REST-Api 不工作 ControllerBase - 404 错误（C# .Net Core）

Question

我正在尝试为我的 C# 和 .Net Core Web 应用程序设置 Rest-API。在使用标准 ASP.NET 核心 Web 应用程序模板并使用 API 控制器和 read/write 操作向包中添加控制器时，我认为 URL：https://localhost :5001/api/values 会给我回复。相反，它 returns 一个错误 (404)。

ValuesController.cs代码：

using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

// For more information on enabling Web API for empty projects, visit 
https://go.microsoft.com/fwlink/?LinkID=397860

namespace CSharp_met_database.Controllers
{
[Route("api/[controller]")]
[ApiController]
public class ValuesController : ControllerBase
{
    // GET: api/<ValuesController>
    [HttpGet]
    public IEnumerable<string> Get()
    {
        return new string[] { "value1", "value2" };
    }

    // GET api/<ValuesController>/5
    [HttpGet("{id}")]
    public string Get(int id)
    {
        return "value";
    }

    // POST api/<ValuesController>
    [HttpPost]
    public void Post([FromBody] string value)
    {
    }

    // PUT api/<ValuesController>/5
    [HttpPut("{id}")]
    public void Put(int id, [FromBody] string value)
    {
    }

    // DELETE api/<ValuesController>/5
    [HttpDelete("{id}")]
    public void Delete(int id)
    {
    }
  }
}

也许我遗漏了什么，因为我是 C# 和 .Net Core 的新手。

编辑

Startup.cs代码：

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 System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace CSharp_met_database
{
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.AddRazorPages();
    }

    // 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 =>
        {
            endpoints.MapRazorPages();
        });
    }
  }
}

Answer 1

在 Startup#ConfigureServices 中，请添加

services.AddControllers()

紧接着

services.AddRazorPages();

在 Startup#Configure 中，添加

endpoints.MapControllers();

紧接着

endpoints.MapRazorPages();

Answer 2

在您的 Startup.cs 中，您缺少 ConfigureServices 中的控制器调用，如下所示：

public void ConfigureServices(IServiceCollection services)
    {
        services.AddRazorPages();
        services.AddControllers();
    }

在配置方法中也遗漏了它：

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 =>
        {
            endpoints.MapRazorPages();
            endpoints.MapControllers();
        });
    }

REST-Api 不工作 ControllerBase - 404 错误（C# .Net Core）

REST-Api not working ControllerBase - 404 error (C# .Net Core)

.net

c#

model-view-controller

controller

asp.net-core