如何在Asp.Net Core2.1项目中使用EF Core2.2.4数据库

<ItemGroup>
  <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.2.4" />
  <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.2.4" />
  <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.2.4" />
</ItemGroup>

services.AddDbContext<YourDbContext>(options =>
    options.UseSqlServer(Configuration.GetConnectionString("YourConnectionString")));

"ConnectionStrings": {
  "YourConnectionString": "Server=(localdb)\\mssqllocaldb;Database=YourDatabase;Trusted_Connection=True;MultipleActiveResultSets=true"
}

public class YourDbContext : DbContext
{
    public YourDbContext(DbContextOptions<YourDbContext> options) : base(options)
    {
    }

    public DbSet<YourEntity> YourEntities { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<YourEntity>().ToTable("YourTable");
        // 添加其他实体类和表之间的映射关系
    }
}

public class YourController : Controller
{
    private readonly YourDbContext _dbContext;

    public YourController(YourDbContext dbContext)
    {
        _dbContext = dbContext;
    }

    public IActionResult Index()
    {
        var entities = _dbContext.YourEntities.ToList();
        // 执行其他数据库操作
        return View(entities);
    }
}