ASP.NET Core

ASP.NET Core is the new version of the ASP.NET web framework mainly targeted to run on .NET Core platform.

ASP.NET Core is a cross-platform, high-performance, open-source framework for building modern, cloud-enabled, Internet-connected apps. With ASP.NET Core, you can: Build web apps and services, Internet of Things (IoT) apps, and mobile backends. Use your favorite development tools on Windows, macOS, and Linux.

ASP.NET Core is a cross-platform, high-performance, open-source framework for building modern, cloud-enabled, Internet-connected apps. With ASP.NET Core, you can: Build web apps and services, Internet of Things (IoT) apps, and mobile backends. Use your favorite development tools on Windows, macOS, and Linux.

ASP.NET Core is a cross-platform, high-performance, open-source framework for building modern, cloud-enabled, Internet-connected apps. With ASP.NET Core, you can: Build web apps and services, Internet of Things (IoT) apps, and mobile backends. Use your favorite development tools on Windows, macOS, and Linux.

ASP.NET Core is a cross-platform, high-performance, open-source framework for building modern, cloud-enabled, Internet-connected apps. With ASP.NET Core, you can: Build web apps and services, Internet of Things (IoT) apps, and mobile backends. Use your favorite development tools on Windows, macOS, and Linux.

The Main() method is an entry point of console and windows applications on the . NET or . NET Core platform. It is also an entry of ASP.NET Core web applications.

In-process hosting runs an ASP.NET Core app in the same process as its IIS worker process. In-process hosting provides improved performance over out-of-process hosting because requests arent proxied over the loopback adapter, a network interface that returns outgoing network traffic back to the same machine.

Kestrel is a cross-platform web server for ASP.NET Core. Kestrel is the web server thats included by default in ASP.NET Core project templates. Kestrel supports the following scenarios: HTTPS. Opaque upgrade used to enable WebSockets.

The Model-View-Controller (MVC) is an architectural pattern that separates an application into three main logical components: the model, the view, and the controller. Each of these components are built to handle specific development aspects of an application.

In this Video, I am going to discuss How to Set up MVC in ASP.NET Core Application step by step. Please watch our previous Video before proceeding to this Video where we discussed the Basics of ASP.NET Core MVC Application.

AddMvcCore() , as the name implies, only adds core components of the MVC pipeline, requiring you to add any other middleware (needed for your project) by yourself. AddMvc() internally calls AddMvcCore() and adds other middleware such as the Razor view engine, Razor pages, CORS, etc

The model classes represents domain-specific data and business logic in the MVC application. It represents the shape of the data as public properties and business logic as methods. In the ASP.NET MVC Application, all the Model classes must be created in the Model folder.

ASP.NET Core supports the dependency injection (DI) software design pattern, which is a technique for achieving Inversion of Control (IoC) between classes and their dependencies. For more information specific to dependency injection within MVC controllers, see Dependency injection into controllers in ASP.NET Core.

Controllers are the brain of an ASP.NET Core application.They are basically C# classes whose Public methods are called as Action Methods. These Action Methods handle the HTTP requests and prepare the response to be sent to the clients

A view is used to display data using the model class object. The Views folder contains all the view files in the ASP.NET MVC application. A controller can have one or more action methods, and each action method can return a different view. In short, a controller can render one or more views.

In the Create a new project window, select C# from the Language list. Next, select Windows from the platform list, and Web from the project types list. After you apply the language, platform, and project type filters, select the ASP.NET Core Web App template, and then select Next.

In MVC, when we want to transfer the data from the controller to view, we use ViewData. It is a dictionary type that stores the data internally. ViewData contains key-value pairs which means each key must be a string in a dictionary. The only limitation of ViewData is, it can transfer data from controller to view.

ViewData and ViewBag are used for the same purpose -- to transfer data from controller to view. ViewData is nothing but a dictionary of objects and it is accessible by string as key. ViewData is a property of controller that exposes an instance of the ViewDataDictionary class. ViewBag is very similar to ViewData

The view which binds to a specific type of ViewModel is called as Strongly Typed View. By specifying the model, the Visual studio provides the intellisense and compile time checking of type. We learnt how to pass data from Controller to View in this tutorial.

we can say that a ViewModel in ASP.NET Core MVC is a model that contains more than one model data required for a particular view. Combining multiple model objects into a single view model object provides us better optimization.

Routing is responsible for matching incoming HTTP requests and dispatching those requests to the app's executable endpoints. Endpoints are the app's units of executable request-handling code. Endpoints are defined in the app and configured when the app starts.

A custom route constraint can also be used with a Convention based routing. The new version MVC has an override version MapRoute method that accepts a constraint as a parameter. Using this method we can pass over a custom constraint.

Attribute routing in ASP.NET Core 3.0 allows us to define specific, customized routes for actions in our systems. Said routes are applied directly at the controller action level, allowing for high cohesion between route and action.

In ASP.NET Core, the Route Attribute support token replacement. It means we can enclose the token (i.e. controller and action) within a pair of square-braces ([ ]). The tokens (i.e. [controller] and [action]) are then replaced with the values of controller and action method name where the route is defined.

ASP.NET MVC introduced a Layout view which contains these common UI portions so that we don't have to write the same code in every page. The layout view is the same as the master page of the ASP.NET webform application.

The ASP.NET Core allows you to create custom sections in the layout pages. The Custom Section expects a name of the section and whether the section is required. The RenderSection(string name, bool required:false) method defines the named section.

It's a special file in ASP.NET Core MVC. The code in this file is executed before the code in an individual view is executed. Instead of setting the Layout property in each individual view, we can move that code into the _ViewStart.

The ViewImports File. The purpose of the _ViewImports. cshtml file is to provide a mechanism to centralise directives that apply to Razor pages so that you don't have to add them to pages individually. The default Razor Pages template includes a _ViewImports.

The recommended way to install client-side dependencies like Bootstrap in ASP.NET Core is via Bower (using bower. json , as shown above). The use of npm/NuGet are shown to demonstrate how easily Bootstrap can be added to other kinds of web applications, including earlier versions of ASP.NET.

The recommended way to install client-side dependencies like Bootstrap in ASP.NET Core is via Bower (using bower. json , as shown above). The use of npm/NuGet are shown to demonstrate how easily Bootstrap can be added to other kinds of web applications, including earlier versions of ASP.NET.

A Tag Helper Component is a Tag Helper that allows you to conditionally modify or add HTML elements from server-side code. This feature is available in ASP.NET Core 2.0 or later. ASP.NET Core includes two built-in Tag Helper Components: head and body . They're located in the Microsoft. AspNetCore.

The Image Tag Helper enhances the tag to provide cache-busting behavior for static image files. A cache-busting string is a unique value representing the hash of the static image file appended to the asset's URL.

The Environment Tag Helper is applied on HTML tag. It determines the current value of ASPNETCORE_ENVIRONMENT environment variable and renders the content based on the value. The Value of the ASPNETCORE_ENVIRONMENT is available in the IHostingEnvironment.

The ASP.NET Core Menu Bar is a graphical user interface control that serves as a navigation header for your web application or site. It supports data binding, templates, icons, multilevel nesting, and horizontal and vertical menus.

Generates a hidden Request Verification Token to prevent cross-site request forgery (when used with the [ValidateAntiForgeryToken] attribute in the HTTP Post action method) Provides the asp-route- attribute, where is added to the route values.

The Model Binding is a mechanism in ASP.NET Core Application that extracts the data from an HTTP request and provides them to the controller action method parameters. The action method parameters may be simple types like integers, strings, etc., or complex types such as Student, Order, Product, etc.

In this Video, I am going to give you an overview of Entity Framework Core. The Entity Framework Core which is also known as EF Core is the latest version of Entity Framework and completely rewrites from the ground up. As part of this Video, we are going to discuss the following pointers.

In this Video, I am going to discuss How to Install Entity Framework Core in Visual Studio step by step in different types of applications. Please watch our previous Video where we discussed the introduction part of Entity Framework Core.

In this Video, I am going to discuss DbContext in Entity Framework Core in detail. Please watch our previous Video where we discussed how to install entity framework core in visual studio step by step. DbContext class is one of the important classes in entity framework core and at the end of this Video, you will understand the significance of the DbContext class in Entity Framework Core. As part of this, we will discuss the following pointers.

In InProcess hosting model, the ASP.NET Core application is hosted inside of the IIS Worker Process i.e. w3wp.exe. In OutOfProcess hosting model, Web Requests are forwarded to the ASP.NET Core app running on the Kestrel Server.

The launchSettings. json file is used to store the configuration information, which describes how to start the ASP.NET Core application, using Visual Studio. The file is used only during the development of the application using Visual Studio. It contains only those settings that required to run the application.

The Startup class configures your applications services and defines the middleware pipeline. Generally speaking, the Program class is where you configure your applications infrastructure, such as the HTTP server, integration with IIS, and configuration sources.

The appsettings. json file is an application configuration file used to store configuration settings such as database connections strings, any application scope global variables, etc. If you open the ASP.NET Core appsettings.

Middleware in ASP.NET Core controls how our application responds to HTTP requests. It can also control how our application looks when there is an error, and it is a key piece in how we authenticate and authorize a user to perform specific actions.

The ASP.NET Core request pipeline consists of a sequence of request delegates, called one after the other. The following diagram demonstrates the concept. The thwatch of execution follows the black arrows. Each delegate can perform operations before and after the next delegate

In order to add the wwwroot folder, right-click on the project and then select add => new folder option and then provide the folder name as wwwroot

To serve static files from an ASP.NET Core app, you must configure static files middleware. With static files middleware configured, an ASP.NET Core app will serve all files located in a certain folder (typically /wwwroot)

In this Video, I am going to discuss Configuring Default Page in ASP.NET Core Application. Please watch our previous Video where we discussed How to Configure Static Files Middleware in ASP.NET Core application to serve the static files such as Image, CSS, JavaScript, etc.

The Developer Exception Page middleware provides developer-friendly error messages when an exception is thrown in the application. This information helps you to trace the errors that occur when the application is running in the Development environment.

.NET Core command-line interface (CLI) is a new cross-platform tool for creating, restoring packages, building, running and publishing . NET applications. We created our first ASP.NET Core application using Visual Studio in the previous chapter.