升級到 .net 核心 3.0 后出現錯誤“沒有找到 web 地址的網頁：https://localhost:44374/”

Question

我將具有 2 個類庫和一個 Mvc 項目的項目從 2.2 升級到 MVC Core 3.0，此頁面在此處輸入鏈接描述

1. 更改 .net <TargetFramework>netcoreapp3.0</TargetFramework>

   2.像這樣改變

   <ItemGroup> <.--<PackageReference Include="Microsoft.AspNetCore.App" />--> <.--<PackageReference Include="Microsoft.AspNetCore.Identity" Version="2.2.0" />--> <PackageReference Include="Microsoft.AspNetCore.Identity.UI" Version="3.0.0" /> <.--<PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.2.0" PrivateAssets="All" />--> <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.0.0" /> </ItemGroup>

   3.my satrtup.cs

   `
   app.UseHttpsRedirection(); app.UseStaticFiles(); app.UseDefaultFiles(); app.UseCookiePolicy();

    app.UseRouting(); app.UseAuthorization(); app.UseEndpoints(endpoints => { endpoints.MapRazorPages(); });`

2. 我的程序.cs

   公共 static void Main(string[] args) { CreateHostBuilder(args).Build().Run(); } public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args).ConfigureWebHostDefaults(webBuilder => { webBuilder.UseStartup(); });

但是當我運行我的項目時得到這個錯誤

找不到此本地主機頁面沒有找到 web 地址的網頁： https://localhost:44374/ HTTP 錯誤 404

Answer 1

在Startup.cs試試這個

public void ConfigureServices(IServiceCollection services) 
{
           //Code above . . .

            services.AddMvc( options =>
            {
                options.EnableEndpointRouting = false;
            });

            //Code below. . .
}

然后在

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            //Code above . . .

            app.UseMvcWithDefaultRoute();

            //Code below. . .
        }

並刪除

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapRazorPages();
    });`