命名空间: Microsoft.EntityFrameworkCore.Metadata.Conventions 程序集: Microsoft.EntityFrameworkCore.dll 包: Microsoft.EntityFrameworkCore v8.0.0 一个约定,该约定将属性配置为并发令牌( ConcurrencyCheckAttribute如果属性具有 )。C# 复制 public class ConcurrencyCheckAttributeConvention : Microsoft.En...
protected override void ProcessPropertyAdded (Microsoft.EntityFrameworkCore.Metadata.Builders.IConventionPropertyBuilder propertyBuilder, System.ComponentModel.DataAnnotations.ConcurrencyCheckAttribute attribute, System.Reflection.MemberInfo clrMember, Microsoft.EntityFrameworkCore.Metadata...
命名空間: System.Data.Entity.ModelConfiguration.Conventions 組件: EntityFramework.dll 處理在模型中屬性上找到之 ConcurrencyCheckAttribute 實例的慣例。C# 複製 public class ConcurrencyCheckAttributeConvention : System.Data.Entity.ModelConfiguration.Conventions.PrimitivePropertyAttributeConfigurationCon...
[ConcurrencyCheck]publicstringStudentName {get;set; } } As you can see in the above example, ConcurrencyCheck attribute is applied to existing StudentName property of the Student class. So, Code-First will include StudentName column in update command to check for optimistic concurrency. execsp_exe...
Entity Framework运行环境 EF5由两部分组成,EF api和.net framework 4.0/4.5,而EF6是独立的EntityFramework.dll,不依赖.net Framework。使用NuGet即可安装EF。 创建实体数据模型 添加完成之后,.config文件中会添加配置 每个Entity Data Model 生成一个context类,类数据库每个表生成一个entity类。如在School.edmx中包含...
There is one more step required in order for the Entity Framework to use the timestamp column for concurrency checking: you will need to set the ConcurrencyMode for the Updated property on the Order entity from None to Fixed (see Figure 10 ). Figure 9 Updating an Order Using LINQ to ...
EntityFramework.CommonTools Extension for EntityFramework and EntityFramework Core that provides: Expandable Extension Methods, Complex Types as JSON, Auditing, Concurrency Checks, Specifications and serializable Transacton Logs.DocumentationExpandable IQueryable Extensions JSON Complex Types Specification Pattern...
and none of them makes the context to throw the exception. TESTED WITH: - MySQL: 8.0.31 (MySQL Community Server - GPL) - MySql.EntityFrameworkCore Version 7.0.0 - Net 6How to repeat:I've created a repo with a sample app to reproduce the error:https://github.com/diegoacosta-sage/ef...
For Database First and Model First, see Chapter 23 of Programming Entity Framework, 2e. If a property that can be updated on the client is used as a concurrency token, this approach will not suffice. Because this approach does not track the original value of properties, the concurrency ...
二、Entity Framework架构 EDM (实体数据模型):EDM包括三个模型,概念模型、 映射和存储模型。 概念模型 ︰ 概念模型包含模型类和它们之间的关系。独立于数据库表的设计。 存储模型 ︰ 存储模型是数据库设计模型,包括表、 视图、 存储的过程和他们的关系和键。