ASP.Net MVC4无法对空引用执行运行时绑定

Question

我遇到了这个问题，并一直在举报，并且已经检查了每个文件。 只想看看是否有人可以发现错误？

@{
ViewBag.Title = "Event List";
}

<div>

Event Name : @Model.item.eventname <br />
Event Date : @Model.item.date <br />
Event Town : @Model.item.town <br />
Event Country : @Model.item.country <br />
Event Description : @Model.item.description <br />
Event Report : @Model.item.report <br />

@Html.ActionLink("Add New Event" , "AddEvent")


 @*Html.Partial("EventList")*@

</div>

感谢所有回复！

贝娄是事件模型，它链接到原始帖子：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;

namespace NETCW.Models
{
public class Event
{
    public int EventID { get; set; }

    [Required(ErrorMessage = "Please enter the event name.")]
    public string eventname { get; set; }

    [Required(ErrorMessage = "Please enter the event date.")]
    public string date { get; set; }

    [Required(ErrorMessage = "Please enter the event town.")]
    public string town { get; set; }

    [Required(ErrorMessage = "Please enter the event country.")]
    public string country { get; set; }

    [Required(ErrorMessage = "Please enter the event description.")]
    public string description { get; set; }

    [Required(ErrorMessage = "Please enter the event report.")]
    public string report { get; set; }

}
}

请参阅下面的波纹管编辑，我得到一个错误，它说它不包含以下日期，镇，国家和报告的定义：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;

namespace NETCW.Models
{
public class Event
{
    public int EventID { get; set; }

    [Required(ErrorMessage = "Please enter the event name.")]
    [Display (Name = "Event Name :")]
    public string eventname { get; set; }

    [Required(ErrorMessage = "Please enter the event date.")]
    [Display (Date = "Event Date :")]
    public string date { get; set; }

    [Required(ErrorMessage = "Please enter the event town.")]
    [Display (Town = "Event Town :")]
    public string town { get; set; }

    [Required(ErrorMessage = "Please enter the event country.")]
    [Display (Country = "Event Country :")]
    public string country { get; set; }

    [Required(ErrorMessage = "Please enter the event description.")]
    [Display (Description = "Event Description :")]
    public string description { get; set; }

    [Required(ErrorMessage = "Please enter the event report.")]
    [Display (Report = "Event Report :")]
    public string report { get; set; }

}
}

Answer 1

您尚未在视图中声明要建模。 在视图顶部，您需要对其进行声明

@model NETCW.Models.Event

编辑

基于已编辑的问题，由于Event不包含名为item的属性，因此@Model.item.eventname也将失败。 另外，您需要将模型传递给视图，并且应该使用htlm帮助器生成元素。 在GET方法中

Event model = new Event();
return View(model);

并认为

@Html.DisplayFor(m => m.eventname)

并且如果您的媒体资源装饰有[Display(Name = "Event Name:")]则可以使用以下内容生成关联的标签

@Html.DisplayNameFor(m => m.eventname)