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c# - .NET 核心 2.2。尝试删除时如何摆脱此 HTTP 405 错误？

问题描述

尝试使用删除进行简单发布时出现 405 错误。我可以很好地读取、写入和更新，但无法弄清楚为什么 Visual Studio 2017（或者，更具体地说，IIS Express）不允许我执行删除。

互联网上有很多关于 的帖子web.config，但它们是较旧的帖子，较新的帖子不起作用。事实上，我相信web.config我的项目中没有包含因为微软正在朝着.appsettings.json

我在 Docker 容器中运行带有 .NET Core 2.2 的 Visual Studio 2017 v15.9.11。我没有运气切换到 IIS Express。我已经查看了applicationhost.configIIS Express 的文件，并且 WebDav 已经被注释掉了。我相信它发生在 Web 服务器级别，因为在调试时我没有受到控制器的影响。我最好的猜测是某处的默认设置不允许删除；我就是找不到。

模型

namespace Efficacy.Models.Entities
{
    /* dbo.Contact.Contact */
    public class Contact
    {
        private const string V = "First Name";

        public int Id { get; set; }
        public ContactType ContactType { get; set; }
        public int ContactTypeId { get; set; }

        [Required]
        //[Display( Description = ("Delete")]
        public string FirstName { get; set; }
        public string MiddleName { get; set; }
        [Required]
        public string LastName { get; set; }
    }
}

数据库上下文

namespace Efficacy.Data
{
    public class EfficacyDBContext : DbContext
    {
        public virtual DbSet<Contact> Contact { get; protected set; }
        public virtual DbSet<ContactType> ContactType { get; protected set; }
        public virtual DbSet<HelloNurse> HelloNurse { get; protected set; }

        public EfficacyDBContext(DbContextOptions options) : base(options)
        {
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.ApplyConfiguration(new ContactEntityTypeConfiguration());
            modelBuilder.ApplyConfiguration(new ContactTypeEntityTypeConfiguration());
        }
    }
}

控制器

namespace Efficacy.Areas.Ops.Controllers
{
    [Area("Ops")]
    public class ContactController : Controller
    {
        private readonly EfficacyDBContext _db;

        public ContactController(EfficacyDBContext db)
        {
            _db = db;
        }

        [HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> ContactDelete(int id)
        {
            var contact = await _db.Contact.FindAsync(id);

            if (contact == null)
            {
                return NotFound();
            }

            _db.Contact.Remove(contact);
            await _db.SaveChangesAsync();

            return RedirectToAction(nameof(Index));
        }
…

看法

@model Efficacy.Models.Entities.Contact
@{
    ViewData["Title"] = "Add Contact";
    Layout = "~/Views/Shared/_Layout.cshtml";
}
<div class="container-fluid">
    <div class="row">
        <div class="col-6">
            <h2 class="text-info">Add Contact</h2>
        </div>
        <div class="col-6 text-right">
            &nbsp
        </div>
    </div>
    <div>
        <form method="post" asp-area="Ops" asp-controller="Contact"  
                asp-action="ContactDelete">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <table class="table table-striped border shadow p-3 mb-5 bg-white rounded">
                <tr class="table-secondary">
                    <th><label asp-for="FirstName">First Name</label></th>
                    <th><label asp-for="MiddleName">Middle</label></th>
                    <th><label asp-for="LastName">Last Name</label></th>
                    <th><label asp-for="ContactTypeId">Contact Type</label></th>
                    <th class="text-right">&nbsp;</th>
                </tr>
                <tr>
                    <td>
                        <input asp-for="FirstName" class="form-control"
                               value="@Model.FirstName" />
                        <span asp-validation-for="FirstName"
                              class="text-danger"></span>
                    </td>
                    <td>
                        <input asp-for="MiddleName" class="form-control"
                               value="@Model.MiddleName" />
                        <span asp-validation-for="FirstName"
                              class="text-danger"></span>
                    </td>
                    <td>
                        <input asp-for="LastName" class="form-control"
                               value="@Model.LastName" />
                        <span asp-validation-for="FirstName"
                              class="text-danger"></span>
                    </td>
                    <td>
                        @* TODO:  Bind *@
                        <select name="ContactTypeId" class="form-control">
                            <option value="1">Organization</option>
                            <option value="2">Lead</option>
                            <option value="3">Event</option>
                            <option value="4">Invoice</option>
                            <option value="5">Contact</option>
                        </select>
                    </td>
                    <td class="text-right">
                        <input type="submit" class="btn btn-info form-control mb-1"
                               asp-route-id="@Model.Id" value="Save" />
                        <a asp-area="ops" asp-controller="Contact"
                           asp-action="ContactDelete" asp-route-id="@Model.Id"
                           class="btn btn-danger form-control mb-1">Delete</a>
                        <a asp-action="Index"
                           class="btn btn-success form-control">Cancel</a>
                    </td>
                </tr>
            </table>
        </form>
    </div>
</div>

控制台输出

Microsoft.AspNetCore.Hosting.Internal.WebHost:Information: Request starting HTTP/1.1 GET https://localhost:44382/Ops/Contact/ContactDelete/11  
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET https://localhost:44382/Ops/Contact/ContactDelete/11  
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
      Executing endpoint '405 HTTP Method Not Supported'
Microsoft.AspNetCore.Routing.EndpointMiddleware:Information: Executing endpoint '405 HTTP Method Not Supported'
Microsoft.AspNetCore.Routing.EndpointMiddleware:Information: Executed endpoint '405 HTTP Method Not Supported'
[40m[32minfo[39m[22m[49m: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
      Executed endpoint '405 HTTP Method Not Supported'
Microsoft.AspNetCore.Hosting.Internal.WebHost:Information: Request finished in 14.0081ms 405

启动.cs

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

标签： c#asp.net-coreiis-expressasp.net-core-2.2

解决方案

405HTTP 代码意味着Method Not Allowed. Served 返回此错误，因为操作需要POST请求（因为它已标记为[HttpPost]），并且当用户单击锚标记 ( <a>) 时，浏览器会发送GET请求。为了发送POST，您需要使用form标签

<form method="post" asp-action="ContactDelete" asp-area="Ops" asp-controller="Contact">
    <input name="Id" value="@item.Id" type="hidden" /> <!-- hidden input contains Id value -->
    <button type="submit">Delete</button>
</form>

您还具有[ValidateAntiForgeryToken]该操作的属性，因此需要发送防伪令牌。FormTagHelper会自动为您生成隐藏input的令牌，因此您无需执行任何其他操作。

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