Ef code first
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The document discusses how the Entity Framework (EF) Code First model works. It describes how to define simple entities connected by IDs, add virtual properties for lazy loading, and preserve naming conventions. It also covers creating a DbContext, repositories, and using it similarly to a general EF model. By default, the database server is SQL Express and the database name can be changed via the connection string. Database initializers are used to initialize the database if it does not exist. Data annotations can configure the database structure.
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ADO.NET is Microsoft's data access technology for .NET applications to connect to data sources. It uses a multilayered architecture centered around connections, commands, and dataset objects. Key differences from ADO include using a generic set of objects regardless of data source and a data provider model. ADO.NET supports features like interoperability, maintainability, typed programming, and performance through its disconnected data architecture.
ADO.NET by ASP.NET Development Company in india
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ADO.NET is a data access technology from the Microsoft .NET Framework that provides communication between relational and non-relational systems through a common set of components.
Video :
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http://www.ifourtechnolab.com
Data access
Data access patterns and technologies are discussed. The Data Access Object (DAO) pattern separates data access from business logic. Spring JDBC and myBatis provide APIs for SQL queries and object mapping. Object-relational mapping (ORM) tools like Hibernate reduce code by mapping objects to relational databases but can reduce performance. JDBC template provides basic data access while frameworks offer additional features.
Murach: How to use Entity Framework EF Core
How to use Entity Framework EF Core
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Ef code first
- 2. Code First Model 1. Define Simple Entities with connection by ID
- 3. 2. Add virtual properties for lazy loading of Aggregated Fields EF lazy loading is enabled by default Code First Model
- 4. 3. Remember to preserve name convention EF Code First uses general agreement about names. Code First Model
- 5. 4. Create Data Context DbContext is similar to EF general Data Context Code First Model
- 6. Code First Model 5. Create a Repositories
- 7. 6. What about usage? You can work with it same like a general EF Model Code First Model
- 8. 7. And what is the result? Code First Model
- 9. Code First Model 9. Where is Database? Default DB Server is .qlExpress
- 12. Code First Model Database Initializers System.Data.Entity.Database .IDatabaseInitializer <in TContext> CreateDatabaseIfNotExists DropCreateDatabaseIfModelChanges DropCreateDatabaseAlways
- 13. Code First Model 1. Create Initializer
- 14. Code First Model 2 . Register Initializer
- 15. Code First Model 3 . And we have data if no db is created
- 18. And Validation Attributes are now also supported Code First Model
- 19. And using some MVC Magic we receive Code First Model
- 20. Questions? :)