运行程序,会在数据库中创建相应的table并将数据写入后读取输出到控制台. 源代码我会上传到git上,链接. DBModelBuilder 上述代码中的Ef6RecipesContext类中有个DBModelBuilder,我查了一下文档, 一般使用这个类的EF项目基本上都是CODE FIRST approach.解释一下这玩意: DbModelBuilder用于将CLR类映射到数据库模型. 这...
Cross-platform: EF Core can be used on a variety of platforms including Windows, Linux, and Mac. Lightweight: EF Core has a smaller footprint and fewer dependencies than the full version of Entity Framework. Code first: EF Core allows developers to create a database from code, which enable...
1. What is the main purpose of the Code First approach in Entity Framework? A. Database-first design B. Modeling domain classes C. Using stored procedures D. Managing database migrations Show Answer 2. Which namespace is typically used for Entity Framework Code First? A. System....
Code First Development: EF Core supports code first approach, where you define your database structure using C# classes. Migration: EF Core includes support for data migrations, allowing for database schema changes directly from the code. LINQ Support: With EF Core, you can use Language Integrate...
NuGet library Microsoft.EntityFrameworkCore.Proxies 在生成应用程序的 DbContext 选项时添加 UseChangeTrackingProxy 方法 varoptionsBuilder =newDbContextOptionsBuilder<EfCoreContext>(); optionsBuilder .UseChangeTrackingProxies() .UseSqlServer(connection);varoptions = optionsBuilder.Options;using(varcontext =new...
Visual Studio Visual Studio Code C# Copy using ContosoUniversity.Data; using Microsoft.EntityFrameworkCore; var builder = WebApplication.CreateBuilder(args); builder.Services.AddRazorPages(); builder.Services.AddDbContext<SchoolContext>(options => options.UseSqlServer(builder.Configuration.GetConnection...
This article introduces how to perform the Create, Read, Update, and Delete (CRUD) operations in ASP.NET Core, using Entity Framework Core. We will use the "Code First" development approach and create a database from model using migration. We can view this article’ssampleon TechNet Gall...
language-csharp Explain code | Copy code public partial class CreateDatabase : Migration { protected override void Up(MigrationBuilder migrationBuilder) { if(ActiveProvider == "Microsoft.EntityFrameworkCore.SqlServer") { // do something SQL Server - specific } if(ActiveProvider == "Microsoft.Entit...
Visual Studio Visual Studio Code C# Copy using ContosoUniversity.Data; using Microsoft.EntityFrameworkCore; var builder = WebApplication.CreateBuilder(args); builder.Services.AddRazorPages(); builder.Services.AddDbContext<SchoolContext>(options => options.UseSqlServer(builder.Configuration.GetConnection...
Entity Framework Core (EF Core) is an object-relational mapper (ORM), enabling us to work with a database using .NET objects, eliminating much of the data-access code we usually need to write. EF Core supports many databases, including SQL Server, SQLite, PostgreSQL, MySQL, and more, mak...