ASP.NET Core and Razor Quiz

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Questions and Answers

What does the CalculateFutureValue method in the FutureValueModel class primarily compute?

The number of months until the investment matures

The total investment over the years

The monthly interest rate based on yearly interest

The future value of investments after a specified time (correct)

In the FutureValueModel class, how is the monthly interest rate calculated?

YearlyInterestRate / 12

YearlyInterestRate * 0.01

YearlyInterestRate / 100 / 12 (correct)

YearlyInterestRate * 12

What is the primary purpose of the Razor view imports page?

To configure the application settings for ASP.NET Core

To simplify the usage of model classes and tag helpers in Razor views (correct)

To define the styles and scripts used across all views

To create a new Razor view automatically in the Views folder

What is the effect of the line '@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers' in the Razor view imports page?

It allows the use of all tag helpers from ASP.NET Core MVC (B) Signup and view all the answers

How many months are calculated in the CalculateFutureValue method for a given number of years?

Years * 12 (B) Signup and view all the answers

What does the line `Layout = null;` indicate in the Home/Index.cshtml view?

No layout will be applied to this view. (C) Signup and view all the answers

In the Program.cs file, what does the line `app.UseExceptionHandler("/Home/Error");` accomplish?

It sets up a custom error page when an exception occurs. (A) Signup and view all the answers

Which of the following statements is true regarding the HTTPS redirection in the generated Program.cs file?

It forces all HTTP requests to be redirected to HTTPS. (D) Signup and view all the answers

What is the purpose of the line `app.MapControllerRoute(...)` in the Program.cs file?

It maps the requests to specific controller actions based on the URL pattern. (B) Signup and view all the answers

How should a new model class be added in a Visual Studio project?

Right-click the Models folder and choose Add -> Class. (C) Signup and view all the answers

What is the first step to create a new project in Visual Studio?

Select FileNewProject from the menu system. (D) Signup and view all the answers

What must you provide after specifying the project name when configuring an ASP.NET Core MVC web app?

The location (folder) for the project. (B) Signup and view all the answers

When deleting files from the MVC template, which folders require their files to be emptied?

Controllers, Models, and Views folders. (B) Signup and view all the answers

To add a new controller in the MVC template, which dialog is used first?

Add New Scaffolded Item dialog. (D) Signup and view all the answers

Which statement accurately depicts the final action after naming a new Razor view?

Click the Add button. (A) Signup and view all the answers

What additional folders should be added within the Views folder in an Empty template?

Home and Shared folders. (D) Signup and view all the answers

In the HomeController.cs file, what value is assigned to ViewBag.FV?

$99999.99 (A) Signup and view all the answers

What is the purpose of clicking the Browse button when creating a new project?

To specify the project location. (D) Signup and view all the answers

What is the purpose of the Razor view imports page?

To contain directives for importing namespaces and view components (A) Signup and view all the answers

Which folders are typically included in an MVC web app by convention?

Controllers, Views, Models, wwwroot, Scripts, Content (D) Signup and view all the answers

How do HttpGet and HttpPost attributes function in ASP.NET Core MVC?

They specify the methods for handling HTTP requests based on their type (A) Signup and view all the answers

What is the primary role of the Model class in an MVC application?

To encapsulate data and business logic (B) Signup and view all the answers

What does the @model directive accomplish in a Razor view?

It specifies the type of data that the view expects to receive (A) Signup and view all the answers

What is the purpose of the Razor layout in an ASP.NET Core web app?

To define a consistent structure for multiple views (A) Signup and view all the answers

What is a key function of the ViewBag property in an MVC application?

To pass temporary data from a controller to a view (C) Signup and view all the answers

What is the primary use of the asp-controller and asp-action tag helpers in ASP.NET Core MVC?

To specify which controller and action method should be invoked for a form submission or navigation link (B) Signup and view all the answers

What is the correct CSS property to set the font for the body in the site.css file?

font-family: Arial, Helvetica, sans-serif; (C) Signup and view all the answers

What is the purpose of the `asp-for` tag helper in forms?

It binds a model property to a view element. (C) Signup and view all the answers

Which step is NOT required when adding a Razor view?

Specify a name for the layout page. (D) Signup and view all the answers

Which attribute indicates that an action method handles GET requests?

[HttpGet] (C) Signup and view all the answers

Which layout file is specified in the Views/_ViewStart.cshtml file?

_Layout.cshtml (B) Signup and view all the answers

What is the purpose of the Required attribute in data annotations?

To ensure the property is assigned a value. (A) Signup and view all the answers

What does the `View(model)` method return in a controller action?

It returns a view with the specified model data. (D) Signup and view all the answers

Which of the following is found in the Views/Shared/_Layout.cshtml file?

@RenderBody() (D) Signup and view all the answers

What happens when the Index() action method is invoked with an HTTP POST request?

The method calculates the future value and returns a model. (C) Signup and view all the answers

What controls the layout of the strongly-typed Index view?

The <code>Layout</code> property. (C) Signup and view all the answers

What should you do first to add a Razor layout to the Future Value app?

Right-click the Views folder. (B) Signup and view all the answers

Where should a CSS style sheet be stored in an ASP.NET Core application?

Inside the wwwroot folder. (D) Signup and view all the answers

What type of validation does the Range attribute provide?

Ensures values fall within a specified minimum and maximum range. (B) Signup and view all the answers

What is the correct order of the steps to add a CSS style sheet to an ASP.NET Core project?

Create wwwroot/css folder, right-click to add a new item, select Style Sheet. (D) Signup and view all the answers

Which of the following defines the padding for the body in the site.css file?

padding: 1em; (B) Signup and view all the answers

Which tag helper is used to define the action method for form submission?

asp-action (D) Signup and view all the answers

Study Notes

Murach's ASP.NET Core MVC (2nd Ed.) Chapter 2

Objectives (part 1): Given specifications for a one-page MVC web app, students will write C# code for the model and controller, and HTML for the Razor view. Students will also run an ASP.NET Core MVC web app on their computer. Knowledge objectives include using Visual Studio to create an ASP.NET Core project and adding necessary folders/files for an MVC web app, listing six folders included in an MVC web app by convention, and describing how a controller and its action methods work.

Objectives (part 2)

Data Transfer: Students will describe using the ViewBag property to transfer data from a controller to a view.
Razor Elements: Students will differentiate between a Razor code block and a Razor expression.
HTTP Pipeline: Students will describe how to configure the HTTP request and response pipeline for a simple ASP.NET Core MVC web app.
Model/Controller Distinction: Students will differentiate between a model class and a controller class.
Razor View Imports: Students will describe the purpose of a Razor view imports page.
Strongly-Typed Views: Students will describe how to use the @model directive and asp-for tag helpers to create strongly-typed views.
Form/Link helpers: Students will describe using asp-controller and asp-action tag helpers.

Objectives (part 3)

HTTP GET/POST: Students will describe how the HttpGet and HttpPost attributes allow action methods to handle HTTP GET or POST requests.
CSS Style Sheets: Students will describe the purpose of a CSS style sheet in an application.
Razor Layout/View: Students will describe the differences between a Razor layout and a Razor view.
Razor View Start: Students will describe the purpose of a Razor view start.
Data Validation: Students will describe how ASP.NET Core MVC validates user-entered data.

Creating a New Project

Steps: Select File → New → Project in Visual Studio, choose the appropriate template (e.g., Web App MVC), and click Next.

Configuring a New Project

Steps: Provide a project name and location; edit solution name if needed. Use the resulting dialog to provide additional information and click Create.

Visual Studio Project Structure

Folders: Visual Studio displays folders for the project, including wwwroot, Controllers, Models, and Views, among others.

Deleting Files from Template

Steps: Delete files in the Controllers and Models folders and their contents; expand the Views folder, delete its content files but not the folder.

Adding Folders to the Empty Template

Steps: Add the Controllers, Models, and Views folders; create Home and Shared folders within the Views folder.

Adding a Controller

Steps: Right-click on Controllers folder, select Add → Controller. Choose "MVC Controller - Empty" from the New Scaffolded Item dialog. Provide name and click Add.

`HomeController.cs` File

Content: Contains the controller with the Index() action method.

Adding a Razor View

Steps: Right-click the Views/Home folder and select Add → View. Select “Razor View – Empty” and click Add. Name the view index and click Add.

The `Home/Index.cshtml` View

Content: This file contains the markup for the view.

`Program.cs` File (Part 1)

Content: Contains the code for configuring the container and HTTP pipeline.

`Program.cs` File (Part 2)

Content: Specifies the routing and other configuration for the application.

Starting Button Drop-Down in Visual Studio

Functionality: This button provides options such as selecting an appropriate web browser for testing.

Future Value App in Chrome

Functionality: A demonstration of the Future Value web application running in the Chrome browser.

Error List Window in Visual Studio

Purpose: This window lists any errors during development.

Adding a Class (Model)

Steps: In Visual Studio, right-click the Models folder, select Add → Class. Provide a name and click Add.

FutureValueModel class

Content: Contains properties (MonthlyInvestment, YearlyInterestRate, Years) and a CalculateFutureValue() method.

Adding a Razor View Imports Page

Steps: In Visual Studio, right-click the Views folder and select Add → New Item. From the Installed/ASP.NET Core/Web category, choose Razor View Imports and click Add

The `Views/_ViewImports.cshtml` File

Content: imports page for models and tag helpers.

Common Tag Helpers for Forms

Explanation/Examples Tables display common HTML tags for forms.

Strongly-Typed Index View with Tag Helpers

Explanation: Describes how these helpers work to generate strongly-typed templates.

Action Method (checks for invalid data)

Explanation: This method checks the data validity using ModelState.IsValid

View with Validation Messages

Functionality: Displays summary of validation messages

The Future Value App with Invalid Data

Purpose: Example of an application with invalid user input data.

How to add a CSS stylesheet

Steps: Right-click the wwwroot/css folder and choose. Add → New Item from the ASP.NET Core→Web category; then select “Style Sheet” and enter a name.

The site.css file

Purpose/Content: The stylesheet file in the wwwroot/css folder stores CSS. This file contains CSS rules for the HTML elements in the Future Value application.

Add a Razor Layout

Steps: Right-click Views/Shared folder, select Add → New Item in Visual Studio; from the ASP.NET Core→WEB category, choose Razor Layout item, and click Add.

Add a Razor View Start

Steps: Right-click Views folder, choose Add → New Item in Visual Studio. Select Razor View Start in the ASP.NET Core → Web category and click Add.

The `Views/Shared/_Layout.cshtml` File

Content: Specifies the layout for the views in the application. It includes elements like meta tags, page titles.

How to add a Razor view

Steps: In Visual Studio, right-click Views/{subfolder} folder, select Add → View. Select a Razor View and provide desired details.

The `Views/Home/Index.cshtml` File (Part 2)

Content: Contains the ASP.NET Core markup supporting form fields for the user’s inputs.

How to import the DataAnnotations namespace

Instructions: Import this namespace.

A model property with a validation attribute (with sample)

Description: Attributes like [Required] and [Range] in Model classes.

A model property with user-friendly error messages (with sample)

Description: Custom error messages in validation attributes.

The Model Class with Data Validation Attributes

Description: The structure of the future value model with attributes for data validation

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Description

Test your knowledge on ASP.NET Core concepts, including the FutureValueModel class, Razor view imports, and application configuration in Program.cs. This quiz covers key functionality and best practices within the framework, focusing on core components and their interactions.