当调用SaveChanges方法时,EntityFramework默认情况下总是先对所有已经变化的实体类中所有的属性值进行检测,如果你需要更新大批量的数据实体并且这些实体已经通过了验证,那么这一步显然多余,你可以通过暂时性地关闭验证机制使得保存数据的进度花费更少的时间(借助“”属性进行设置)。关于此更多的信息你可以参考EntityFramework...
If you've had many-to-many relationships when using the database-first strategy, you may be familiar with the fact that Entity Framework can create many-to-many mappings when the database join table contains only the primary keys of the related entities. This mapping rule is the same for ...
IRelatedEnd.Add 方法参考 反馈 定义命名空间: System.Data.Entity.Core.Objects.DataClasses 程序集: EntityFramework.dll 重载展开表 Add(IEntityWithRelationships) 将对象添加到相关端。 Add(Object) 将对象添加到相关端。Add(IEntityWithRelationships) 将对象添加到相关端。 C# 复制 public void Add (...
Displaying Related Entities in a Separate Control Using the EntityDataSource "Selected" Event to Display Related Data byTom Dykstra The Contoso University sample web application demonstrates how to create ASP.NET Web Forms applications using the Entity...
将实体添加到相关端。 此方法与 Add(object) 的工作方式完全相同。 保留此方法是为了与以前版本的 IRelatedEnd 向后兼容。 命名空间:System.Data.Entity.Core.Objects.DataClasses 程序集:EntityFramework(在 EntityFramework.dll 中) 语法 VB复制 声明<SuppressMessageAttribute("Microsoft.Design","CA1033:InterfaceMet...
A lightweight, extensible, open-source, and cross-platform version of the Entity Framework data access technology.
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. ...
ADO.NET Entity Framework Entity Framework 概觀 使用者入門 設定Entity Framework 模型化及對應檔案 查詢概念模型 使用物件 使用物件 複雜型別物件 識別解析、狀態管理和變更追蹤 定義及管理關聯性 建立、加入、修改和刪除物件 建立、加入、修改和刪除物件 HOW TO:加入、修改和刪除物件 HOW TO:使用靜態 Create 方法建...
staticvoidMain(string[]args){varx=ConfigurationManager.GetSection(“entityFramework”);using(varctx=newNorthwindEntities()){Productsp=newProducts{ProductName="Phone"};ctx.Products.Add(p);ctx.SaveChanges();varpp=ctx.Products.Find(1);}} 代码段 3 ...
Add, Remove and Attach are similar to AddObject, DeleteObject and Attach on ObjectSet<T>. We’ve renamed Add and Remove to keep DbSet<TEntity> consistent with other sets in the framework.Add and Attach can now be called on objects that are already tracked by the context, Add will ensure...