Question

我的以下MVC2认为,这种观点被严格归类为“观点”,“观点”包含一份从一个表格中得出的数值清单,我认为,从第二个表格中可以看出一个数值。

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master"   Inherits="System.Web.Mvc.ViewPage<CustomerDatabase.WebUI.Models.CustomerSitesListViewModel>    " %>

<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
Customer Sites
</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<% foreach (var customerSite in Model.CustomerSites) { %>
<% Html.RenderPartial("CustomerSiteSummary", customerSite); %>
<%} %>
</asp:Content>

This is the viewmodel, notice i am including a Customer member in the viewmodel as i want to display the customer name in addition to the list of customer sites

namespace CustomerDatabase.WebUI.Models
{
public class CustomerSitesListViewModel
{
    public IList<CustomerSite> CustomerSites { get; set; }
    public PagingInfo PagingInfo { get; set; }
    public Customer customer { get; set; }
}
}

This is my controller code for the view

 public ViewResult List([DefaultValue(1)] int page)
    {
        var customerSitesToShow = customerSiteRepository.CustomerSites;
        var viewModel = new CustomerSitesListViewModel
        {
            CustomerSites = customerSitesToShow.Skip((page - 1) *   PageSize).Take(PageSize).ToList(),
            PagingInfo = new PagingInfo
            {
                CurrentPage = page,
                ItemsPerPage = PageSize,
                TotalItems = customerSitesToShow.Count()
            }
        };

        return View(viewModel);  //Passed to view as ViewData.Model (or simply model)
    }

This is my partial view that renders the list,

<%@ Control Language="C#"    Inherits="System.Web.Mvc.ViewUserControl<CustomerDatabase.Domain.Entities.CustomerSite>" %>
<div class="item">
<div class="customer-list-item">
<h2><%:Model.customer.CustomerName%></h2>
<%: Model.AddressLine1 %> 
<%: Model.AddressLine2%>

虽然在座各位允许我从看看看看看客户物体。

<h2><%:Model.customer.CustomerName%></h2>

一种错误在浏览时被推翻,

Object reference not set to an instance of an object. Source Error:

Line 7:   <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
Line 8:   <% foreach (var customerSite in Model.CustomerSites) { %>
Line 9:   <%:Model.customer.CustomerName%>
Line 10:  <% Html.RenderPartial("CustomerSiteSummary", customerSite); %>
Line 11:  <%}

我认为,这一错误是因为有人认为,要列出一个名单,即试图将观点成员改为观点成员。

 public IList<Customer> {get; set;}

但这也不可行。

任何人能否建议一种办法,即能够做到这一点,或就哪里发生错失行为提出任何建议? 这个问题在数小时后无法解决,或者在互联网上进行研究?

Answer 1

它认为,像一种模式性质一样,没有初步形成。如果你在这条线上添加一个断点,并核对变量Im ,那么你就会发现1个是<代码>null。

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