如何使用EF Core加载导航属性？ [英] How to load the navigation property with EF Core?

问题描述

在EF6中，我们有这样的选择：

In EF6 we had such option:

context.Set<TEntity>().Attach(entity);
context.Entry(entity).Collection("NavigationProperty").Load();

由于EF Core 100％严格键入，因此它们删除了收集功能。但是应该用什么代替呢？

Since EF Core "goes 100% strictly typed" they have removed Collection function. But what should be used instead?

添加：
我的意思是如何为ATTACHED实体加载include /导航集合属性？

Added: I mean how to load includes/"navigation collection properties" for ATTACHED entity?

推荐答案

显式加载已在Entity Framework Core v1.1中添加。
请参见 Microsoft文档

Explicit Loading was added in Entity Framework Core v1.1. See Microsoft Docs

从文档中

using (var context = new BloggingContext())
{
    var blog = context.Blogs
    .Single(b => b.BlogId == 1);

    context.Entry(blog)
        .Collection(b => b.Posts)
        .Load();

    context.Entry(blog)
        .Reference(b => b.Owner)
        .Load();
}

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