Question

我启动asp core应用程序时无法创建数据库，即使我之前能够在其他项目上执行此操作。

我的上下文类称为DatabaseContext

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

        public DbSet<Person> People { get; set; }
    }

DbInitializer.cs

public class DbInitializer
    {
        public static void Initialize(DatabaseContext context)
        {
            context.Database.EnsureCreated();

            if (context.People.Any())
            {
                return;   // DB has been seeded
            }

            var people = new Person[]
            {
            new Person{ FirstName = "John", LastName = "Johnson", Age = 32, Email = "john@gmail.com", Subscribed = true},
            new Person{ FirstName = "Bob", LastName = "Bobson", Age = 22, Email = "bob@gmail.com", Subscribed = false},
            new Person{ FirstName = "Sally", LastName = "Jackson", Age = 26, Email = "sally@gmail.com", Subscribed = false},
            };

            foreach (Person p in people)
            {
                context.People.Add(p);
            }
            context.SaveChanges();
        }
    }

appsettings.json

"ConnectionStrings": {
    "DefaultConnection": "Server=(localdb)\\mssqllocaldb;Database=TESTDB;Trusted_Connection=True;MultipleActiveResultSets=true"
  },

Startup.cs

public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<DatabaseContext>(options =>
        options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
            services.AddMvc();
        }


Program.cs

public static void Main(string[] args)
        {
            //BuildWebHost(args).Run();

            var host = BuildWebHost(args);

            using (var scope = host.Services.CreateScope())
            {
                var services = scope.ServiceProvider;
                try
                {
                    var context = services.GetRequiredService<DatabaseContext>();
                    DbInitializer.Initialize(context);
                }
                catch (Exception ex)
                {
                    var logger = services.GetRequiredService<ILogger<Program>>();
                    logger.LogError(ex, "An error occurred while seeding the database.");
                }
            }
            host.Run();
        }

当我运行应用程序时，我没有在Users文件夹中创建数据库文件，也没有在SQL Server Object Explorer

中看到它

数据库未创建

0 个答案: