没有合适的资源?快使用搜索试试~ 我知道了~
首页EF.DBContext.pdf
资源详情
资源评论
资源推荐
Programming Entity Framework:
DbContext
Julia Lerman and Rowan Miller
Beijing
•
Cambridge
•
Farnham
•
Köln
•
Sebastopol
•
Tokyo
Programming Entity Framework: DbContext
by Julia Lerman and Rowan Miller
Copyright © 2012 Julia Lerman and Rowan Miller. All rights reserved.
Printed in the United States of America.
Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472.
O’Reilly books may be purchased for educational, business, or sales promotional use. Online editions
are also available for most titles (http://my.safaribooksonline.com). For more information, contact our
corporate/institutional sales department: (800) 998-9938 or corporate@oreilly.com.
Editors: Meghan Blanchette and
Rachel Roumeliotis
Production Editor: Teresa Elsey
Cover Designer: Karen Montgomery
Interior Designer: David Futato
Illustrators: Robert Romano and Rebecca Demarest
Revision History for the First Edition:
2012-02-23 First release
See http://oreilly.com/catalog/errata.csp?isbn=9781449312961 for release details.
Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of
O’Reilly Media, Inc. Programming Entity Framework: DbContext, the image of a great African heron,
and related trade dress are trademarks of O’Reilly Media, Inc.
Many of the designations used by manufacturers and sellers to distinguish their products are claimed as
trademarks. Where those designations appear in this book, and O’Reilly Media, Inc., was aware of a
trademark claim, the designations have been printed in caps or initial caps.
While every precaution has been taken in the preparation of this book, the publisher and authors assume
no responsibility for errors or omissions, or for damages resulting from the use of the information con-
tained herein.
ISBN: 978-1-449-31296-1
[LSI]
1330008698
Table of Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
1. Introducing the DbContext API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Getting the DbContext API into Your Project 2
Looking at Some Highlights of the DbContext API 3
Reducing and Simplifying Ways to Work with a Set 5
Retrieving an Entity Using ID with DbSet.Find 5
Avoiding Trolling Around the Guts of Entity Framework 6
Working with the BreakAway Model 6
Getting the Sample Solution 6
Getting DbContext from an EDMX Model 8
Ensuring DbContext Instances Get Disposed 11
2. Querying with DbContext . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Writing Queries with LINQ to Entities 13
Querying All the Data from a Set 16
Using LINQ for Sorting, Filtering, and More 18
Finding a Single Object 21
Querying Local Data 24
Using the Load Method to Bring Data into Memory 26
Running LINQ Queries Against Local 27
Working with the ObservableCollection Returned by Local 29
Loading Related Data 30
Lazy Loading 31
Eager Loading 33
Explicit Loading 36
Checking If a Navigation Property Has Been Loaded 38
Querying Contents of a Collection Navigation Property 39
Explicit Loading a Subset of the Contents of a Navigation Property 41
iii
剩余255页未读,继续阅读
tableliu001
- 粉丝: 3
- 资源: 9
上传资源 快速赚钱
- 我的内容管理 收起
- 我的资源 快来上传第一个资源
- 我的收益 登录查看自己的收益
- 我的积分 登录查看自己的积分
- 我的C币 登录后查看C币余额
- 我的收藏
- 我的下载
- 下载帮助
会员权益专享
最新资源
- RTL8188FU-Linux-v5.7.4.2-36687.20200602.tar(20765).gz
- c++校园超市商品信息管理系统课程设计说明书(含源代码) (2).pdf
- 建筑供配电系统相关课件.pptx
- 企业管理规章制度及管理模式.doc
- vb打开摄像头.doc
- 云计算-可信计算中认证协议改进方案.pdf
- [详细完整版]单片机编程4.ppt
- c语言常用算法.pdf
- c++经典程序代码大全.pdf
- 单片机数字时钟资料.doc
- 11项目管理前沿1.0.pptx
- 基于ssm的“魅力”繁峙宣传网站的设计与实现论文.doc
- 智慧交通综合解决方案.pptx
- 建筑防潮设计-PowerPointPresentati.pptx
- SPC统计过程控制程序.pptx
- SPC统计方法基础知识.pptx
资源上传下载、课程学习等过程中有任何疑问或建议,欢迎提出宝贵意见哦~我们会及时处理!
点击此处反馈
安全验证
文档复制为VIP权益,开通VIP直接复制
信息提交成功
评论0