Introduction to NET Florin Olariu Alexandru Ioan Cuza

Agenda Short recap about MVC Understanding MVC Routing Model binding Model validation Dependency injection

Short recap about MVC Models and their responsibilities

Short recap about MVC Models and their responsibilities The Model in an MVC application

Short recap about MVC Views and their responsibilities

Short recap about MVC Views and their responsibilities Used for presenting content through the

Short recap about MVC Controllers and their responsibilities

Short recap about MVC Controllers and their responsibilities Handles user interaction, work with model

Routing routes. Map. Route(name: "Default", template: "{controller=Home}/ {action=Index}/{id? }");

Model binding @model My. Model. Name <form asp-controller="Product" asp-action="Edit" method ="post" > <label asp-for="Name"></label

Model binding @model My. Model. Name [Http. Post] public IAction. Result My. Action(My. Model.

Model validation using System. Component. Model. Data. Annotations; public class My. Model. View. Model

Model validation public IAction. Result My. Action(My. Model. View. Model model) { if (Model.

Dependency Injection @inject Some. Service. Name <!DOCTYPE html> <head> <title>@Service. Name. Get. Title</title> </head>

Filters using Filters. Sample. Helper; using Microsoft. Asp. Net. Core. Mvc. Filters; namespace Filters.

Filters [Authorize] public class Account. Controller : Controller { }

Razor View Engine What is Razor? Rendering HTML

Razor View Engine What is Razor? Rendering HTML <p>Hello World</p>

Razor View Engine What is Razor? Rendering HTML Razor syntax <p>@Date. Time. Now</p>

Bringing all together DEMO ~ 40 minutes Building an MVC Core application from scratch

One more thing…(2/2) Postel’s Law: “Be conservative in what you do, be liberal in

Summary Models Views Controllers Razor Filters Validations

Bibliography https: //docs. asp. net/en/latest/tutorials/first-web-api. html - By Mike Wasson and Rick Anderson Nagel,

Questions Do you have any other questions?

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Introduction to. NET Florin Olariu “Alexandru Ioan Cuza”, University of Iași Department of Computer Science

ASP. NET Core MVC

Agenda Short recap about MVC Understanding MVC Routing Model binding Model validation Dependency injection Filters Razor View Engine Bringing all together Summary

Short recap about MVC

Short recap about MVC Models and their responsibilities

Short recap about MVC Models and their responsibilities The Model in an MVC application represents the state of the application

Short recap about MVC Models and their responsibilities The Model in an MVC application represents the state of the application Business logic or operations that should be performed by models

Short recap about MVC Models and their responsibilities The Model in an MVC application represents the state of the application Business logic or operations that should be performed by models Strongly-typed views will typically use View. Model types specifically designed to contain the data to display on that view

Short recap about MVC Views and their responsibilities

Short recap about MVC Views and their responsibilities Used for presenting content through the user interface

Short recap about MVC Views and their responsibilities Used for presenting content through the user interface They use the Razor view engine to embed. NET code in HTML markup.

Short recap about MVC Views and their responsibilities Used for presenting content through the user interface. They use the Razor view engine to embed. NET code in HTML markup. If we need to deal with logic and display complex data we should consider using View. Component, View. Model or View template

Short recap about MVC Controllers and their responsibilities

Short recap about MVC Controllers and their responsibilities Handles user interaction, work with model and than select a view that will be rendered

Routing

Routing routes. Map. Route(name: "Default", template: "{controller=Home}/ {action=Index}/{id? }");

Routing Attribute routing

Model binding

Model binding @model My. Model. Name

Model binding @model My. Model. Name <form asp-controller="Product" asp-action="Edit" method ="post" > <label asp-for="Name"></label > <input asp-for="Name"/> <label asp-for="Description"></label > <input asp-for="Description"/> <input type="submit" value="Submit" /> </form>

Model binding @model My. Model. Name [Http. Post] public IAction. Result My. Action(My. Model. Name model) { return View(model); }

Model validation

Model validation using System. Component. Model. Data. Annotations; public class My. Model. View. Model { [Required] public string Name { get; set; } [Required] public string Description { get; set; } }

Model validation public IAction. Result My. Action(My. Model. View. Model model) { if (Model. State. Is. Valid) { // work with the model } // If we got this far, something failed, redisplay form return View(model); }

Dependency Injection

Dependency Injection @inject Some. Service. Name <!DOCTYPE html> <head> <title>@Service. Name. Get. Title</title> </head> <body> <h 1>@Service. Name. Get. Title</h 1> </body> </html>

Filters

Filters using Filters. Sample. Helper; using Microsoft. Asp. Net. Core. Mvc. Filters; namespace Filters. Sample. Filters { public class Sample. Action. Filter : IAction. Filter { public void On. Action. Executing(Action. Executing. Context context) { // do something before the action executes } public void On. Action. Executed(Action. Executed. Context context) // do something after the action executes } } } {

Filters [Authorize] public class Account. Controller : Controller { }

Razor View Engine

Razor View Engine What is Razor?

Razor View Engine What is Razor? Rendering HTML

Razor View Engine What is Razor? Rendering HTML <p>Hello World</p>

Razor View Engine What is Razor? Rendering HTML Razor syntax <p>@Date. Time. Now</p>

Razor View Engine What is Razor? Rendering HTML Razor syntax <p>@Date. Time. Now</p> @{ var joe = new Person("Joe", 33); } <p>Age@(joe. Age)</p> @for (var i = 0; i < people. Length; i++) { var person = people[i]; @: Name: @person. Name }

Bringing all together DEMO ~ 40 minutes Building an MVC Core application from scratch Scaffolding, validation, and model binding We will create a movie with the entire flow and explanations

One more thing…(1/2)

One more thing…(2/2) Postel’s Law: “Be conservative in what you do, be liberal in what you accept from others. ”

Summary Models Views Controllers Razor Filters Validations

Bibliography https: //docs. asp. net/en/latest/tutorials/first-web-api. html - By Mike Wasson and Rick Anderson Nagel, Christian. Professional C# 6 and. NET Core 1. 0 Chowdhuri, Shahed. ASP. NET Core Essentials https: //docs. microsoft. com/en-us/aspnet/core/mvc/overview http: //deviq. com/kinds-of-models/

Questions Do you have any other questions?

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