l Include:可通过此方法查询出与相关的实体对象。实例代码如下: using (var edm = new NorthwindEntities()) { string esql1 = "select value c from NorthwindEntities.Customers as c WHERE c.CustomerID ='HANAR'"; ObjectQuery<Customers> query1 = edm.CreateQuery<Customers>(esql1); query1 = query1...
Namespace: Microsoft.EntityFrameworkCore.Query Assembly: Microsoft.EntityFrameworkCore.dll Package: Microsoft.EntityFrameworkCore v2.2.6 Source: IncludeSpecification.cs Represents a single query include operation.C# Copy public class IncludeSpecification...
实例代码如下: using (var edm = new NorthwindEntities()) { string esql1 = "select value c from NorthwindEntities.Customers as c WHERE c.CustomerID ='HANAR'"; ObjectQuery<Customers> query1 = edm.CreateQuery<Customers>(esql1); query1 = query1.Include("Orders"); foreach (Customers c in ...
IncludeExpression(Expression, Expression, INavigationBase) 创建IncludeExpression 类的新实例。 完成“包括”后,导航将设置为加载。 IncludeExpression(Expression, Expression, INavigationBase, Boolean) 这是一个支持 Entity Framework Core 基础结构的内部 API,不受与公共 API 相同的兼容性标准的约束。 可能会在...
EntityFramework Core 2.0显式编译查询 比如我们要从博客实体中通过主键查询博客同时饥饿加载发表文章的集合列表,如下: varid =1;using(varcontext =newEFCoreDbContext()) {varblog =context.Blogs .AsNoTracking() .Include(c=>c.Posts) .Where(c=> c.Id ==id) ...
Entity Framework Core 2.2 EntityQueryModelVisitorDependencies EntityQueryModelVisitorFactory ICompiledQueryCacheKeyGenerator IEntityQueryModelVisitorFactory IIncludableQueryable<TEntity,TProperty> IncludeSpecification IQueryCompilationContextFactory IQueryContextFactory ...
在后文中，笔者会直接进入正题，所以这篇文章仍然还是需要一定的EF ORM基础。 对于纯新手用户，不妨先去...
Microsoft.EntityFrameworkCore.dll Package: Microsoft.EntityFrameworkCore v9.0.0 Source: IIncludableQueryable.cs Supports queryable Include/ThenInclude chaining operators. C#复制 publicinterfaceIIncludableQueryable<outTEntity,outTProperty> :System.Collections.Generic.IEnumerable<outTEntity>,System.Linq.IQueryab...
EntityFramework Core 2.0全局过滤(HasQueryFilter) 前言 EntityFramework Core每一次版本的迭代和更新都会带给我们惊喜,每次都会尽量满足大部分使用者的需求。在EF Core 2.0版本中出现了全局过滤新特性即HasQueryFilter,它出现的意义在哪里?能够解决什么问题呢?这是我们需要思考的问题。通过HasQueryFilter方法来创建过滤器...
System.Data.Entity.dll Specifies the related objects to include in the query results. C# publicSystem.Data.Objects.ObjectQuery<T>Include(stringpath); Parameters path String Dot-separated list of related objects to return in the query results. ...