PUT Ajax 請求返回 404 未找到 asp.net MVC

Question

我是 asp.net MVC 的新手，我正在制作一個項目，就像堆棧溢出一樣。 在此，我只想使用 ajax 系統來支持或反對答案。 所以，我可以在不刷新頁面的情況下顯示計數器的增加和減少。 I have default scaffolding one controller of Question in the controller and in which I have QuitionDetails method which is responsible for the QuitionDetailsView and in this view I am making ajax request to my API controller VotesController when the user clicks on the up-vote or down-投票。 但我收到了這個錯誤

jquery-3.3.1.js:9600 PUT https://localhost:44389/Question/QuestionDetails/api/votes/3 404 not found
send @ jquery-3.3.1.js:9600
ajax @ jquery-3.3.1.js:9206
(anonymous) @ 2:230
dispatch @ jquery-3.3.1.js:5183
elemData.handle @ jquery-3.3.1.js:4991

這是我的第一個默認腳手架Question

public ActionResult QuestionDetails(int Id)
        {
            QuestionDetailViewModel questionDetailViewModel = new QuestionDetailViewModel
            {
                Question = QBL.GetQuestions(Id),
                UserId = User.Identity.GetUserId(),
                QuestionId = Id,
            };
            return View(questionDetailViewModel);
        }
        [HttpPost]
        [ValidateInput(false)]
        public ActionResult QuestionDetails(QuestionDetailViewModel questionDetailViewModel)
        {
            QBL.CreateAnswer(questionDetailViewModel);
            return RedirectToAction("QuestionDetails", new { Id = questionDetailViewModel.QuestionId });
        }

查看代碼如下

@model AskMe.Models.ViewModel.QuestionDetailViewModel

@{
    ViewBag.Title = "QuestionDetails";
}

<h1>Question Details: </h1>
<h3>@Model.Question.Post.Title</h3>
@Html.Raw(Model.Question.Post.Content)
<hr />
<h3>Answers:</h3>
@foreach (var answer in Model.Question.Answers)
{
    <div class="card bg-light m-1">
        <div class="card-body">
            <h5 class="card-title">Answered by: @answer.Post.CreatedBy.UserName</h5>
            @Html.Raw(answer.Post.Content)
        </div>
        <div id="vote" class="col">
            <div>
                <button data-vote-id="@answer.Post.PostId" class="nav-link thumbs-up" href=""><i class="fa fa-thumbs-up" aria-hidden="true"></i></button>
            </div>
            <div>

            </div>
            <div>
                <button data-vote-id="@answer.Post.PostId" class="nav-link thumbs-down" href=""><i class="fa fa-thumbs-down" aria-hidden="true"></i></button>
            </div>
        </div>
    </div>
}
@using (Html.BeginForm())
{

    @Html.AntiForgeryToken()

    <div class="form-horizontal">
        <h3>Contribute your answer: </h3>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })

        <div class="form-group">
            @Html.LabelFor(m => m.AnswerContent, new { @class = "col-md-2 control-label" })
            <div class="col-md-10">
                @Html.TextAreaFor(m => m.AnswerContent, new { @class = "form-control" })
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                @Html.HiddenFor(m => m.UserId)
                @Html.HiddenFor(m => m.QuestionId)
                <input type="submit" value="Contribute now" class="btn btn-outline-primary" />
            </div>
        </div>
    </div>
}
@section Scripts {
    @Scripts.Render("~/bundles/jqueryval");

    <script type="text/javascript">
        $(document).ready(function () {
            tinyMCE.init({
                mode: "textareas",
            });

            $("#vote").on("click",".thumbs-up", function () {
                console.log("in selection func");
                $.ajax({                   
                url: "api/vote/" + $(this).attr("data-vote-id"),
                method: "PUT",
                success: function () {
                    console.log("success");
                }
            })
        })

        });
    </script>

}

這是我的votes API controller 代碼

using AskMe.Models;
using Microsoft.AspNet.Identity;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;

namespace AskMe.API
{
    public class VotesController : ApiController
    {
        ApplicationDbContext _context = new ApplicationDbContext();

        [HttpPut]
        public IHttpActionResult UpVote(int postId)
        {
            var userId = User.Identity.GetUserId();
            var user = _context.Users.Find(userId);
            var post = _context.Posts.Find(postId);
            var votes = post.Votes.ToList();
            if (votes.FindAll(u => u.UserId == userId).Count == 0)
            {
                Votes vote = new Votes
                {
                    VotedDateTime = DateTime.Now,
                    UserId = userId,
                    User = user,
                    Post = post,
                    PostId = postId,
                };
                post.Votes.Add(vote);
                _context.SaveChanges();
                return Ok();
            }
            return BadRequest();
        }
    }
}

I am not sure my api link should be like this https://localhost:44389/Question/QuestionDetails/api/votes/3 or https://localhost:44389/api/votes/3 and my route config is routes.MapRoute( name: "Default", url: "{controller}/{action}/{id}", defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional } );

Answer 1

如果您沒有更改標准路由，則需要在 ajax 調用中包含操作/方法名稱。

嘗試：

url: "api/vote/upvote/" + $(this).attr("data-vote-id")

您的路線配置應如下所示：

            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );

如果您將 MVC5 與 WebApi 一起使用，這是我的猜測，您必須小心。 有關如何執行此操作的更多信息，請參閱此帖子。

Answer 2

實際上你的錯誤告訴了一切。 當您請求“UpVote”操作時，它正在查看“basepath(localhost)/controller/action/Api/etc”。 它不會退出。 您必須為https://localhost:44389/API/Votes/UpVote/3創建請求

Answer 3

If you want to call controller action from ajax, you have to mention the controller name and action method in url section of ajax call.