ASP .NET Core MVC with EF And C#

Reference Website

https://www.tutorialsteacher.com/

Run console application c# .net6 using ctrl+f5

Compile the application using ctrl+shift+b

What is EF (Entity Framework)?

Entity Framework is a new latest technology provided by ODO.net for accessing database.

It is an ORM tool (Object Relation Mapping).

IT provides easy and automated way of mapping between objects(Classes) and Relations (Tables).

It auto generates most of the data-access code.

Why use ORM?

It provides full intellisense support for columns names and table names.(Strongly typed).

What is asp.net core?

Cross Platform, High Performance, Open source framework for building modern, cloud based, internet connected applications.

1. 1.Cross platform
2. 2.Ability to install the features that are needed for the application
3. 3.A complete rewrite of ASP.NET (goal>>cross platform, open source)
4. 4.Dependency injection system

Advantages:

1. 1.Open Source
2. 2.Cross Platform
3. 3.Easy integration with client side libraries some of these libraries like react, angular, vue.js
4. 4.Lightweight and high performance
5. 5.Cloud-ready
6. 6.Apis on par with the .NET Framework

App Difference:

 #Variables/ Constant:

• variable is a name given to a storage location in memory, where we can store a value

Ex:

int number;

int Number = 1;

      Constant: an immutable value that is a value we cannot change dynamically.

• Constant is used to safety in our application that involves some mathematical calculations.

Ex:

const float Pi = 3.14f;

#Identifiers:

• cannot start with a number

Ex:

oneRoute

1route*

• cannot include whitespace, it has to be one word.

firstName

first name*

• Cannot be a reserved keyword

@int

int*

Use meaningful names:

firstName

Naming Conventions:

1)camel case: firstName

2)Pascal Case: FirstName

3)Hungarian notation”strFirstName ->not use in c#

For local variables: camel case: int number;

For Constant: Pascal case: const int MaxZoom = 5;

Primitive types:

1)integral numbers

          byte

          short

          int

          long

2)real numbers

          float

          decimal

          double

3)character

          char

4)boolean

          bool

overflowing:

          byte number = 255;

          number = number + 1;  output -> //0

MVC Architecture separates the three main components

MVC (Model - View - Controller)

Model :- Application Data and behaviour in terms of its problem domain and independent of the UI. Model represents the data, does nothing else. The model is independent of the controller or view.

View :- The HTML markup that we display to the user. View are the components that displays the application’s user interface (UI). Typically this UI is created from the model data.

Controller :- Controllers are the components that handle user interaction (HTTPRequest). Controller works with the model, and ultimately select a view that displays UI Responsible for handling an HTTP request.

MVC architectural pattern

Model -> View -> Controller -> Router

Router :- Select the right controller to handle the request.

Url Pattern In MVC

The url pattern only considered only after domain name part in the URL

Ex: localhost:1234/{Controller}/{action}/{id}

      localhost:1234/Book/Index/2