Question

我最近进入了ASP.NET Core，并且正在阅读一些文档，但是有一件事情使我无法找到解决方案。运行我的应用程序时，在控制台中出现以下错误：

未声明纯文本文档的字符编码。该文档将在某些浏览器中呈现乱码如果文档包含来自外部的字符，则配置 US-ASCII范围。文件的字符编码需要为在传输协议或文件中声明的字节需要使用字节顺序标记为编码签名。

当我搜索此错误时，我看到消息指出应该将基本编码声明添加到文档头。那是有道理的，但是没有用。

<meta http-equiv="content-type" content="text/html; charset=utf-8" />

这是我当前的设置：

HomeController

using Microsoft.AspNetCore.Mvc;
using Senua.Models;
using System.Diagnostics;

namespace Senua.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Index()
        {
            return View();
        }
        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }
    }
}

视图/主页/Index.cshtml

@{
    ViewData["Title"] = "Index";
}

<h2>Index</h2>

视图/共享/布局

为简洁起见，我已将其简化。

<!DOCTYPE html>
<html>
<head>

    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="content-type" content="text/html; charset=utf-8" />
    <title>@ViewData["Title"] - WebApplication1</title>

    <environment include="Development">
        <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.css" />
        <link rel="stylesheet" href="~/css/site.css" />
    </environment>
    <environment exclude="Development">
        <link rel="stylesheet" href="https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.7/css/bootstrap.min.css"
              asp-fallback-href="~/lib/bootstrap/dist/css/bootstrap.min.css"
              asp-fallback-test-class="sr-only" asp-fallback-test-property="position" asp-fallback-test-value="absolute" />
        <link rel="stylesheet" href="~/css/site.min.css" asp-append-version="true" />
    </environment>
</head>
<body>
    <partial name="_CookieConsentPartial" />
    <div class="container body-content">
        @RenderBody()
    </div>

    <environment include="Development">
        <script src="~/lib/jquery/dist/jquery.js"></script>
        <script src="~/lib/bootstrap/dist/js/bootstrap.js"></script>
        <script src="~/js/site.js" asp-append-version="true"></script>
    </environment>
    <environment exclude="Development">
        <script src="https://ajax.aspnetcdn.com/ajax/jquery/jquery-3.3.1.min.js"
                asp-fallback-src="~/lib/jquery/dist/jquery.min.js"
                asp-fallback-test="window.jQuery"
                crossorigin="anonymous"
                integrity="sha384-tsQFqpEReu7ZLhBV2VZlAu7zcOV+rXbYlF2cqB8txI/8aZajjp4Bqd+V6D5IgvKT">
        </script>
        <script src="https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.7/bootstrap.min.js"
                asp-fallback-src="~/lib/bootstrap/dist/js/bootstrap.min.js"
                asp-fallback-test="window.jQuery && window.jQuery.fn && window.jQuery.fn.modal"
                crossorigin="anonymous"
                integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa">
        </script>
        <script src="~/js/site.min.js" asp-append-version="true"></script>
    </environment>

    @RenderSection("Scripts", required: false)
</body>
</html>

Views / ViewStart.cshtml

@{
    Layout = "_Layout";
}

Views / ViewIMports.cshtml

@using Senua
@using Senua.Models
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

Startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Senua.DAL;

namespace Senua
{
    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.AddDbContext<LocalContext>(opt => opt.UseSqlServer(Configuration.GetConnectionString("Melina")));
            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseMvc();
        }
    }
}

简而言之，这就是设置。据我所知，ViewStart定义了布局，该布局应交付文档设置，然后渲染器就位以从主页交付内容。 Home具有返回视图的控制器和方法。我想念什么？

非常感谢

Answer 1

我做了一些代码检查，发现问题来自Startup.cs。虽然我已定义app.UseMVC()，但尚未为默认路径设置路由。更改此设置使我可以使用视图，并且可以正确访问控制器。

Startup.cs（原始）

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseMvc();
        }

Startup.cs（修订）

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });
        }

为什么我的ASP.NET Core View出现编码错误？

1 个答案: