Models and Controllers in ASP.NET Core MVC | Day 12 | Dot Net Tutorials | Pranaya Rout
Models and Controllers in ASP.NET Core MVC | Day 12 | Dot Net Tutorials | Pranaya Rout | Dot Net Online Training
What is a Model in ASP.NET Core MVC?
A model is a class with .cs (for C#) as an extension having both properties and methods. Models are used to set or get the data. If your application does not have data, then there is no need for a model. If your application has data, then you need a model.
The Model in an MVC application represents the state of the application and any business logic or operations it should perform. Business logic should be encapsulated in the model, along with any implementation logic for persisting the state of the application. Strongly typed views typically use ViewModel types designed to contain the data to display on that view. The controller creates and populates these ViewModel instances from the model.
What is the Role of Models in ASP.NET Core MVC Application?
The Models in ASP.NET Core MVC Application contain a set of classes representing the domain data (you can also say the business data) and logic to manage the domain/business data. So, in simple words, we can say that the Model is the component in the MVC Design pattern used to manage the data, i.e., the state of the application in memory. The Model represents a set of classes used to describe the application’s validation, business, and data access logic.
If you are working with any Web Application based on an MVC Design Pattern, then three things in that MVC Application are common, i.e., Model, View, and Controller. The Controllers are used to manage the overall flow of the MVC Application. Models are responsible for storing the data which are used on Views. Views are basically the HTML Pages that get rendered into the client's browser. In the browser, we generally perform two operations. First, we display the data to the user; second, we get the data from the user. For both these operations, models are used.
What is a Controller in ASP.NET Core?
A Controller is a special class in ASP.NET Core Application with .cs (for C# language) extension. By default, you can see the Controllers reside in the Controllers folder when you create a new ASP.NET Core Application using the Model View Controller (MVC) Project Template. In the ASP.NET Core MVC Application, the controller class should and must be inherited from the Controller base class.
Controllers in the MVC Design Pattern are the components that handle user interaction, work with the model, and ultimately select a view to render. In an MVC application, the one and only responsibility of a view is to render the information; the controller handles and responds to user input and interaction. In the MVC Design Pattern, the controller is the initial entry point responsible for selecting which model types to work with and which view to render (hence its name – it controls how the app responds to a given request).
The Controllers in the ASP.NET Core MVC Application logically group similar types of actions together. This aggregation of actions or grouping of similar types of action together allows us to define rules, such as caching, routing, and authorization, which will be applied collectively.
When the client (browser) sends a request to the server, that request first goes through the request processing pipeline. Once the request passes the request processing pipeline, it will hit the controller. Inside the controller, there are lots of methods (called action methods) that actually handle the incoming HTTP Requests. The action method inside the controller executes the business logic and prepares the response, which is sent back to the client who initially made the request.
Text Document Links:
Models in ASP.NET Core MVC: https://dotnettutorials.net/lesson/mo...
Controllers in ASP.NET Core MVC: https://dotnettutorials.net/lesson/co...
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