一个应用程序始于ASP.NET Core 2.0（我认为），然后迁移到2.1，然后迁移到2.2，现在我正在尝试并且无法将其迁移到3.0 ...
我阅读并尝试应用official migration docs中的说明，据此，我应该（除其他外）将services.AddMvc()替换为services.AddRazorPages()，将app.UseMvc()替换为{{ 1}}（如果我使用的是Razor Pages）。据我所知，我一直在使用Razor Pages，而从未使用过完整的MVC，所以我就是这样做的。
现在，以前可用的URL返回HTTP 404而不是任何内容...
例如，app.UseEndpoints(endpoints => {endpoints.MapRazorPages();})或/路由可以做到这一点，即使在项目目录中既有/Index文件又有Pages/Index.cshtml文件。 （虽然很奇怪：也许只是索引网址失败了-我只是尝试将浏览器指向Pages/Index.cshtml.cs才有效！）
/Error内容（与工作版本相同）：
Pages/Index.cshtml.cs using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using system.web;
using microsoft.AspNetCore.Mvc;
using microsoft.AspNetCore.Mvc.RazorPages;
using Mon.Battle;
namespace mon.Pages
{
public class IndexModel : PageModel
{
public IndexModel(IBattleManager battleManager)
{
// I hope I don't have to lock this dict here,I'm only reading
configurationSerialized = battleManager.configurationSerialized;
}
public ConfigurationSerializedFormat configurationSerialized;
public void OnGet()
{
}
}
}
也包含一些内容，但是它太长且太乱，无法将其作为一个整体发布在这里...但是它肯定应该返回某些内容，并且它是在返回之前迁移到3.0。
Pages/Index.cshtml顶部的页面指令足够简短：
Index.cshtml不幸的是，这些必须与迁移前的版本有所不同：即由于3.0删除了Newtonsoft.JSON，我不得不用@* TODO: The site becomes ugly :( Should I start using Bootstrap,instead of trying to handcraft CSS? *@
@* Hey... I actually start to like how the site looks :) *@
@page
@using System.Text.Encodings.Web
@using microsoft.Extensions.Configuration
@inject JavaScriptEncoder jsencoder
@inject IConfiguration conf
@using static System.Text.Json.JsonSerializer
@model IndexModel
@{
Layout = null;
}
替换它。
我目前的System.Text.Json（我认为我正是按照上述文档中的说明操作的）：
Startup.cs上一个using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using microsoft.AspNetCore.Builder;
using microsoft.AspNetCore.Identity;
using microsoft.AspNetCore.Hosting;
using microsoft.AspNetCore.Http;
using microsoft.AspNetCore.HttpsPolicy;
using microsoft.EntityFrameworkCore;
using mon.Data;
using microsoft.Extensions.Configuration;
using microsoft.Extensions.DependencyInjection;
using microsoft.Extensions.Hosting;
using Mon.Chat;
using Mon.MatchMaker;
using Mon.Battle;
using Mon.Player;
namespace mon
{
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.Configure<CookiePolicyOptions>(options =>
{
// This lambda determines whether user consent for non-essential cookies is needed for a given request.
options.CheckConsentNeeded = context => true;
options.MinimumSameSitePolicy = SameSiteMode.None;
});
services.Configure<IdentityOptions>(options =>
{
options.User.AllowedusernameCharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
});
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(
Configuration.getconnectionString("DefaultConnection")));
services.AddDefaultIdentity<ApplicationUser>().AddRoles<IdentityRole>()
.AddEntityFrameworkStores<ApplicationDbContext>();
services.AddRazorPages();
services.AddSignalR();
services.AddSingleton<IBattleManager,BattleManager>();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app,IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
app.UseDatabaseErrorPage();
}
else
{
app.UseExceptionHandler("/Error");
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticfiles();
app.UseRouting();
app.UseAuthentication();
app.UseEndpoints(endpoints =>
{
endpoints.MapHub<ChatHub>("/chathub");
endpoints.MapHub<MatchMakerHub>("/mmrhub");
endpoints.MapHub<BattleHub>("/battlehub");
endpoints.MapRazorPages();
});
}
}
}
：
Startup.cs我在做什么错？我错过了什么？为什么using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using microsoft.AspNetCore.Builder;
using microsoft.AspNetCore.Identity;
using microsoft.AspNetCore.Hosting;
using microsoft.AspNetCore.Http;
using microsoft.AspNetCore.HttpsPolicy;
using microsoft.AspNetCore.Mvc;
using microsoft.EntityFrameworkCore;
using mon.Data;
using microsoft.Extensions.Configuration;
using microsoft.Extensions.DependencyInjection;
using Mon.Chat;
using Mon.MatchMaker;
using Mon.Battle;
using Newtonsoft.Json.Serialization;
using Mon.Player;
namespace mon
{
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.Configure<CookiePolicyOptions>(options =>
{
// This lambda determines whether user consent for non-essential cookies is needed for a given request.
options.CheckConsentNeeded = context => true;
options.MinimumSameSitePolicy = SameSiteMode.None;
});
services.Configure<IdentityOptions>(options =>
{
options.User.AllowedusernameCharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
});
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(
Configuration.getconnectionString("DefaultConnection")));
services.AddDefaultIdentity<ApplicationUser>().AddRoles<IdentityRole>()
.AddEntityFrameworkStores<ApplicationDbContext>();
services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
services
.AddSignalR()
.AddJsonProtocol(options =>
{
options.PayloadSerializerSettings.ContractResolver = new DefaultContractResolver();
});
services.AddSingleton<IBattleManager,IHostingEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
app.UseDatabaseErrorPage();
}
else
{
app.UseExceptionHandler("/Error");
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticfiles();
app.UseCookiePolicy();
app.UseAuthentication();
app.UseSignalR(routes =>
{
routes.MapHub<ChatHub>("/chathub");
routes.MapHub<MatchMakerHub>("/mmrhub");
routes.MapHub<BattleHub>("/battlehub");
});
app.UseMvc();
}
}
}
返回HTTP 404？
如果您需要其他信息，我会提供。