Dynamic Query是一个支持动态Entity Framework查询的库。它的设计初衷是为了减少在管理系统中大量出现的对一个数据集进行查找、排序、分页的这类场景的开发工作量,其设计思想是”markup is code ”。通过在View上编写具有语义信息的标签,来实现这类常见的功能需求,而不再需要额外的代码。它不是一个完整的ORM,是基于E...
}staticBlog GetUnCompileQueryBlog(EFCoreDbContext context) {returncontext.Blogs.Include(c =>c.Posts) .OrderBy(o=>o.Id) .FirstOrDefault(); } 我们看到上述利用常规查询总耗时27秒,接下来我们再来看看显式编译查询耗时情况。 privatestaticFunc<EFCoreDbContext, Blog> _getCompiledBlog = EF.CompileQuery...
程序集: Microsoft.EntityFrameworkCore.dll 包: Microsoft.EntityFrameworkCore v9.0.0 Source: IncludeExpression.cs 表示执行此 include 的实体的表达式。 C# 复制 public virtual System.Linq.Expressions.Expression EntityExpression { get; } 属性值 Expression 适用于 产品版本 Entity Framework Co...
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 ...
DbSet<TEntity> DbUpdateConcurrencyException DbUpdateException DeleteBehavior EF EF 属性 方法 CompileAsyncQuery CompileQuery Property EntityFrameworkQueryableExtensions EntityState EntityTypeExtensions ExecutionStrategyExtensions ForeignKeyExtensions IDbContextFactory<TContext> IEntityTypeConfiguration<TEntity> Index...
Microsoft.EntityFrameworkCore.dll Package: Microsoft.EntityFrameworkCore v9.0.0 Source: IncludeExpression.cs The navigation associated with this include operation. C# publicvirtualMicrosoft.EntityFrameworkCore.Metadata.INavigationBase Navigation {get; } ...
Microsoft.EntityFrameworkCore.Query 組件: Microsoft.EntityFrameworkCore.Relational.dll 套件: Microsoft.EntityFrameworkCore.Relational v1.1.6 結束包含範圍。 C# publicvirtualvoidEndIncludeScope(); 適用於 產品版本 Entity Framework Core1.0, 1.1 本文內容 ...
var organizations = (from o in context.organizations.Include("organizationusers") select o); foreach (var organization in organizations) { Debug.WriteLine(string.Format("Org: {0}", organization.Name)); foreach (var organizationUser in organization.organizationusers) ...
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); ...
.Include(d => d.Posts) .IgnoreQueryFilters() .AsNoTracking() .ToList(); } 使用HasQueryFilter进行查询过滤是不是就是如此简单呢?是不是问题到此就这样结束了呢?看过Jeff博客的童鞋知道,Jeff经常问这样的问题且自问自答,肯定不止于此,我们继续往下探索。上述我们只是应用一个博客实体,我们还存在发表实体且...