Lazy Loading 在Entity Framework4.0及其以后版本,LazyLoading是默认打开的,从数据库生成Model后,我们可以在EDMX文件空白处单击,并在属性窗口看到这一设置: 图2 也可以以XML形式打开EDMX文件,在CSDL部分看到这一设置: View Code 注意:Lazy Loading的设置是针对所有Model的,并非某一个
Lazy loading is the process whereby an entity or collection of entities is automatically loaded from the database the first time that a property referring to the entity/entities is accessed. 大概意思就是LazyLoading发生在当我们访问第一次访问实体或者集合的属性时。 3.如果Navigate属性是非集合,那么不...
3. 在EF Core 2.1中我们需要下载【Microsoft.EntityFrameworkCore.Proxies】包,同时在OnConfiguring方法中配置启用延迟加载代理,如下: 除了通过如上配置外导航属性必须用virtual关键字修饰(如上示例类未添加,请自行添加),否则将抛出异常,你懂的。接下来在完全配置好延迟加载的前提下再来进行如下查询,此时在我们需要用到Po...
I am very glad to see that Lazy Loading is now implemented in EF4, because it makes the entity world more flexible. J All the sample codes in this post can be found in the samples CSEFLazyLoading (C#) and VBEFLazyLoading (VB.NET) in All-In-One Code Framework which is an open-...
Enabling lazy loading by proxies requires three steps: Install the Microsoft.EntityFrameworkCore.Proxies package language-cmd Explain code | Copy code [Package Manager Console] install-package Microsoft.EntityFrameworkCore.Proxies [Dotnet CLI] add package Microsoft.EntityFrameworkCore.Proxies Use the Use...
Entity 屬性 參考 意見反應 定義 命名空間: Microsoft.EntityFrameworkCore.Diagnostics 組件: Microsoft.EntityFrameworkCore.dll 套件: Microsoft.EntityFrameworkCore v9.0.0 來源: LazyLoadingEventData.cs 起始延遲載入的實體實例。 C# 複製 public virtual object Entity { get; } 屬性值 Object ...
Lazy Loading Implementation in Entity Framework To enable Lazy Loading in Entity Framework, we must mark the navigation properties, both reference navigations as well as collection navigations, as virtual in the Book class: public class Book { public int BookId { get; set; } public string Titl...
Entity Framework 4 has Lazy Loading built-in and enabled by default. Here’s a quick bit of code to show you how to work with this feature.
Entity Framework提供了三种加载相关实体的方法:Lazy Loading,Eager Loading和Explicit Loading。首先我们先来看一下MSDN对三种加载实体方法的定义。 Lazy Loading:对于这种类型的加载,在您访问导航属性时,会从数据源自动加载相关实体。 使用此加载类型时,请注意,如果实体尚未在 ObjectContext ... ...
In this post, we will be discussing about Eager Loading, Lazy Loading and Explicit Loading in an Entity Framework. All three terms -- Eager Loading, Lazy Loading and Explicit Loading -- refer to the process of loading the related entities. They define when to load the related entities or ...