在上面的代码中,我们想在GetActiveQuestions()返回List<QuestionItem>时,QuestionItem中要包含User信息,所以在LINQ查询使用了.Include(q => q.User)。 (特别要注意的是:这里把q.User.IsActive作为查询条件之一) 然后我们用SQL Server Profiler发现,Entity Framework生成了如下的SQL语句: SELECT TOP (25) [Filter1]...
EFOjbectSet.Include(a => a.parent)扩展不可用。我知道我可以添加代码来模仿它,但根据EntityFramework 4 upgraded to 5, lambda is not available它应该是可用的。我有using System.Data.Entity,并在我的主项目中升级到 EF 5。 查看程序集 System.Data.Entity.dll v4.0.0.0 (C:\Program Files (x86)\Refere...
Entity Framework Not include child Object Entity Framework Power Tools menu not visible Entity Framework Related Error Entity Framework Repository and GetAll Entity Framework returning old data Entity Framework SaveChanges not saving updated data Entity Framework Treats XML type in SQL Server as a string...
-- For more information on Entity Framework configuration, visit http://Go.microsoft.com/fwlink/?LinkID=237468 --></configSections><startup><supportedRuntimeversion="v4.0"sku=".NETFramework,Version=v4.5"/></startup><entityFramework><defaultConnectionFactorytype="System.Data.Entity.Infrastructure....
Unique Constraints in the Entity FrameworkUpdate: this feature has been postponed and will not be included in Entity Framework 5. Unique...Date: 03/09/2011Table-Valued Function SupportOne of the key features coming in the next release of Entity Framework is Table-Valued Function......
Contoso University 範例 Web 應用程式說明如何使用 Entity Framework 5 Code First 和 Visual Studio 建立 ASP.NET MVC 4 應用程式。
Include:详见下面预加载一节。 AsNoTracking:相见变更跟踪一节。 Local属性:用来跟踪所有EF Context中状态为Added,Modified、Unchanged的实体。作用好像不是太大。没怎么用过。 Create:这个方法至今好像没有用到过,不知道干啥的。有了解的评论中给解释下吧。
EF Core 6.0 Release Candidate 1 was released to NuGet a few weeks ago. This release is the first of two “go live” release candidates that are supported in production. EF Core 6.0 RC1 runs on Release Candidate 1 for .NET 6.0, which also has a “go live” license. ...
Entity Framework not found in build pipeline Closed - Not a Bug47 1Votes totom -Reported Nov 11, 2019 11:14 PM Hi There, We’ve been having issues with our build pipeline this morning, it worked fine last week however we’ve been getting the following since this morning...
不是你，cannot do that in mapping。典型的解决方法是简单的扩展方法：