小编tsh*_*ake的帖子

在where子句中获取orderby的此错误.我之所以这样做,是因为之前,如果我没有定义'人',我会在返回时收到错误,因为人们说这个名字'人'在当前的情境中并不存在.我该如何解决？

 public JsonResult PersonsList(string birthyear)
 {
     TutorialDBContext db = new TutorialDBContext();
     var NumericYear = Convert.ToInt32(birthyear);
     IQueryable people;

     if (birthyear == "All")
     {
          people = from m in db.persons
                   select m;

          people = people.OrderByDescending(s => s.birthdate);
     }
     else
     {
          people = from m in db.persons
                   where m.birthdate.Year >= NumericYear
                   where m.birthdate.Year <= (NumericYear + 9)
                   select m;
     }

     return Json(people, JsonRequestBehavior.AllowGet);
 }

我必须在此前言,我对视图模型很新.话虽这么说,我希望有一个带付款和订阅信息的创建视图,比如付款注册页面.我想在我的EF模型中更新多个实体,并且我计划通过viewmodel进行更新.问题是当我尝试根据我的控制器动作创建视图时..我收到此错误:

我的视图模型使用独立的类来GET/POST数据到我的看法......也许我会对此错误的方式.. 它必须有一个主键？它是否需要在我的数据库中并添加为EF实体？我该如何解决？谢谢

这是viewmodel代码:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MVCProject.DataAccess;
using System.ComponentModel.DataAnnotations;

namespace MVCProject.Models.ViewModel
{
    public class PaymentSetupViewModel
    {
        //Subscription.cs
        [Required(ErrorMessage = "required")]
            public string Frequency { get; set; }
            public DateTime Date { get; set; }

        //PaymentMethod.cs    
        [Required(ErrorMessage = "required")]
            [CreditCard]
            [Display(Name = "Card Number")]
            public string CCNumber { get; set; }

            [Required(ErrorMessage = "required")]
            [Display(Name = "Card Expiration")]
            public DateTime CCExpiration { get; set; }

            [Required(ErrorMessage = "required")]
            [Display(Name = "CVV2")] …

我想为mvc页面制作一个这样的模型:

public class Body
{
    public int Id { get; set; }

    public class Hand
    {
        public List<Fingers> fingers { get; set; }
    }

    public class Foot
    {
        public List<Toes> toes { get; set; }
    }

    public class Head
    {
        public Nose nose {get; set;}
        public List<Ears> ears { get; set; }
        public List<Eyes> eyes { get; set; }
    }
}

然后有一个像这样的手指类:

public class Fingers
{
    public int Id { get; set; }
    public string Description { get; set; } …

我对一个视图有两次局部。Partial 不使用循环并具有基本验证。

这是部分视图代码：

 <div class="col-md-4">
                    @Html.LabelFor(model => model.ZipCode, new { @class = "control-label " })
                    @Html.TextBoxFor(model => model.ZipCode, new { @class = "form-control ",  tabindex = "4" })
                    @Html.ValidationMessageFor(model => model.ZipCode)
                </div>

这是我的主要观点，调用它两次：

<div id="homeaddress">
                                @if (Model == null)
                                {
                                @Html.Partial("~/Views/AddrPartial.cshtml", new Address())
                            }
                            else
                            {
                                @Html.Partial("~/Views/AddrPartial.cshtml", Model.HomeAddress)
                            }
                        </div>

<div id="mailingaddress">
                                @if (Model == null)
                                {
                                    @Html.Partial("~/Views/AddrPartial.cshtml", new Address())
                                }
                                else
                                {
                                    @Html.Partial("~/Views/AddrPartial.cshtml", Model.MailingAddress)
                                }
                            </div>

然后只有“homeadrress”div 验证有效...这是我的模型的设置方式：

    public class Information
   {
    public Address HomeAddress …

这是我的代码.我基本上想看看我的模型,看看是否存在任何东西.使用三元运算符根据存在显示或隐藏.

$(document).ready(function() {
        (@Model.MyProperties.Any()) ? $('#removeall-toggle').show() : $('#removeall-toggle').hide();
    });

我在chrome dev工具中遇到错误,说:

Uncaught ReferenceError: False is not defined

我如何解决这个问题,或者这是一个更好的方法来实现这一目标？