CRUD Operations with Entity Framework

 Entity Framework (EF) is an Object-Relational Mapping (ORM) framework developed by Microsoft for .NET applications. It enables developers to interact with a database using .NET objects, eliminating the need for most data-access code. CRUD—Create, Read, Update, and Delete—operations form the core of data handling in any application. In this blog, we’ll explore how Entity Framework simplifies CRUD operations.

Setup: What You Need

Before diving into CRUD, ensure you have:

A .NET project (Console/Web App)

A database (e.g., SQL Server)

Entity Framework Core installed via NuGet

You’ll typically create a DbContext class and POCO (Plain Old CLR Object) model classes to represent your tables.

Create Operation

To insert a new record:

using (var context = new AppDbContext())

{

    var newUser = new User { Name = "Alice", Email = "alice@example.com" };

    context.Users.Add(newUser);

    context.SaveChanges();

}

Here, EF tracks the newUser object and generates the corresponding SQL INSERT command.

Read Operation

To retrieve data:

using (var context = new AppDbContext())

{

    var users = context.Users.ToList(); // Get all users

    var user = context.Users.Find(1);   // Get user with ID = 1

}

Entity Framework translates LINQ queries into SQL SELECT statements and returns strongly typed objects.

Update Operation

To update a record:

using (var context = new AppDbContext())

{

    var user = context.Users.Find(1);

    if (user != null)

    {

        user.Email = "newemail@example.com";

        context.SaveChanges();

    }

}

EF tracks changes to the object and generates an UPDATE SQL query accordingly.

Delete Operation

To delete a record:

using (var context = new AppDbContext())

{

    var user = context.Users.Find(1);

    if (user != null)

    {

        context.Users.Remove(user);

        context.SaveChanges();

    }

}

This generates a DELETE SQL query to remove the selected record.

Conclusion

Entity Framework streamlines CRUD operations by allowing developers to interact with databases using high-level .NET code. With minimal boilerplate, EF improves code readability, maintainability, and speeds up development. Whether you're building small projects or large enterprise systems, mastering CRUD with EF is essential for modern .NET developers.

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