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我正在構建一個Asp.Net核心應用程序並嘗試播種數據庫。我已經編寫了在我的Startup.cs Configure方法中啓動種子的邏輯。當我放置一個斷點並按下F5時，我無法調試。它似乎達到了斷點。任何人都可以指出我錯過了什麼。我的種子邏輯也有問題嗎？如果你可以看到有一個對context.EnsureSeedData（context）的調用。該應用程序似乎disonnect並獲得以下錯誤信息無法調試Startup.cs中的配置方法
此網站無法到達.localhost拒絕連接。
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();
}
}
種子初始化加入的配置方法結束Startup.cs文件：https://docs.microsoft.com/en-us/aspnet/core/tutorials/first-mvc-app/working-with-sql – Alexan