[尝试进行带删除的简单帖子时出现405错误。我可以很好地进行读取，写入和更新，但是无法弄清楚为什么Visual Studio 2017（或者更具体地讲是IIS Express）不允许我执行删除操作。
[Internet上有很多关于web.config的帖子，但它们是较旧的帖子，而较新的帖子则无效。实际上，我认为我的项目中没有包含web.config，因为我相信Microsoft正在朝appsettings.json迈进。
我正在Docker容器中运行带有.NET Core 2.2的Visual Studio 2017 v15.9.11。我没有运气就切换到了IIS Express。我已经查看了IIS Express的applicationhost.config文件，并且WebDav已被注释掉。我相信这是在Web服务器级别上发生的，因为调试时我对控制器没有任何影响。我最好的猜测是某处不允许删除的默认设置。我只是找不到它。
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; }
}
}
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());
}
}
}
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));
}
…
@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">
 
</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"> </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>
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
app.UseMvc(routes =>
{
routes.MapRoute(
name: "areas",
template: "{area=Ops}/{controller=Home}/{action=Index}/{id?}");
});
405 HTTP代码表示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]），并且当用户单击定位标记（<a>）时浏览器发送了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>
而且您在操作上具有[ValidateAntiForgeryToken]属性，因此需要发送防伪令牌。 FormTagHelper会自动为您生成带有此令牌的隐藏的input，因此您无需执行其他任何操作。
我相信您的问题是路由问题你可以试试这个吗？
[HttpPost("id")] <----------
[ValidateAntiForgeryToken]
public async Task<IActionResult> ContactDelete([FromRoute(Name = "id" )] 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));
}
使用POST方法时，最好在表单范围内的隐藏元素中包含“ id”，然后将其与其他值一起发送：
<input type="hidden" asp-for="@Model.Id" />
我看到您正在尝试更新和删除相同的表单。那么您应该使用两个具有不同操作的Submit按钮
<button type="submit" asp-action="Save" asp-controller="Contact" asp-area="Ops" class="btn form-control">
<span>Update</span>
</button>
<button type="submit" asp-action="ContactDelete" asp-controller="Contact" asp-area="Ops" class="btn form-control">
<span>Delete</span>
</button>
还有一件事...删除表单元素中的Controller，Action和Area标记，并让提交按钮处理该问题：
<form asp-action="" method="post" enctype="multipart/form-data">