MVC

Model-View-Controller

ASP.NET MVC Pattern | .NETMicrosoft

MVC is a design pattern used to decouple user-interface (view), data (model), and application logic (controller). This pattern helps to achieve separation of concerns.

Model

• Responsible for bringing data to View.

• Data Access Layer

• Validation

  • Data Annotations

  • Client Validations

  • Remote Validations

View

• Responsible for rendering UI.

• Types

  1. WebForm View (.aspx, .ascx, .master)

  2. Razor View (.cshtml, .vbhtml)

@model - defines the type of data coming into the view

@Model - accesses the model data passed into the view

<form asp-action="Create" asp-controller="Home">

//asp-action: tells the razor what controller action we want to use
//asp-controller: is used to let our form know which controller to the find the action in
//without asp-controller, MVC will use the controller that matches the view's directory

Razor View

@{
    for (int counter = 1; counter <= 5; counter++)
    {
        <div>@counter</div>
    }
}

Controller

• Responsible for handling every user requests.

• Responsible for building the model and selecting a view to render.

• responsible for sending the data to the view.

• Methods that return IActionResult are called Action methods and provide responses usable by browsers.