Category: Entity Framework Core

[quads id=RndAds] [quads id=RndAds] Migration in Entity Framework Core In this tutorial we are going to se how to do migration in entity framework core.One of the key features of Entity Framework is its ability to automatically migrate data model changes to the database schema. This process is called "database migration".[ez-toc] How migration works You make changes to your data model (e.g. add a new entity, rename a property, etc.).You use the EF Package Manager Console (PMC) or the dotnet EF command-line tool to create a migration based on these changes.The EF generates code that represents the changes you made to the data model and stores it in a migration file.You apply the migration to the database using the EF PMC or the dotnet EF tool. This will update the…

[quads id=RndAds] [quads id=RndAds] Entity Framework Core SaveChanges | Save DataIn this entity framework core tutorial will discuss to save data using entity framework core savechanges method and it will includes insert, update and delete operations.Entity Framework Core provides different ways to add, update, or delete data in the database for that we need to use entity framework core savechanges method. An entity contains data in its scalar property will be either inserted or updated or deleted based on its EntityState.Step 1: Create interface ‘IStudentContract.cs’.public interface IStudentContract { Student GetStudent(int id); List GetAllStudent(); List GetAllStudentByName(string name); void Add(Student student); void Update(Student student); void Delete(int studentID); }Step 2: Create service ‘StudentService.cs’ which impments the above contract.public class StudentService : IStudentContract { public List GetAllStudent() { var context = new SchoolContext(); List students =…

[quads id=RndAds] Entity Framework Core Query to Database.In this tutorial will discuss to write queries into entity framework core and below point and querying entity framework core.Entity Framework Core uses Language Integrated Query (LINQ) to query data from the database.LINQ allows you to use C# (or your .NET language of choice) to write strongly typed queries based on your derived context and entity classes.Querying in Entity Framework Core remains the same as in EF 6 to load entities from the database.It provides more optimized SQL queries and the ability to include C#/VB.NET functions into LINQ-to-Entities queries.Step 1: Create interface 'IStudentContract.cs'.public interface IStudentContract { Student GetStudent(int id); List GetAllStudent(); List GetAllStudentByName(string name); }Step 2: Create service 'StudentService.cs' which impments the above contract.public class StudentService : IStudentContract { public List GetAllStudent() { throw…

[quads id=RndAds] Database First Approach.In this tutorial will see how to create model from database in entity framework core and will see implementation database first approach in entity framework core.The Database First Approach creates the entity framework from an existing database. We use all other functionalities, such as the model/database sync and the code generation, in the same way we used them in the Model First approach.The Database First Approach provides an alternative to the Code First and Model First approaches to the Entity Data Model. It creates model codes (classes, properties, DbContext etc.) from the database in the project and those classes become the link between the database and controller.So lets create database and table require.We have a simple database created in the previous article, and it contains two…

[quads id=RndAds] Code First ApproachIn this tutorial we discuss what code first approach in entity framework core and generate database from out domain entity.Entity Framework introduced the Code-First approach with Entity Framework 4.1. Code-First is mainly useful in Domain Driven Design. In the Code-First approach, we will focus on the domain of your application and start creating classes for your domain entity rather than design your database first and then create the classes which match your database design.We will create Entities, which are regular C# classes with DB attributes. Entities are not “DTO” objects because it's designed for Database interactions. We will be using the code-first approach, so these Entity classes are inputs for DB creation.Step 1: Let create folder with name entity in our project into root directory and…

[quads id=RndAds] Installing Entity Framework CoreIn this video we will see step by step installation of entity framework into application.Depending on our requirement we set up the project.  For example if your application isSingle Layer Web ApplicationIf it's a small project, you may have your presentation layer, business layer and data access layer all in one project. These means we can install the entity framework to our web application it selfMulti Layer Web ApplicationIn a large application we will usually have at least the following 3 layersPresentation LayerBusiness Logic LayerData Access LayerThese layers are implemented as separate projects. Entity Framework Core is usually required in the Data Access Layer project. The Data Access Layer project is a class library project and does not usually have the meta package referenced.Packages RequiredMicrosoft.EntityFrameworkCore.SqlServer: This…

[quads id=RndAds] Introduction to Entity Framework CoreIn this tutorial will discuss about entity framework overview and will understand below points.What is EF CoreEntity Framework Core, also called EF Core is a complete rewrite from the ground up. If you have any experience with previous versions of Entity Framework, you will find lot of familiar features. EF Core is an ORM (Object-Relational Mapper). EF core is lightweight, extensible, and open source software. Like .NET Core, EF Core is also cross platform. It works on windows, Mac OS, and Linux. EF core is Microsoft’s official data access platform.What is ORMORM stands for Object-Relational Mapper and it enables developers to work with a database using business objects. As a developer we work with the application business objects and the ORM generates the SQL that…