Typically you create a class that derives from DbContext and containsDbSet<TEntity>properties for each entity in the model. If theDbSet<TEntity>properties have a public setter, they are automatically initialized when the instance of the derived context is created. ...
context class, or to individual properties on the class. The Entity Data Model backing the context can be specified in several ways. When using the Code First approach, theDbSet<TEntity>properties on the derived context are used to build a model by convention. The protected OnModelCreating ...
DbContext Class Reference Feedback Definition Namespace: System.Data.Entity Assembly: EntityFramework.dll A DbContext instance represents a combination of the Unit Of Work and Repository patterns such that it can be used to query from a database and group together changes that will then be ...
然后生成的数据库是: 连接字符串 usingSystem;usingSystem.Collections.Generic;usingSystem.Data.Entity;usingSystem.Linq;usingSystem.Text;usingSystem.Threading.Tasks;namespaceEF1 {publicclassDbContextClass:DbContext {publicDbContextClass() :base("ConnectionString")//或者你也可以这样 : base("name=ConnectionS...
("name=ConnectionString") { } public DbSet<Student> Studnets { get; set; } public DbSet<Standard> Standards { get; set; } protected override void OnModelCreating(DbModelBuilder modelBuilder) { Database.SetInitializer(new DropCreateDatabaseIfModelChanges<DbContextClass>()); base.OnModelCreating(...
public class TestQueryProvider : IAsyncQueryProvider { public TestQueryProvider(IDBGetName ta, IQueryCompiler query,IWebGetName webGetName) { Ta = ta; Query = query; WebGetName = webGetName; } public IDBGetName Ta { get; } public IQueryCompiler Query { get; } public IWebGetName WebGe...
publicclassDbContextConfiguration Inheritance Object DbContextConfiguration Properties AutoDetectChangesEnabled Gets or sets a value indicating whether theDetectChanges()method is called automatically by methods ofDbContextand related classes. The default value is true. ...
1publicclassBreakAwayContext : DbContext 2{ 3publicDbSet<Destination> Destinations {get;set; } 4publicDbSet<Lodging> Lodgings {get;set; } 5publicDbSet<Trip> Trips {get;set; } 6publicDbSet<Person> People {get;set; } 7publicDbSet<Reservation> Reservations {get;set; } ...
publicclassProductContext:DbContext{publicDbSet<Category> Categories {get;set; }publicDbSet<Product> Products {get;set; } } 获得上下文后,将通过这些属性在上下文中查询、添加(使用Add或Attach方法)或删除(使用Remove)实体。 访问上下文对象上的DbSet属性表示开始进行查询,返回指定类型的所有实体。 请注意,仅访...
public class TestDBContext : DbContext { public TestDBContext() : base("name=TestDBContext") { } protected override void OnModelCreating(DbModelBuilder modelBuilder) { //modelBuilder.Configurations.Add(new vwCustomerConfiguration()); Database.SetInitializer<TestDBContext>(null); } public DbSet<Cu...