Controllers are rightly called the mind of an ASP.NET Core application. They course incoming requests, work out on Model data, and choose Views to be user rendered. The controllers are stored within the folder of the controller at the base of a web application. They are essentially C# classes whose Public techniques are known as Action Methods. Such action techniques manage the HTTP request and get ready with the answer to driving to the client.
A useful user interface, ASP.NET Core View, shows the model's data to the user and even allows them to change the data. They reside inside the Views folder situated based on the application. To help you out in the ASP.NET Core Web API controllers, the asp.net development company has compiled a list with examples that must keep your controller wiry for an extended time.
Data Access Logic
It is essential to know that the Asp.net controller shouldn't be used to find the data straight away. Consider the fact that not every project needs various layers. We need to keep it simple as much as possible. The more significant projects do not require the use of the data access logic. Sometimes, one data access technique turns two, after that you need to add more. To hide out the data access logic, you can make use of the repository pattern.
It is a better choice to form a separate layer, and we shouldn't use it in our controllers straight away. To find the data, you can make use of the default ASP.NET Core feature Entity Framework Core, or additional frameworks such as Dapper.
Let's say we need to process the innovative product list. It is important to calculate the cost of the product for many reasons. There we move ahead. We work successfully to turn the controller hard to keep in a long way. Not just that, but our controller has lost its drive, and it's possibly going to live the rest of its life as an unfilled purposeless husk doomed to happen in eternal agony. Satisfactory, maybe not that theatrical, but you get the opinion.
Okay, things can be better. Moreover, if you wish to see a real application of the service layer, you can find information on the Onion Architecture.
There is a big problem here. It is essential to guess it out.
There are numerous reasons why that's mistaken. We use entities to project our database and bonds. It implies we can have difficulties with validation and serialisation, and possibly getting our entities dull since we send them to the base.
To maintain the thing clean, it is essential to use DTO (Data Transfer Object). It is used to adjust the needs.
For any application, exception handling plays a significant role. But is the controller a position to do it? The quick answer will be no
ASP.NET Core makes sure to provide an excellent technique to manage exceptions globally through middleware. Merging the worldwide exclusion middleware with the exact status codes for other situations is a numerous way to keep controllers clean and avoid hostile conditions and bangs of application.
Repetitive Logic (Action Filters)
Action filters in ASP.NET MVC are an excellent method to use cross-cutting judgment at the controller level. Logging and security are the two main examples of cross-cutting logic. Security is added into a cross-cutting idea as if enabled, it can be applied for the forthcoming web application request.
ASP.NET Core is prepared with some wonderful tools to Authorize users and defend the resources appropriately. Therefore, there is no need to move ahead to create some problematic and useless mechanisms to do approval. In some cases, the attribute can perform wonders.
In the way of flexible API development, most of the essential things are to create it asynchronously from top to base. Asynchronous APIs promise a wonderful experience and that's the right way to do things. Entity Framework Core is previously equipped with async techniques to access the database, so why not begin from the top and push the async method down to the data access level?
To provide a better familiarity about the Asp.net controller, we've penned related to the asynchronous programming in .NET and a section on how to build an Asynchronous Generic Repository Model if you wish to find more in particular. In case you are interested, you can check things in a better way.
Multiple Responsibilities with One Controller
An asp.net controller can finish different things straightforwardly. The product controller should be accountable for the product-linked stuff. Do you need to know how a statement will process? Yes. The new controller will get formed according to your needs.
Simply not that, in case your route turns complicated or lengthy, you can indeed create some controller to make the API helpful for the users.