更改核心应用中 Asp.Net 默认页面

我正在尝试更改 ASP.NET Core MVC C#应用程序中的起始页。我想首先将用户带到登录页面，我已经Startup.cs更改了以下内容：

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Login}/{action=Index}/{id?}");
}
}

我的控制器看起来像这样

public class LoginController : Controller
{
public IActionResult Index()
{
return View();
}
}

我有一个名为Login.cshtml的页面

我在这里错过了什么？

这是我的创业公司.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using eDrummond.Models;
namespace eDrummond
{
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
public void ConfigureServices(IServiceCollection services)
{
services.AddControllersWithViews();
services.AddDbContext<eDrummond_MVCContext>();
services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
.AddCookie(opetions =>
{
options.LoginPath = "/Login/Index";
});
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
app.UseAuthentication();
app.UseCors(
options => options.AllowAnyOrigin()
);
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Login}/{action=Index}/{id?}");
});
}
}
}

我正在使用VS2019并创建了一个 asp.net 核心应用程序，然后选择了MVC，我所做的只是脚手架表。所以配置应该是正确的吗？

您需要考虑身份验证流程。首先，您未经授权。当您访问任何未经授权的页面时，您希望重定向到您的登录页面，对吗？然后你需要告诉这个程序：

public void ConfigureServices(IServiceCollection services) {
services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
// What kind of authentication you use? Here I just assume cookie authentication.
.AddCookie(options => 
{
options.LoginPath = "/Login/Index";
});
}
public void Configure(IApplicationBuilder app) {
// Add it but BEFORE app.UseEndpoints(..);
app.UseAuthentication();
}

下面是一个堆栈溢出主题，可以解决您的问题：

ASP.NET 核心，将默认重定向更改为未经授权的

编辑：

事实证明，您可以执行以下操作：

// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
// You need to comment this out ..
// services.AddRazorPages();
// And need to write this instead:
services.AddMvc().AddRazorPagesOptions(options =>
{
options.Conventions.AddPageRoute("/Login/Index", "");
});
}

2. 编辑：

所以我的第一个答案没有错，但它不包括对所需的控制器的更改。有两种解决方案：

您将 [授权] 添加到所有控制器，您希望获得授权，例如 IndexModel(位于/Pages/Index.cshtml.cs(以及何时输入后，程序将看到，用户未获得授权，并且将重定向至/登录名/索引 (文件位于/pages/login/index.cshtml.cs(.然后，您无需指定 DefaultPolicy 或 FallbackPolicy(有关 FallbackPolicy 参考，请参阅下面的源代码(
你可以让程序说，所有的控制器都需要即使未通过[授权]标记，也已授权。但是你需要标记您想要在未经授权的情况下通过的控制器 [允许匿名]。这就是它应该如何实现：

结构：

/Pages
Index.cshtml
Index.cshtml.cs
/Login
Index.cshtml
Index.cshtml.cs
/Startup.cs

文件：

文件位于/Startup.cs：

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.Extensions.Configuration;
namespace stackoverflow_aspnetcore_59448960
{
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)
{
// Does automatically collect all routes.
services.AddRazorPages();
services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
.AddCookie(options =>
{
// That will point to /Pages/Login.cshtml
options.LoginPath = "/Login/Index";
}); ;
services.AddAuthorization(options =>
{
// This says, that all pages need AUTHORIZATION. But when a controller, 
// for example the login controller in Login.cshtml.cs, is tagged with
// [AllowAnonymous] then it is not in need of AUTHORIZATION. :)
options.FallbackPolicy = new AuthorizationPolicyBuilder()
.RequireAuthenticatedUser()
.Build();
});
}
// 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();
}
else
{
app.UseExceptionHandler("/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
// Defines default route behaviour.
endpoints.MapRazorPages();
});
}
}
}

文件位于/Pages/Login/Index.cshtml.cs：

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.Extensions.Logging;
namespace stackoverflow_aspnetcore_59448960.Pages.Login
{
// Very important
[AllowAnonymous]
// Another fact: The name of this Model, I mean "Index" need to be
// the same as the filename without extensions: Index[Model] == Index[.cshtml.cs]
public class IndexModel : PageModel
{
private readonly ILogger<IndexModel> _logger;
public IndexModel(ILogger<IndexModel> logger)
{
_logger = logger;
}
public void OnGet()
{
}
}
}

文件位于/Pages/Index.cshtml 中.cs

using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.Extensions.Logging;
namespace stackoverflow_aspnetcore_59448960.Pages
{
// No [Authorize] needed, because of FallbackPolicy (see Startup.cs)
public class IndexModel : PageModel
{
private readonly ILogger<IndexModel> _logger;
public IndexModel(ILogger<IndexModel> logger)
{
_logger = logger;
}
public void OnGet()
{
}
}
}

您应该具有如下所示的文件夹结构。

Views
Login
Index.cshtml

默认情况下，它应该带您进入登录页面。

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