This code sets up the DbContext to use SQL Server with the provided connection string. The AppDbContext class above declares DbSet Properties for Product and Category, which correspond to tables in the database. In this Product model, the CategoryId property is a Foreign Key, and the Category property is a navigation property that references the Category class. In Entity Framework Core, models are C# classes that represent the data you will be working with.
Regularly updating to the latest EF Core version can also help avoid known issues, as updates often include bug fixes and performance improvements. When updates to an entity are not persisted, what is entity framework 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.
Trending Technologies
In the ASP.NET MVC application, the controller responds to the incoming HTTP request, then gets the data from a model and hands it over to the view. Here, in this article, we are going to discuss how to retrieve the data from the SQL Server Database using the Entity Framework Database First Approach in ASP.NET MVC Application. In our upcoming article, we will discuss using business objects as our model. As a developer, we mostly work with data-driven applications, and the ORM Framework generates the necessary SQL (to perform the CRUD operation) that the underlying database can understand.
It allows the developers to define and make new models with C# and .NET classes. In this approach, you can use empty databases and add tables too. Now your object directly works with the database to retrieve or make changes. In this article, I am going to give you a brief introduction to the Entity Framework. Before .NET 3.5 as a developer, we often used to write ADO.NET code to perform CRUD operations with the underlying database.
Basics of Entity Framework Core
The Fluent API provides more control over the EF model configuration, allowing for precise mapping of relationships. In this Entity Framework Tutorials Course using C#, I am going to discuss all the concepts of Entity Framework with Real-Time Examples. Here in this Entity Framework Tutorials article series, we will start from the very basics, and as we progress, we will cover all the intermediate and advanced features of Entity Framework as well. The framework will create the EDMX file within the Models folder. Provide the necessary details to communicate with the database such as Server name, select the Authentication Type, select the Database and click on the Ok button as shown below.
It is an enhancement to ADO.NET that gives developers an automated mechanism for accessing & storing the data in the database. Then provide a meaningful name for the connection string that is going to save in the web.config file. Here, I am naming the connection string as EmployeeDBContext and then click on the Next button as shown in the below image. Once you click on the OK button a new dialog will pop up for selecting project Templates as shown in the below image. From the below window, we are going to choose the Empty Project Template and Select MVC from Add Folders and core reference section.
Some of the commands we’ll be running in this video include dbcontext scaffold, migration add, and database update. These commands will allow us to create and execute a database migration that adds a People table, which will be accessible with our Person class. Prior to .NET 3.5, we (developers) often used to write ADO.NET code or Enterprise Data Access Block to save or retrieve https://deveducation.com/ application data from the underlying database. We used to open a connection to the database, create a DataSet to fetch or submit the data to the database, convert data from the DataSet to .NET objects or vice-versa to apply business rules. Microsoft has provided a framework called “Entity Framework” to automate all these database related activities for your application.
Before .NET Framework 3.5, as a developer, we often used to write ADO.NET Code to perform CRUD operations with the underlying database. For this, we need to create a Connection Object with the database, then Open the Connection, Create the Command Object, and execute the Command using Data Reader or Data Adapter. And then, we create DataSet or DataTables to store the data in memory to perform different types of Operations on the Data as per the business requirements.
