycle aware some concepts like alarm or reminder should come outside app So in this scenario we can t use MVVM

User · Answer

The image below is from the article written by Erwin van der Valk     The article explains the differences and gives some code examples in C

[c#] What is difference between MVC, MVP & MVVM design pattern in terms of coding c#

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