Question

我在用户页面上创建了一个表格，其中显示了他们所关注的所有餐馆。但是当我运行页面时，我收到错误Object reference not set to an instance of an object.对于行

@foreach (var RestaurantSearch in Model.RestaurantSearch)

是否应该以不同的方式编写此代码？

个人资料页面代码

@foreach (var RestaurantSearch in Model.RestaurantSearch)
        {
            var manager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(new ApplicationDbContext()));
            var currentUser = manager.FindById(User.Identity.GetUserId());
            if (RestaurantSearch.User1ID == @currentUser.Id)
            { 
            <tr>
                <td>
                    @Html.DisplayFor(modelItem => RestaurantSearch.RestaurantID)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => RestaurantSearch.User1ID)
                </td>
                <td>

                    @Html.ActionLink("Details", "Details", "Restaurant", new { id = RestaurantSearch.RestaurantID }, null) |

                </td>
            </tr>
        }
        }

    </table>

Followviewmodel

public class Followviewmodel
    {
        public IEnumerable<BiteWebsite.Models.Followuser> UserSearch { get; set; }
        public IEnumerable<BiteWebsite.Models.FollowRestaurant> RestaurantSearch { get; set; }



        public string Name { get; set; }

        public string Cuisine { get; set; }

        public string FirstName { get; set; }

        public string LastName { get; set; }

        public string UserName { get; set; }
    }

Answer 1

您的Model或Model.RestaurantSearch为空。您必须在Controller操作中设置它。

样品：

public ActionResult Index()
{
    Followviewmodel model = new Followviewmodel();

    // fill in the fields
    model.RestaurantSearch = ...

    return View(model);
}

对象引用未设置为对象的实例asp.net c＃

1 个答案: