Part 2 Entity Framework in depth 《Entity Framework Core in Action》 -- SECOND EDITION Author: JON P SMITH 如果需要电子书的小伙伴,可以留下邮箱,看到了会发送的 8 Configuring relationships 8.2 What navigational properties do you need? 实体类之间关系的配置应该以项目的业务需求为指导。您可以在关系的...
NuGet library Microsoft.EntityFrameworkCore.Proxies 在生成应用程序的 DbContext 选项时添加 UseChangeTrackingProxy 方法 varoptionsBuilder =newDbContextOptionsBuilder<EfCoreContext>(); optionsBuilder .UseChangeTrackingProxies() .UseSqlServer(connection);varoptions = optionsBuilder.Options;using(varcontext =new...
1.Introduction to Entity FrameworkCore Read in liveBook 2.Querying the database Read in liveBook 3.Changing the database content Read in liveBook 4.Using EF Core in business logic Read in liveBook 5.Using EF Core in ASP.NET Core web applications ...
Entity Framework Core in Action, Second Edition is an in-depth guide to reading and writing databases with EF Core. Revised from the bestselling original edition, it’s filled with over 100 diagrams, code snippets, and examples—including building and scaling your own bookselling web application...
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EfCoreInAction Welcome to the Git repo that is associated with the bookEntity Framework Core in Actionpublished byManning Publications. This book details how to useEntity Framework Core(EF Core) to develop database access code in.NET Coreapplications. ...
这一章我们看一看微软官方提供的ORM框架-EntityFrameworkCore。 DbContext DbContext也叫数据库上下文,通过数据库上下文我们进行对数据库操作。 使用数据库上下文之前,先要添加必要的Nuget包:Microsoft.EntityFrameworkCore 安装好这个包之后,新建一个类:AppDbContext,集成DbContext。 public class AppDbContext:DbContext ...
EntityFramework Core问题集锦 更新单个实体 更新单个实体的方式有两种: (1)查询出实体进行赋值更新 说的更专业一点则是已被跟踪的实体进行赋值更新,此时实体已被快照,此时进行更新时只需要调用SaveChanges或者SaveChangesAsync,当已赋值属性与快照中值不同时,此时调用SaveChangesAsync或者SaveChanges方法时会将此属性的状态即(...
1 var inString = list.FindAll(s => s.Indexof("YJingLee") >= 0); 1. 可以看出,Lambda表达式格式为:(参数列表)=>表达式或语句块 .NET中的数据访问 这一部分介绍.NET中不同的数据访问层的使用方式,由此得出Entity Framework在一个.NET系统中的应用及其在原有设计基础上的改变。从大的方面来看数据访问...
Use C#, .NET classes, and LINQ to interact with databases like Sqlite, Azure SQL Server and even Azure Cosmos DB from .NET 5 apps with Entity Framework Core. See the latest features in action like many-to-many, table-per-type and filtered includes.ม...