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我正在构建一个Asp.Net核心应用程序并尝试播种数据库。我已经编写了在我的Startup.cs Configure方法中启动种子的逻辑。当我放置一个断点并按下F5时，我无法调试。它似乎达到了断点。任何人都可以指出我错过了什么。我的种子逻辑也有问题吗？如果你可以看到有一个对context.EnsureSeedData（context）的调用。该应用程序似乎disonnect并获得以下错误信息无法调试Startup.cs中的配置方法
此网站无法到达.localhost拒绝连接。
我使用IISExpress
Startup.cs文件中配置方法
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IApplicationLifetime appLifetime)
{
using (var serviceScope = app.ApplicationServices.GetRequiredService<IServiceScopeFactory>().CreateScope())
{
var context = serviceScope.ServiceProvider.GetService<CustomerOrderEntities>();
context.Database.Migrate();
context.EnsureSeedData(context);
}
loggerFactory.AddConsole(Configuration.GetSection("Logging"));
loggerFactory.AddDebug();
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
app.UseWebpackDevMiddleware(new WebpackDevMiddlewareOptions {
HotModuleReplacement = true
});
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
routes.MapSpaFallbackRoute(
name: "spa-fallback",
defaults: new { controller = "Home", action = "Index" });
});
// If you want to dispose of resources that have been resolved in the
// application container, register for the "ApplicationStopped" event.
appLifetime.ApplicationStopped.Register(() => this.ApplicationContainer.Dispose());
}
EnsureSeedData方法
public void EnsureSeedData(CustomerOrderEntities context)
{
if (!context.Customers.Any())
{
context.State.AddRange(
new State { Abbreviation = "AL", Name = "Alabama" },
new State { Abbreviation = "AK", Name = "Alaska" },
new State { Abbreviation = "AZ", Name = "Arizona" },
new State { Abbreviation = "AR", Name = "Arkansas" },
new State { Abbreviation = "OH", Name = "Ohio" });
context.SaveChanges();
context.Customers.AddRange(
new Customers { FirstName = "Jade", LastName = "Lawrence", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 1 },
new Customers { FirstName = "Jack", LastName = "Robinson", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 2 },
new Customers { FirstName = "Dan", LastName = "Cruise", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 2 },
new Customers { FirstName = "Tom", LastName = "Menon", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 1 },
new Customers { FirstName = "Mike", LastName = "Tyson", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 3 },
new Customers { FirstName = "Ben", LastName = "Jones", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 2 },
new Customers { FirstName = "Mark", LastName = "Foreman", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 2 },
new Customers { FirstName = "Henry", LastName = "Canvedalle", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 3 },
new Customers { FirstName = "Blake", LastName = "Walter", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 4 },
new Customers { FirstName = "David", LastName = "Beckham", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 4 },
new Customers { FirstName = "Joe", LastName = "Strand", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 4 },
new Customers { FirstName = "Jammie", LastName = "Oliver", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 3 },
new Customers { FirstName = "Ben", LastName = "Affleck", Gender = Gender.Male, Email = "[email protected]", Address = "ABC Farms", City = "London", StateId = 3 });
context.SaveChanges();
}
}
种子初始化加入的配置方法结束Startup.cs文件：https://docs.microsoft.com/en-us/aspnet/core/tutorials/first-mvc-app/working-with-sql – Alexan