public virtual int Id { get; set; } public virtual string Title { get; set; } public virtual string Content { get; set; } public virtual int BlogId { get; set; } public virtual Blog Blog { get; set; } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 此时我们从Blog来看,一个Blog下对应...
属性。 C# 复制 public virtual Microsoft.EntityFrameworkCore.Metadata.IReadOnlyProperty Property { get; } 属性值 IReadOnlyProperty 适用于 产品版本 Entity Framework Core 2.0, 2.1, 2.2, 3.0, 3.1, 5.0, 6.0, 7.0, 8.0, 9.0 在GitHub 上与我们协作 可以在 GitHub 上找到此内容的源,还可以在...
using Microsoft.EntityFrameworkCore; using Microsoft.Extensions.DependencyInjection; using System; using System.Collections.Generic; using System.Text; using System.Threading; namespace EntityFramework.UnitOfWorks.Impl { public class UnitOfWorkManager : IUnitOfWorkManager { private readonly IServiceProvider _...
2 Entity Framework Core数据库连接字符串 数据库连接字符串包含了数据源以及一些必要的连接信息,EF Core需要连接字符串和数据库进行交互,指定数据库操作像新增,读取等,打开SQL Sever Object Explorer,鼠标选中数据库,右击属性,在属性窗体中找到Connection String并且复制该值 数据库连接字符串是: Data Source=(localdb)...
由上知,对于一对多关系中的外键,EF Core会默认创建其索引,当然这里的索引肯定是非唯一非聚集索引,聚集索引为其主键。我们通过数据库上就可以看到,如下: 此时即使我们不配置指定外键为BlogId同样也没毛病,如下: b.HasMany(m => m.Posts).WithOne(o => o.Blog); ...
Entity Framework Core7.0, 8.0, 9.0 HasConversion(Type, ValueComparer) Source: PropertyBuilder.cs 配置 属性,以便在写入数据库之前转换属性值,并在从数据库读取数据时转换回来。 C# publicvirtualMicrosoft.EntityFrameworkCore.Metadata.Builders.PropertyBuilderHasConversion(Type conversionType, Microsoft.E...
EntityFramework Core 1.1迁移 我们首先还是给出本文需要说到的两个类,博客类(Blog)和文章发表类(Post)。基于每个类都有主键Id,我们定义一个接口。如下: public interface IEntityBase { int Id { get; set; } } 1. 2. 3. 4. public class Blog : IEntityBase ...
1. 编辑应用程序的 .csproj 文件,将Microsoft.EntityFrameworkCore.Tools.DotNet添加为DotNetCliToolReference项 2. 执行以下命令 ~ $ dotnet add package Microsoft.EntityFrameworkCore.Design ~ $ dotnet restore 完成以上步骤,.csproj 文件如下所示: <ProjectSdk="Microsoft.NET.Sdk"><PropertyGroup><OutputType>Exe...
lazy loading. When performing explicit loads is not required, you can use lazy loading (also known as deferred loading) to load related entities when a navigation property is accessed for the first time. In Visual Studio 2010, this is done by making the navigation properties virtual properties....
PropertyValue Description For internal use only. DisplayName Is Customizable IsValidForForm False IsValidForRead True LogicalName iscustomizable RequiredLevel SystemRequired Type ManagedPropertyNameDévelopper la table PropertyValue Description Name DisplayName Name IsValidForForm True IsValidForRead ...