无法在View中看到ViewModel属性?

时间:2016-03-04 16:17:00

标签: c# asp.net-mvc

我还在尝试使用ViewModels和IEnumerable / List作为属性。我显然遗漏了一些不允许我在我的视图中看到我的IEnumberable的东西。

我最终要做的是有一个视图,该视图将显示未分配给组的未分配用户列表(在这种情况下称为Patrols,PatrolId = 0)。该表将在每个成员旁边有一个复选框。该表上方将是可用巡逻的DropDownList。管理员将进入该页面以查看尚未分配的内容,从顶部的DDL中选择一个巡逻,检查他想要的用户分配给该巡逻队,然后提交将要从DDL传递PatrolID并找到所有选定的成员,以便用该PatrolId更新他们的记录。

在下面的视图中,当我循环浏览Scout属性时,我会假设我可以在这部分中使用Model.Scout来循环并写出该IEnumerable中的所有成员。

@for (var i = 0; i < Model.Count(); i++)

然而,当我尝试使用intellisense在使用模型时看到Scout属性时,我没有看到该属性。除此之外,我认为在写出所有行之前,我需要首先检查Scout属性以查看是否有计数。同样,我无法看到Scout属性,以便检查它的数量。

视图模型

public class PatrolMemberViewModel
    {
        [Key]
        public int MemberId { get; set; }

        public int PatrolId { get; set; }


        [Display(Name = "First Name")]
        public string FirstName { get; set; }


        [Display(Name = "Last Name")]
        public string LastName { get; set; }


        [Display(Name = "Phone")]
        public string PhonePrimary { get; set; }


        [Display(Name = "Email")]
        public string EmailPrimary { get; set; }

        public bool IsSelected { get; set; }

    }

    public class PatrolUnassignedViewModel
    {
        public SelectList Patrols { get; set; }

        public IEnumerable<PatrolMemberViewModel> Scout { get; set; }
    }

控制器

// GET: 
        public ViewResult Unassigned()
        {
            PatrolUnassignedViewModel unassinged = new PatrolUnassignedViewModel();
            unassinged.Patrols = new SelectList(repository.SelectAllPatrols());
            unassinged.Scout = repository.SelectAllUnassigned();

            return View(unassinged);
    }

存储库

public IEnumerable<PatrolMemberViewModel> SelectAllUnassigned()
        {
            using (DataContext db = new DataContext())
            {
                var results = (from p in db.Person
                               where p.IsActive == true
                               && p.IsScout == true
                               && p.PatrolId == 0
                               select new PatrolMemberViewModel
                               {
                                   MemberId = p.PID,
                                   FirstName = p.FirstName ?? string.Empty,
                                   LastName = p.LastName ?? string.Empty,
                                   EmailPrimary = p.EmailPrimary ?? string.Empty,
                                   PhonePrimary = p.PhonePrimary ?? string.Empty,
                                   PatrolId = p.PatrolId,
                                   IsSelected = false
                               }
                                ).OrderBy(o => o.LastName).ThenBy(o => o.FirstName).ToList();

                return results;
            }
        }

public IEnumerable<PatrolName> SelectAllPatrols()
        {
            return db.PatrolNames;
        }

查看

@model IList<ProjectName.ViewModels.PatrolUnassignedViewModel>

@{
    ViewBag.Title = "Unassigned";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Patrols</h2>
<h4>Assign Scouts to a Patrol.</h4>


@using (Html.BeginForm("Update", "Patrol", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    @Html.AntiForgeryToken()
    @Html.ValidationSummary(false, "", new { @class = "alert alert-danger" })

    <table class="table table-bordered table-striped table-hover table-condensed tbackground">
        <tr>
            <th class="text-center">

            </th>
            <th class="text-center">
                First Name
            </th>
            <th class="text-center">
                Last Name
            </th>
            <th class="text-center">
                Email
            </th>
            <th class="text-center">
                Phone
            </th>
        </tr>

        @for (var i = 0; i < Model.Count(); i++)
        {
        <tr>
            <td class="text-center">
                @Html.CheckBoxFor(m => m[i].IsSelected)
            </td>
            <td>
                @Html.DisplayFor(m => m[i].FirstName)
            </td>
            <td>
                @Html.DisplayFor(m => m[i].LastName)
            </td>
            <td>
                <a href="mailto:@Model[i].EmailPrimary">@Model[i].EmailPrimary</a>
            </td>
            <td class="text-center">
                @Html.DisplayFor(m => m[i].PhonePrimary)
            </td>
        </tr>
        }

    </table>

    <div class="control-wrapper">
        <input type="submit" id="btnSubmit" value="Assign Scouts" class="btn btn-success" />
    </div>
}
<p>&nbsp;</p>

2 个答案:

答案 0 :(得分:3)

您的控制器正在返回PatrolUnassignedViewModel类的单个实例

    public ViewResult Unassigned()
    {
        PatrolUnassignedViewModel unassinged = new PatrolUnassignedViewModel();
        unassinged.Patrols = new SelectList(repository.SelectAllPatrols());
        unassinged.Scout = repository.SelectAllUnassigned();
        return View(unassinged);
    }

您的观点期待IList

@model IList<ProjectName.ViewModels.PatrolUnassignedViewModel>

应该期待什么

@model ProjectName.ViewModels.PatrolUnassignedViewModel

你的侦察兵是IEnumerable,因此没有计数方法,所以应该是

public IList<PatrolMemberViewModel> Scout { get; set; }
public IList<PatrolMemberViewModel> SelectAllUnassigned()
{
}

你应该像这样做你的循环

    @for (var i = 0; i < Model.Scout.Count(); i++)
    {
    <tr>
        <td class="text-center">
            @Html.CheckBoxFor(m => m.Scout[i].IsSelected)
        </td>
        <td>
            @Html.DisplayFor(m => m.Scout[i].FirstName)
        </td>
        <td>
            @Html.DisplayFor(m => m.Scout[i].LastName)
        </td>
        <td>
            <a href="mailto:@Model.Scout[i].EmailPrimary">@Model.Scout[i].EmailPrimary</a>
        </td>
        <td class="text-center">
            @Html.DisplayFor(m => m.Scout[i].PhonePrimary)
        </td>
    </tr>
    }

我在这里错过了什么吗?

答案 1 :(得分:1)

从您的GET操作方法,您传递的是PatrolUnassignedViewModel的单个对象。但是您的视图绑定到PatrolUnassignedViewModel的集合。所以改变你的观点就像

@model PatrolUnassignedViewModel

现在您可以使用Model.Scout属性作为集合。

@model PatrolUnassignedViewModel
<h2>Total : @Model.Scout.Count()</h2>
@foreach(var item in Model.Scout)
{
   <label>@item.FirstName</label>
}