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Programming Entity framework. Dbcontext /
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 Trac...
| Clasificación: | Libro Electrónico |
|---|---|
| Autor principal: | |
| Otros Autores: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Sebastopol, CA :
O'Reilly Media,
©2012.
|
| Edición: | 1st ed. |
| Temas: | |
| Acceso en línea: | Texto completo (Requiere registro previo con correo institucional) |
MARC
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| 245 | 1 | 0 | |a Programming Entity framework. |p Dbcontext / |c Julia Lerman and Rowan Miller. |
| 246 | 3 | 0 | |a Dbcontext |
| 250 | |a 1st ed. | ||
| 260 | |a Sebastopol, CA : |b O'Reilly Media, |c ©2012. | ||
| 300 | |a 1 online resource (xiv, 238 pages) : |b illustrations | ||
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| 520 | |a 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. | ||
| 542 | |f Copyright © O'Reilly Media, Inc. |g 2012. | ||
| 505 | 0 | |a Table of Contents; Preface; Audience; Contents of This Book; Conventions Used in This Book; Using Code Examples; Safari® Books Online; How to Contact Us; Acknowledgments; Chapter 1. Introducing the DbContext API; Getting the DbContext API into Your Project; Looking at Some Highlights of the DbContext API; Reducing and Simplifying Ways to Work with a Set; Retrieving an Entity Using ID with DbSet.Find; Avoiding Trolling Around the Guts of Entity Framework; Working with the BreakAway Model; Getting the Sample Solution; Getting DbContext from an EDMX Model | |
| 505 | 8 | |a Ensuring DbContext Instances Get DisposedChapter 2. Querying with DbContext; Writing Queries with LINQ to Entities; Querying All the Data from a Set; Using LINQ for Sorting, Filtering, and More; Finding a Single Object; Querying Local Data; Using the Load Method to Bring Data into Memory; Running LINQ Queries Against Local; Working with the ObservableCollection Returned by Local; Loading Related Data; Lazy Loading; Understanding the downsides of lazy loading; Eager Loading; Understanding the downsides of eager loading; Using Include in LINQ queries; Explicit Loading | |
| 505 | 8 | |a Checking If a Navigation Property Has Been LoadedQuerying Contents of a Collection Navigation Property; Explicit Loading a Subset of the Contents of a Navigation Property; Chapter 3. Adding, Changing, and Deleting Entities; Working with Single Entities; Adding New Entities; Changing Existing Entities; Deleting Existing Entities; Deleting without loading from the database; Deleting an object with related data; Multiple Changes at Once; The "Find or Add" Pattern; Working with Relationships; Adding a Relationship Between Objects; Changing a Relationship Between Objects | |
| 505 | 8 | |a Removing a Relationship Between ObjectsWorking with Change Tracking; Using Snapshot Change Tracking; Understanding When Automatic Change Detection Occurs; Controlling When DetectChanges Is Called; Using DetectChanges to Trigger Relationship Fix-up; Enabling and Working with Change Tracking Proxies; Ensuring the New Instances Get Proxies; Creating Proxy Instances for Derived Types; Fetching Entities Without Change Tracking; Chapter 4. Working with Disconnected Entities Including N-Tier Applications; A Simple Operation on a Disconnected Graph; Exploring the Challenges of N-Tier | |
| 505 | 8 | |a Using Existing N-Tier Frameworks That Support Graph ModificationUsing Explicit Operations on the Server Side; Replaying Changes on the Server; Understanding How DbContext Responds to Setting the State of a Single Entity; Marking a New Entity as Added; Marking an Existing Entity as Unchanged; Marking an Existing Entity as Modified; Registering an Existing Entity for Deletion; Using a stub entity to mark for deletion; Working with Relationships with and Without Foreign Keys; Benefiting from foreign key properties; Using navigation properties to define relationships | |
| 546 | |a English. | ||
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