Active Oldest Votes. Model is just data and notify data changes. Improve this answer. David David k 33 33 gold badges silver badges bronze badges. I'm a little confused about the controller "kind of" knowing about the view. What do you mean by "which View it should direct control"?
Can you elaborate? It receives a request or some input of some kind, interacts with the models to change system state based on that input, and directs output to a view.
So it "kind of" know about the views in the sense that it needs to know which one to direct as output. The view being rendered as output, conversely, does not know anything about the controller which just rendered it. The flow from controller to view is one-way.
Can that concept be generalized to composite views? BT: Ultimately the view is the UI presentation that's rendered to the user. But the end result is some kind of interactive interface for the user. Conceptually that is the view, physically that view may be composed of many different elements, any one or more of which may be called a "view" in its respective technology.
Add a comment. I'll go with the simple Bank analogy. Tellers are Views. Runners are Controllers. Bankers are Models. The Runners are used to transport the money data from the Bankers to the Tellers.
The Teller presents the money to the Customer. David East David East Same for me, this really easy example complements perfectly the accepted answer. Note that these can be any object instances. The diagram shows both views and controllers receiving updates here. They usually perform filtering or data transformation as well. View messages are a common theme in MVC. It is important that these are independent of the UI world - these are not mouse clicks and what not but a view-specific language of events.
This brings us to the next point. The view does not depend on the controller in any way. Controller's are responsible for arranging and creating views and providing the interface between the rest of the world and the view. In a perfect world, the view is responsible for making the model representation visible. This is how it worked when MVC was applied to desktop applications. Community Bot 1 1 1 silver badge. Shawley D. Shawley Sign up or log in Sign up using Google.
Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta. Now live: A fully responsive profile. Linked 6. Related The view then sends its final presentation to the controller, and the controller then sends the response to the browser, which then displays the response to the end-user.
Note Models, Views, and other components are linked together in a runnable application by the controllers. The user first inputs a particular contact record based on the contact id through the browser. The browser then sends a request to the controller that it wants a specific contact record. The controller then interacts with the model to get the contact record. The model will find the record from the database and then return it to the controller. Once the controller gets the record, it interacts with the view to generate the response.
The view will then present the record. The controller will then respond to the browser based on the HTML file from the view. In this tutorial, we have covered the basics of Model-View-Controller Architecture. We have also seen how the MVC architecture works. The most exciting thing about MVC is that it is not a single pattern.
Instead, it is a set of patterns that are used together to build a complex application. Peer Review Contributions by: Mercy Meave.
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For Infrastructure Providers. A controller is responsible for controlling the way that a user interacts with an MVC application. A controller contains the flow control logic for an ASP. A controller determines what response to send back to a user when a user makes a browser request. A controller is just a class for example, a Visual Basic or C class.
The sample ASP. The content of the HomeController. Notice that the HomeController has two methods named Index and About. These two methods correspond to the two actions exposed by the controller. About method. Any public method in a controller is exposed as a controller action. You need to be careful about this.
This means that any public method contained in a controller can be invoked by anyone with access to the Internet by entering the right URL into a browser. The two controller actions exposed by the HomeController class, Index and About , both return a view. A view contains the HTML markup and content that is sent to the browser. A view is the equivalent of a page when working with an ASP.
You must create your views in the right location. The HomeController. Index action returns a view located at the following path:. In general, if you want to return a view for a controller action, then you need to create a subfolder in the Views folder with the same name as your controller. Within the subfolder, you must create an. You can modify the contents of the view by entering any HTML that you want here.
NET Web Forms. A view can contain HTML content and scripts. You can write the scripts in your favorite. You use scripts to display dynamic content such as database data.
We have discussed controllers and we have discussed views. The last topic that we need to discuss is models. What is an MVC model? An MVC model contains all of your application logic that is not contained in a view or a controller. The model should contain all of your application business logic, validation logic, and database access logic. For example, if you are using the Microsoft Entity Framework to access your database, then you would create your Entity Framework classes your.
A view should contain only logic related to generating the user interface. A controller should only contain the bare minimum of logic required to return the right view or redirect the user to another action flow control. Everything else should be contained in the model.
In general, you should strive for fat models and skinny controllers. Your controller methods should contain only a few lines of code.
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