Explain the role of the various components of the MVC pattern?

1.	Explain the role of the various components of the MVC pattern?
Answer» Model: Represents all the data and business logic that the user works within a web application. In ASP.NET, the model is represented by C# classes that hold the data and the related logic that operates on that data. The 'Models' directory STORES the model classes. For example, a model class representing a blog post might look like this: // Models/Post.csnamespace app.Models{ PUBLIC class Post { public int ID { get; set; } public string Title { get; set; } public string Body { get; set; } }} View: Represents all the UI logic of the application. In a web application, it represents the HTML that's sent to the user and displayed in the browser. One important thing to remember is that this HTML is not static or hard-coded. It's generated dynamically by the controller using a model's data. In ASP.NET, the 'Views' directory CONTAINS the views in files ending with the .cshtml file extension. To continue our example of a blog post, a view to render a post might be: // Views/Post.cshtml<div class="post"> <div class="title"> <a href="/posts/@post.ID">@post.Title</a> </div> <div class=body> @Html.Raw(post.Body) </div></div> Controller: ACTS as an interface between Model and View. It processes the business logic and incoming requests, manipulates data using the Model, and interacts with the Views to render the FINAL output. In ASP.NET, these are C# classes that form the glue between a model and a view. They handle the HTTP request from the browser, then retrieve the model data and pass it to the view to dynamically render a response. The 'Controllers' directory stores the controller classes. A PostController that builds the view for the post by fetching the Post model will be: // Controllers/PostControllernamespace app.Controllers{ public class PostsController : BaseController { public IActionResult Post(int id) { // Get the post from the database Post post = _service.Get(id); // Render the post.cshtml view, by providing the post model return View(post); } }}

Answer»

Model: Represents all the data and business logic that the user works within a web application. In ASP.NET, the model is represented by C# classes that hold the data and the related logic that operates on that data. The 'Models' directory STORES the model classes.

For example, a model class representing a blog post might look like this:

// Models/Post.csnamespace app.Models{ PUBLIC class Post { public int ID { get; set; } public string Title { get; set; } public string Body { get; set; } }}

View: Represents all the UI logic of the application. In a web application, it represents the HTML that's sent to the user and displayed in the browser.

One important thing to remember is that this HTML is not static or hard-coded. It's generated dynamically by the controller using a model's data. In ASP.NET, the 'Views' directory CONTAINS the views in files ending with the .cshtml file extension.

To continue our example of a blog post, a view to render a post might be:

// Views/Post.cshtml<div class="post"> <div class="title"> <a href="/posts/@post.ID">@post.Title</a> </div> <div class=body> @Html.Raw(post.Body) </div></div>

Controller: ACTS as an interface between Model and View. It processes the business logic and incoming requests, manipulates data using the Model, and interacts with the Views to render the FINAL output.

In ASP.NET, these are C# classes that form the glue between a model and a view. They handle the HTTP request from the browser, then retrieve the model data and pass it to the view to dynamically render a response. The 'Controllers' directory stores the controller classes.

A PostController that builds the view for the post by fetching the Post model will be:

// Controllers/PostControllernamespace app.Controllers{ public class PostsController : BaseController { public IActionResult Post(int id) { // Get the post from the database Post post = _service.Get(id); // Render the post.cshtml view, by providing the post model return View(post); } }}

Explain the role of the various components of the MVC pattern?

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment