通常在DbContext里中的OnModelCreating方法中使用FluentAPI 通过覆写OnModelCreating方法实现配置管理 publicclassSchoolDBContext:DbContext { public DbSet<Student> Students { get;set; } protected overridevoidOnModelCreating(ModelBuilder modelBuilder){//属性配置(Property Configurations)modelBuilder.Entity<Student>() ...
一、FluentAPI: 1、基本配置: namespaceConsoleApp14.ModelConfig {publicclassPersonConfig: EntityTypeConfiguration<Person>{//继承自EntityTypeConfiguration,并将Person传进来publicPersonConfig() {this.ToTable("T_Persons"); } } } publicclassTestDbContext:DbContext {publicTestDbContext():base("name=connst...
我们在DbContext类OnModelCreating()方法内完成EF Core Fluent API的配置 public class CountryContext : DbContext{ public CompanyContext(DbContextOptions<CompanyContext> options) : base(options) { } public DbSet<Country> Country { get; set; } protected override void OnModelCreating(ModelBuilder modelBuilde...
classBookEntityConfig:IEntityTypeConfiguration<Book>{publicvoidConfigure(EntityTypeBuilder<Book>builder){builder.ToTable("T_Books");}} 创建继承自DbContext的类 代码语言:javascript 复制 internalclassMyDbContext:DbContext{publicDbSet<Book>Books{get;set;}protectedoverridevoidOnConfiguring(DbContextOptionsBuilder...
Fluent API特性列举 当然,System.ComponentModel.DataAnnotations命名空间的DataAnnotation在EntityFramework程序集中也有相应的API: 设置属性需要在数据库操作上下文的 代码语言:javascript 复制 protectedoverridevoidOnModelCreating(DbModelBuilder modelBuilder){base.OnModelCreating(modelBuilder);} ...
modelBuilder.Entity<UserDetail>() .Property(e => e.Height) .HasPrecision(18, 0); } } 2、使用Fluent API 配置的Code First模式代码结构 不管是Code First模式中使用 Fluent API 配置,还是使用了前面的Attribute特性标记的说明,都是为了从代码层面上构建实体类和表之间的信息,或者多个表之间一些关系,不过如...
Fluent API specify the model configuration that you can with data annotations as well as some additional functionality that can not be possible with data annotations.In Entity Framework Core, the ModelBuilder class acts as a Fluent API.We can configure many different things by using it because ...
Represents an entity type in a model.C# 复制 public interface IEntityType : Microsoft.EntityFrameworkCore.Metadata.IReadOnlyEntityType, Microsoft.EntityFrameworkCore.Metadata.ITypeBaseDerived Microsoft.EntityFrameworkCore.Metadata.RuntimeEntityType
can then create an instance ofIndexAnnotationwhich is an EF specific type that will convert theIndexAttributesettings into a model annotation that can be stored on the EF model. These can then be passed to theHasColumnAnnotationmethod on the Fluent API, specifying the nameIndexfor the annotation...
Entity types can be mapped to database views using the Fluent API. Note EF will assume that the referenced view already exists in the database, it will not create it automatically in a migration. C# modelBuilder.Entity<Blog>().ToView("blogsView", schema:"blogging"); ...