In the next article, I am going to discuss how to create Hyperlink in ASP.NET MVC application. The following is the default folder structure of the ASP.NET Core ASP.NET MVC application. If you have checked it, then the solution file (.sln) and project files will be saved in the same folder.

Choose the target framework .NET 6, which is the latest, or you can choose based on your requirements. Skip the other details for ease of understanding, as shown in the following image. When updates to an entity are not persisted, verify that SaveChanges() is being called and that no exceptions are being swallowed. This reduces overhead when the entities returned will not be updated in the current context. To optimize performance, use AsNoTracking for read-only queries to skip change tracking.

Step 3: Set up DbContext

Now, Choose the minimum details for ease of understanding, as shown in the following image. Migration errors often occur due to discrepancies between the database and the model state. Entity Framework Core offers Advanced Features that can optimize data access and model advantages of entity framework configuration. Migrations are a powerful feature that allows developers to Evolve Their Database without losing data or compromising the integrity of their application. This reverts the database to the state it was in after the specified migration was applied.

• In this Product model, the CategoryId property is a Foreign Key, and the Category property is a navigation property that references the Category class.
• Some of the commands we’ll be running in this video include dbcontext scaffold, migration add, and database update.
• Provide a meaningful namespace to your EDMX file and finally click on the Finish button as shown in the below image.
• Whenever you make a change to one of your entity classes, EF Core can generate a migration to update the schema.

An ORM framework does this object to SQL mapping by generating SQL statements and the Entity manager will execute them when you need to save or load objects from the database. It comes at the cost of another abstraction layer, but it will make the code easier to write. Most of the time you don’t have to write any SQL yourself, and iterating is very easy using your language built in functions. When you make any changes to the object, the ORM will usually detect this, and mark the object as ‘modified’.

Update Problems

Now we have to add Entity so here I am going to use database first approach when we have an already-existing database then we will prefer the database first approach. So for this right click our solution explorer and go add and select data in left panel and then select ADO.Net Entity Data Model. It will create the DBContext class for us whose name is the same as the name of the connection string that is EmployeeDBContext. The EmployeeDBContext class derives from the DbContext class and is responsible for establishing a connection to the database. The  EmployeeDataModel.Context.cs which is inside EmployeedataModel.Context.tt as sown below.

This is the first article dealing with .Net MVC, Code-First approach. At the end, we will have an MVC app that can consume a database directly through entity framework. We can see the initials created by this command inside the migration folder for the project. We need to create the scaffolding so as to display it on the web page. Save the file first and run both the commands now from the package manager console.

Creating A New Project With Entity Framework

Entity Framework Core has trade-offs of performance overhead and increased memory usage compared to more tedious approaches like ADO.NET. Most developers are willing to make those trade-offs for increased developer productivity, a high-level database access abstraction, and unit testing options. Run the application and notice that Departments and Employees data are displayed as expected as shown in the below image. We have achieved all this without writing a single line of ADO.NET code. If this is not clear at this moment how it works, don’t worry we will discuss everything in detail in our upcoming articles. After opening the console application, Entity framework is not installed by default.

Here, I am naming the connection string as EmployeeDBContext and then click on the Next button as shown in the below image. From the New Project window as shown in the below image, expand the Visual C# node and select Web from the left pane. Provide a meaningful name to your project such as CRUD_OperationsInMVC. https://deveducation.com/ Select the location where you want to create the project by clicking on the Browse button. You can run the application with default contents or let open the Index.cshtml file and put some contents there. Now press F5 on the keyboard or use the run option from Visual Studio to run the application in the browser.

Here I am going to use Entity Framework 6.x, so I am selecting the Entity Framework 6.x radio button and click on the Next button as shown in the below image. In the next step, click on the new connection From Choose your data connection wizard as shown below. I hope from the preceding step-by-step demonstration, you have learned how to create the ASP.NET Core MVC Web Application. It’s important to note that while this is a common structure, it’s not set in stone, and you can adapt it to fit the specific requirements of your project. ASP.NET Core is flexible in this regard, allowing you to organize your code as you see fit while following best practices for maintainability and scalability.

Now, run the application and you will get the output as expected as shown in the below image. Let us first see the example without using Entity Framework and then we will see the same example using Entity Framework. In the below example, we are using ADO.NET to interact with the database to fetch the data and display it in the console. In code, you might want to work with objects in an object oriented fashion.