Question

我在使用MVC C＃应用程序中的某些数据时遇到了一个小问题。

在控制器中，我有以下内容来检索要在视图中使用的数据集。

public ActionResult Franchisee()
    {
        getNav();

        var data = (
                   from f in DietCenterDB.Franchises
                   join fc in DietCenterDB.FranchiseContents on f.ID equals fc.FranchiseId
                   into ffc
                   from subffc in ffc.DefaultIfEmpty()
                   select new { 
                                State = f.State,
                                City = f.City,
                                AccountCode = f.AccountCode,
                                CenterNumber = f.CenterNumber, 
                                FranchiseContentId = (subffc == null ? 0 : subffc.FranchiseContentId) }
                    ).ToList();

        return View(data);
    }

视图包含以下代码

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Content.master" Inherits="System.Web.Mvc.ViewPage<IEnumerable<dynamic>>" %>

<asp:Content ID="Head" ContentPlaceHolderID="HeadContent" runat="server">
</asp:Content>

<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server">

    <h1>Franchisee Administration - <%: Html.ActionLink("Add New", "FranchiseeEdit", new { id = 0 }) %></h1>
    &raquo; <%: Html.ActionLink("Content Management Home", "Index") %>
    <p></p>
    <table cellpadding="0" cellspacing="0" width="600px">
        <%
            int counter = 0;
            string rowClass;

            foreach (var item in Model) {
                if ((counter % 2) == 0)
                {
                    rowClass = "r1";
                }
                else
                {
                    rowClass = "r2";
                }

                string dataString = item.State + " " + item.City + " " + item.AccountCode + " " + item.CenterNumber;

        %>

                <tr class="row <%: rowClass %>">
                    <td>
                         <%: Html.ActionLink(dataString, "FranchiseeEdit", new { id = item.ID, City = item.City, State = item.State, Zip = item.Zip })%>
                    </td>
                    <td align="right">
                         <%: Html.ActionLink("Edit Microsite Content", "MicrositeContentEdit", new { id = item.ID, City = item.City, State = item.State, Zip = item.Zip })%>
                    </td>
                </tr>


            <% counter++; %>
        <% } %>
   </table>


</asp:Content>

当我运行应用程序时，我收到以下错误

'object'不包含'State'的定义

调试时，调试器显示数据实际上在内存中。

非常感谢任何提示或线索!!!

Answer 1

我会说这是因为你有一个动态的ViewPage，而不是强类型的：...

Inherits="System.Web.Mvc.ViewPage<IEnumerable<dynamic>>"

不是说它的问题，但会使事情变得棘手。

为什么不将查询投影到ViewModel中，并绑定到：

var data = (
                   from f in DietCenterDB.Franchises
                   join fc in DietCenterDB.FranchiseContents on f.ID equals fc.FranchiseId
                   into ffc
                   from subffc in ffc.DefaultIfEmpty()
                   select new MyViewModel { 
                                State = f.State,
                                City = f.City,
                                AccountCode = f.AccountCode,
                                CenterNumber = f.CenterNumber, 
                                FranchiseContentId = (subffc == null ? 0 : subffc.FranchiseContentId) }
                    ).ToList();

然后在你的视图中：

Inherits="System.Web.Mvc.ViewPage<IEnumerable<MyViewModel>>"

修改

MyViewModel是一个您需要创建的简单类，它允许为您的模型提供轻量级存储：

public class MyViewModel { public int State {get;set;} public int City {get;set;} public int AccountCode {get;set;} public int CenterNumber {get;set;} public int FranchiseContentId {get;set;} }

在MVC视图中访问数据集时，object不包含定义错误

1 个答案: