using IdentityServer4.EntityFramework.DbContexts; using IdentityServer4.EntityFramework.Mappers; 然后我们可以从Configure方法中调用它: publicvoidConfigure(IApplicationBuilder app){// 这将完成初始数据库填充InitializeDatabase(app);
Add-Migration InitializeUpdate-Database 2. 添加实体和映射数据库 使用EF CORE中添加实体,约束属性和关系,最后将其映射到数据库中的方式有两种,一种是Data Annotations,另一种是Fluent Api,这两种方式并没有优劣之分,全凭开发者喜好和需求,不过相对而言,Fluent Api提供的功能更多。 1. 准备工作 新增三个实体 pub...
Instances of this class are typically obtained from Database and it is not designed to be directly constructed in your application code. C# 复制 public class DatabaseFacade : Microsoft.EntityFrameworkCore.Infrastructure.IInfrastructure<IServiceProvider>, Microsoft.EntityFrameworkCore.Infrastructure.I...
usingMicrosoft.EntityFrameworkCore;usingContosoUniversity.Models;namespaceContosoUniversity.Data{publicclassSchoolContext:DbContext{publicSchoolContext(DbContextOptions<SchoolContext> options) :base(options){ }publicDbSet<Student> Students {get;set; }publicDbSet<Enrollment> Enrollments {get;set; }publicDbSet...
4 Entity Framework Core种子数据 我们创建数据库并且通过代码填充测试数据,我们称之为种子数据,在应用程序的Data目录创建一个新的静态类DbInitializer,Initialize方法将测试数据插入到数据库中: public static class DbInitializer { public static void Initialize(CompanyContext context) { // Look for any students. ...
EntityFrameworkCore.Database.Command[20102] Failed executing DbCommand Failed to Execute URL Failed to load resource: the server responded with a status of 401 (Unauthorized) Failed to load resource: the server responded with a status of 404 (Not Found) signalr/hubs Failed to load resource: ...
在EntityFramework Core中我们利用上下文进行操作之前就是按照上述代码由上至下整体上做了如下三步准备工作: 【1】实例化上下文时,查找DbSet属性并缓存到内存中 【2】以上下文作为缓存的键,将上下文中的所有模型数据缓存在内存中,若未缓存执行第【3】步。
using IdentityMySQLDemo.Models; using System.Data.Entity; using System.Data.Entity.Infrastructure; using System.Linq; namespace IdentityMySQLDemo { public class MySqlInitializer : IDatabaseInitializer<ApplicationDbContext> { public void InitializeDatabase(Application...
Entity Framework 6.2.0 ProductVersions Entity Framework 6.2.0 DbContext(String, DbCompiledModel) Constructs a new context instance using the given string as the name or connection string for the database to which a connection will be made, and initializes it from the given model. See the ...
Entity Framework 6.2.0 ProductVersions Entity Framework 6.2.0 DbContext(String, DbCompiledModel) Constructs a new context instance using the given string as the name or connection string for the database to which a connection will be made, and initializes it from the given model. See the ...