Look how the Authorize attribute is present here to be sure that the front end has logged in and how dependency injection works in the constructor of the class. Welcome to the first step of our Web API Core 2 application. The first thing we need is to create an ASP.Net Core Web Application, which we will call SeedAPI.Web.API.

• Here, if the user is authenticated, it will show the menu and header sections, but if not, the layout will change to show just our login page.
• Now click on small tree node of .cshtml file, you can see another file which has extension .cshtml.cs file similar to aspx and aspx.cs in asp.net.
• The degree of adherence to the components within the software and the cohesion within the components are two important concepts for the SoC principle.
• In the same way, Razor Pages are added conventionally to the Pages folder.

While developing the software, the concepts we can call an boundaries “may be the clearest words that distinguish these responsibilities from one another. From the simplest, we distinguish between the concepts of layer and tier and certain responsibilities. If we enter a little more, the namespaces of our software components can also be used as limits to allocate responsibilities.

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If you are using ASP.NET Core 3.1 Razor Lessons, you have to add the above Syncfusion.Blazor.Themes static web assets reference in the application. Or else, you have to add the above Syncfusion.Blazor styles reference for overall NuGet package. Select the target Framework .NET 6 at the top of the Application based on your required target that you want and then click the Create button to create a new Razor Class Library application. Now that the Countries and Regions repositories are available through dependency injection you can add use them in CustomersRepository rather than instantiating them using their concrete classes. You can see a specific example of class coupling in the PageModel for the Create page. As you proceed with addressing this issue you’ll also be able to see how using the .NET dependency injection middleware helps implement inversion of control.

When the OnGet() action method for the page requires a list of customers it just calls the appropriate method on the available instance of the repo that’s available for the class. The additional three lines add the repositories to the services dependency injection service collection. They’re now available to be included in other classes through dependency injection rather than direct invocation. In the list of using directives you can see that the classes in this file rely on both the RazorDrop.Data and RazorDrop.ViewModels namespaces. The first provides both the data context, RazorDropContext and the data repositories. Open the appsettings.json file in the RazorDrop project root and update the connection string set in the RazorDropContext element to point to the correct database server.

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After storage, we want to redirect the page to the OnGet handler of our page. Redirecting is an essential part of web development, as it avoids the additional POST requests when we refresh a URL in our browser session. Page Services provide to support Razor pages in order to implement screen logics.

Now, import and add the Syncfusion Blazor components in the ~/Component.razor file. For example, the Calendar component is imported and added in the ~/Component.razor page. The Syncfusion Blazor Calendars package will be included in the newly created project once the installation process is completed. Get in touch with him if you’d like to contribute your own post on the Twilio blog to help other developers build better .NET Core software. If you need help debugging, the completed source code for this post is available in the uncoupling branch of the companion repository on GitHub.