在Blazor Server 项目中使用 EF Core Sqlite

menus = await Mmservise.GetMenuAsync(DateTime.Now);

public class MenuService
    {
 
        public  Task< List<Menu> > GetMenuAsync(DateTime startDate)
        {
 
            List<Menu> meuns = new List<Menu>();
            string[] days = new string[] { "2021-02-06", "2021-02-07", "2021-02-08" };
            var rng = new Random();
 
            foreach (string daystr in days)
            {
                Menu a = new Menu { ID = Guid.NewGuid(), Name = "红烧鱼", MenuDay = Convert.ToDateTime(daystr), DefaultNamber = 1, Price = rng.Next(5, 30), Type = "午餐" };
                Menu b = new Menu { ID = Guid.NewGuid(), Name = "大盘鸡", MenuDay = Convert.ToDateTime(daystr), DefaultNamber = 1, Price = rng.Next(5, 30), Type = "午餐" };
                Menu c = new Menu { ID = Guid.NewGuid(), Name = "烤肉", MenuDay = Convert.ToDateTime(daystr), DefaultNamber = 1, Price = rng.Next(5, 30), Type = "午餐" };
                Menu d = new Menu { ID = Guid.NewGuid(), Name = "油条豆浆", MenuDay = Convert.ToDateTime(daystr), DefaultNamber = 1, Price = rng.Next(5, 30), Type = "早餐" };
                Menu e = new Menu { ID = Guid.NewGuid(), Name = "炸酱面", MenuDay = Convert.ToDateTime(daystr), DefaultNamber = 1, Price = rng.Next(5, 30), Type = "晚餐" };
 
                meuns.Add(a);
                meuns.Add(b);
                meuns.Add(c);
                meuns.Add(d);
                meuns.Add(e);
            }
 
            return Task.FromResult(meuns);
 
        }
    }

public class BlazorApp0206Context: DbContext
    {
        public DbSet<Menu> Menus { get; set; }
 
        protected override void OnConfiguring(DbContextOptionsBuilder options)
            => options.UseSqlite("Data Source=BlazorApp0206.db");
    }

Install-Package Microsoft.EntityFrameworkCore.Tools
Add-Migration InitialCreate0209
Update-Database

public class MenuService
    {
 
        public  Task< List<Menu> > GetMenuAsync(DateTime startDate)
        {
            using (var db = new BlazorApp0206Context())
            {
                var meuns = db.Menus.ToList<Menu>();
                return Task.FromResult(meuns);
            }
        }
    }
}