向数据库中添加种子数据

在Models目录下添加SeedData类

using Microsoft.EntityFrameworkCore;
using MvcMovie.Data;

namespace MvcMovie.Models
{
    public static class SeedData
    {
        public static void Initialize(IServiceProvider serviceProvider)
        {
            using(var context=new MvcMovieContext(serviceProvider.GetRequiredService<DbContextOptions<MvcMovieContext>>()))
            {
                if(context.Movie.Any())
                {
                    return;//Movie表已经有数据了
                }
                context.Movie.AddRange(
               new Movie
               {
                   Title = "When Harry Met Sally",
                   ReleaseDate = DateTime.Parse("1989-2-12"),
                   Genre = "Romantic Comedy",
                   Price = 7.99M
               },
               new Movie
               {
                   Title = "Ghostbusters ",
                   ReleaseDate = DateTime.Parse("1984-3-13"),
                   Genre = "Comedy",
                   Price = 8.99M
               },
               new Movie
               {
                   Title = "Ghostbusters 2",
                   ReleaseDate = DateTime.Parse("1986-2-23"),
                   Genre = "Comedy",
                   Price = 9.99M
               },
               new Movie
               {
                   Title = "Rio Bravo",
                   ReleaseDate = DateTime.Parse("1959-4-15"),
                   Genre = "Western",
                   Price = 3.99M
               }
           );
                context.SaveChanges();
            }
        }
    }
}

在Program中添加以下代码：

var app = builder.Build();
using (var scope = app.Services.CreateScope())
{//向数据库添加种子数据
    var services = scope.ServiceProvider;
    SeedData.Initialize(services);
}