Rowan Miller — новинки

The DbContext API captures Entity Framework’s (EF) most commonly used features and tasks, simplifying development with EF. This concise book shows you how to use the API to perform set operations with the DbSet class, handle change tracking and resolve concurrency conflicts with the Change Tracker API, and validate changes to your data with the Validation API.

With DbContext, you’ll be able to query and update data, whether you’re working with individual objects or graphs of objects and their related data. You’ll find numerous C# code samples to help you get started. All you need is experience with Visual Studio and database management basics.

• Use EF’s query capabilities to retrieve data, and use LINQ to sort and filter data
• Learn how to add new data, and change and delete existing data
• Use the Change Tracker API to access information EF keeps about the state of entity instances
• Control change tracking information of entities in disconnected scenarios, including NTier applications
• Validate data changes before they’re sent to the database, and set up validation rules
• Bypass EF’s query pipeline and interact directly with the database

Take advantage of the Code First data modeling approach in ADO.NET Entity Framework, and learn how to build and configure a model based on existing classes in your business domain. With this concise book, you’ll work hands-on with examples to learn how Code First can create an in-memory model and database by default, and how you can exert more control over the model through further configuration.

Code First provides an alternative to the database first and model first approaches to the Entity Data Model. Learn the benefits of defining your model with code, whether you’re working with an existing database or building one from scratch. If you work with Visual Studio and understand database management basics, this book is for you.

Learn exactly what Code First does—and does not—enable you to do
* Understand how property attributes, relationships, and database mappings are inferred from your classes by Code First
* Use Data Annotations and the Fluent API to configure the Code First data model
* Perform advanced techniques, such as controlling the database schema and overriding the default model caching

This book is a continuation of author Julia Lerman’s Programming Entity Framework, widely recognized as the leading book on the topic.