Question

我正在尝试显示会员/角色表中的“角色”列表

我的控制器是：

' GET: /Admin/Index
Function Index() As ActionResult
    Dim model = New AdminRoles()
    model.Roles = Roles.GetAllRoles()
    Return View(model)
End Function

我的模特是：

Imports System.Data.Entity
Imports System.ComponentModel.DataAnnotations
Imports System.ComponentModel

Public Class AdminRoles
    Public Property Roles() As String()
End Class

Public Class AdminRolesDBContext
  Inherits DbContext
  Public Property AdminRole() As DbSet(Of AdminRoles)
End Class

我的观点是：

@ModelType IEnumerable(Of MPConversion.AdminRoles)
@Code
    ViewData("Title") = "Index"
End Code
<h2>Index</h2>
<p>    @Html.ActionLink("Create New", "Create")</p>
<table><tr><th>Role</th><th></th></tr>
@For Each item In Model
    Dim currentItem = item
    @<tr>
    <td>currentitem.Roles</td>
        <td>
            @*@Html.ActionLink("Edit", "Edit", New With {.id = currentItem.PrimaryKey}) |
            @Html.ActionLink("Details", "Details", New With {.id = currentItem.PrimaryKey}) |
            @Html.ActionLink("Delete", "Delete", New With {.id = currentItem.PrimaryKey})*@
        </td>
    </tr>
Next
</table>

但是我得到了错误：

传递到字典中的模型项的类型为'MPConversion.AdminRoles'，但此字典需要类型为'System.Collections.Generic.IEnumerable`1 [MPConversion.AdminRoles]'的模型项。

谁能看到我出错的地方？

Answer 1

您的类adminRoles没有实现IEnumerable。

Answer 2

只需使用

@ModelType MPConversion.AdminRoles

然后

 @For Each item In Model.Roles

您的AdminRoles类包含Roles.GetAllRoles（）返回的某种集合，但对象本身（AdminRoles）不是集合，并且根本不实现IEnumerable。

<强>更新优化一点：

Cotroller

Function Index() As ActionResult
    IEnumerable(Of String) allRoles = Roles.GetAllRoles() // modify the GetAllRoles method
    Return View(allRoles)
End Function

查看：

@ModelType IEnumerable(Of String)
@Code
    ViewData("Title") = "Index"
End Code
<h2>Index</h2>
<p>    @Html.ActionLink("Create New", "Create")</p>
<table><tr><th>Role</th><th></th></tr>
@For Each item In Model
    <tr>
    <td>@item</td>
    @* Commented part deleted for brevity *@
    </tr>
Next
</table>

如何在MVC中显示列表

2 个答案: