尝试将新对象添加到列表时出现 404 错误 MVC

Question

我有朋友视图，我的朋友列在 table 中，如下图所示。

现在我添加了新功能添加朋友所以当我点击 Link 我得到：

The resource cannot be found. HTTP 404

这是我列出所有朋友的视图：

@using Lab3.Models
@model IEnumerable<Lab3.Models.FriendModel>

@{
    ViewBag.Title = "Friends";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Friends</h2>

@Html.ActionLink("Add Friend", "AddNewFriend", "Friend", null, new { @class = "btn btn-primary" })

<table class="table table-bordered table-hover">
    <thead>
        <tr>
            <th>Friend Id</th>
            <th>Friend Name</th>
            <th>Place</th>
            <th></th>
        </tr>
    </thead>

    <tbody>
        @foreach (FriendModel friend in Model)
        {
            <tr>
                <td>@friend.Id</td>
                <td>@friend.Ime</td>
                <td>@friend.MestoZiveenje</td>
                <td>
                    @Html.ActionLink("Edit", "EditFriend", new { id = friend.Id }, null)
                </td>
            </tr>
        }
    </tbody>

</table>

AddFriend 视图：

@model Lab3.Models.FriendModel

@{
    ViewBag.Title = "AddFriend";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>AddFriend</h2>

@using (Html.BeginForm("AddNewFriend","Friend")) 
{
    @Html.AntiForgeryToken()
    
    <div class="form-horizontal">
        <h4>FriendModel</h4>
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.Ime, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Ime, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Ime, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.MestoZiveenje, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.MestoZiveenje, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.MestoZiveenje, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

还有我的 FriendController:

using Lab3.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace Lab3.Controllers
{
    public class FriendController : Controller
    {
        private static List<FriendModel> friendModels;

        // GET: Friend
        public ViewResult Index()
        {
            var friends = GetFriends();

            return View(friends);  
        }

        public ViewResult EditFriend(byte id)
        {
            var friend = GetFriends().SingleOrDefault(f => f.Id == id);  
            return View("EditFriend",friend);
        }

        [HttpPost]
        public ActionResult AddNewFriend(FriendModel friend)    
        {
            friendModels.Add(friend);
            return View("Index", friendModels);
        }

        private IEnumerable<FriendModel> GetFriends()
        {
            return new List<FriendModel>
            {
                new FriendModel {Id = 1, Ime = "Marry", MestoZiveenje = "Dubai"},
                new FriendModel {Id = 2, Ime = "John", MestoZiveenje = "London"},
                new FriendModel {Id = 3, Ime = "Smith", MestoZiveenje = "Manchester"}
            };
        }       
    }
}

为什么我会收到此 404 错误 找不到页面？

Answer 1

问题是您的 AddNewFriend 视图没有重定向的操作，视图应该有一个带有方法 get 的操作来重定向，并且 post 方法是一次您在视图中提交表单

在您的控制器中添加以下方法应该可以解决问题

[HttpGet]
public ActionResult AddNewFriend()    
{            
     return View();
}

Answer 2

错误 404 表示无法从您的 URL.

中找到路线

在您的 Razor 页面中检查这一行

@Html.ActionLink("Edit", "EditFriend", new { id = friend.Id }, null)

你说的是，当我单击 link 时，转到 controller:"Edit" & action:"EditFriend"。这将解析为“https:///localhost/Edit/EditFriend?id=1”

但我在这里找不到 EditController，因此 link 创建了 404

试着把“Friend”放在这里，因为我们有一个“FriendController”。喜欢

@Html.ActionLink("Friend", "EditFriend", new { id = friend.Id }, null)

这将解析为“https://localhost/Friend/EditFriend?id=1”

尝试将新对象添加到列表时出现 404 错误 MVC

Getting 404 Error MVC when trying to add New Object to a List

c#

model-view-controller

asp.net-mvc

visual-studio