Book Image

ASP.NET Core 2 Fundamentals

By : Onur Gumus, Mugilan T. S. Ragupathi
Book Image

ASP.NET Core 2 Fundamentals

By: Onur Gumus, Mugilan T. S. Ragupathi

Overview of this book

The book sets the stage with an introduction to web applications and helps you build an understanding of the tried-and-true MVC architecture. You learn all about views, from what is the Razor view engine to tagging helpers. You gain insight into what models are, how to bind them, and how to migrate database using the correct model. As you get comfortable with the world of ASP.NET, you learn about validation and routing. You also learn the advanced concepts, such as designing Rest Buy (a RESTful shopping cart application), creating entities for it, and creating EF context and migrations. By the time you are done reading the book, you will be able to optimally use ASP.NET to develop, unit test, and deploy applications like a pro.

Related Content you might be interested in

Current Title:

Small book image
ASP.NET Core 2 Fundamentals
Onur Gumus | Mugilan T. S. Ragupathi
Aug, 2018 | 298 pages
Small book image
Modern Web Development with ASP.NET Core 3
Ricardo Peres
Jun, 2020 | 802 pages
Small book image
Mastering ASP.NET Core 2.0
Ricardo Peres
Nov, 2017 | 494 pages
Small book image
.NET Core 2.0 By Example
Rishabh Verma | Neha Shrivastava
Mar, 2018 | 458 pages
Table of Contents (14 chapters)
Title Page
Title Page
Packt Upsell
Packt Upsell
Contributors
Contributors
Preface
Preface
Free Chapter
1
Setting the Stage
Setting the Stage
Introduction to Web Applications
Introduction to ASP.NET
Summary
2
Controllers
Controllers
Role of the Controller in ASP.NET MVC Applications
Introduction to Routing
Installing the ASP.NET Core NuGet Package in Your Application
Our First Controller
Adding Views
Adding Models
Passing Data from the Controller to the View
Filters
Summary
3
Views
Views
The View Engine and the Razor View Engine
Layout
Generating HTML
Partial View
View Components
Tag Helpers
Summary
4
Models
Models
Introduction to Models
Model Binding
Entity Framework
Using Entity Framework in ASP.NET MVC Applications
Database Migration
Summary
5
Validation
Validation
Introduction to Validation
Client-Side and Server-Side Validation
Server-Side Validation
Client-Side Validation
Implementation
Summary
6
Routing
Routing
Convention-Based Routing
Attribute-Based Routing
Route Attribute at the Controller Level
Route Constraints
Summary
7
Rest Buy
Rest Buy
Designing Rest Buy
Creating the Entities
Create EF Context and Migrations
Summary
8
Adding Features, Testing, and Deployment
Adding Features, Testing, and Deployment
Adding the Registration Feature
Creating a Unit Test
Upgrading Our Project to Bootstrap 4
Deploying RestBuy to Azure
Summary
Other Books You May Enjoy
Other Books You May Enjoy
Leave a review - let other readers know what you think
Index
Index

Client-Side Validation

There are scenarios where we don't need to go to the server to validate the input data. In the preceding example of server-side validation, we do not need to go to the server to verify whether the user has entered the data for the Name field. We can validate at the client side itself. This prevents round-trips to the server and reduces the server load.

We are going to use JavaScript to validate the data from the client side. JavaScript is a high-level, interpreted language that is primarily used in client-side programming.

Note

At present, JavaScript is also being used at the server side as part of Node.js.

Performing Client-Side Validation

Follow these steps to perform client-side validation:

  1. We are going to make a couple of changes in our ViewModel (the Index.cshtml file) to validate the form at the client side:
    1. Changes in the form: add the id attribute to all the span tags so that we can access this HTML element to display the HTML error message. On submission of the...
Previous Section
End of Section 5
Next Section