Question

我正在使用Visual Studio 2013，MVC 5，EF 6，Visual Basic，Database First Approach构建项目。

在我的数据库中，我有一个表Employee，如下所示：

CREATE TABLE [dbo].[Employee]
(
    [Id] INT PRIMARY KEY IDENTITY (1, 1), 
    [FirstName] VARCHAR(50) NOT NULL, 
    [MiddleName] VARCHAR(50) NOT NULL, 
    [LastName] VARCHAR(50) NOT NULL, 
)

另一个表Qualification如下：

CREATE TABLE [dbo].[Qualification]
(
    [Id] INT PRIMARY KEY IDENTITY (1, 1), 
    [EmployeeId] INT NOT NULL REFERENCES Employee,
    [Degree] VARCHAR(50) NOT NULL, 
    [Institute] VARCHAR(50) NULL,
)

我的Employee和Qualification模型如下所示：

Partial Public Class Employee
    Public Property Id As Integer
    Public Property FirstName As String
    Public Property MiddleName As String
    Public Property LastName As String
    Public Overridable Property Qualifications As ICollection(Of Qualification) = New HashSet(Of Qualification)
End Class

Partial Public Class Qualification
    Public Property Id As Integer
    Public Property EmployeeId As Integer
    Public Property Degree As String
    Public Property Institute As String
    Public Overridable Property Employee As Employee
End Class

现在，在我看来;我想让用户一次插入1名员工以及他的5个资格：所以，我的观点是这样的：

@ModelType MyApp.Employee

@Using (Html.BeginForm()) 
    @Html.AntiForgeryToken()

    @<div class="form-horizontal">
        <h4>Employee</h4>
        <hr />
        @Html.ValidationSummary(True, "", New With { .class = "text-danger" })

        <div class="form-group">
            @Html.LabelFor(Function(model) model.FirstName, htmlAttributes:= New With { .class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(Function(model) model.FirstName, New With { .htmlAttributes = New With { .class = "form-control" } })
                @Html.ValidationMessageFor(Function(model) model.FirstName, "", New With { .class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(Function(model) model.MiddleName, htmlAttributes:= New With { .class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(Function(model) model.MiddleName, New With { .htmlAttributes = New With { .class = "form-control" } })
                @Html.ValidationMessageFor(Function(model) model.MiddleName, "", New With { .class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(Function(model) model.LastName, htmlAttributes:= New With { .class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(Function(model) model.LastName, New With { .htmlAttributes = New With { .class = "form-control" } })
                @Html.ValidationMessageFor(Function(model) model.LastName, "", New With { .class = "text-danger" })
            </div>
        </div>

    @For i = 0 To 5
        @<div class="form-group">
            @Html.LabelFor(Function(model) model.Qualifications(i).Degree, htmlAttributes:=New With {.class = "control-label col-md-2"})
            <div class="col-md-10">
                @Html.EditorFor(Function(model) model.Qualifications(i).Degree, New With {.htmlAttributes = New With {.class = "form-control"}})
                @Html.ValidationMessageFor(Function(model) model.Qualifications(i).Degree, "", New With {.class = "text-danger"})
            </div>
        </div>

        @<div class="form-group">
            @Html.LabelFor(Function(model) model.Qualifications(i).Institute, htmlAttributes:=New With {.class = "control-label col-md-2"})
            <div class="col-md-10">
                @Html.EditorFor(Function(model) model.Qualifications(i).Institute, New With {.htmlAttributes = New With {.class = "form-control"}})
                @Html.ValidationMessageFor(Function(model) model.Qualifications(i).Institute, "", New With {.class = "text-danger"})
            </div>
        </div>

    Next


        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
End Using

这就是我在控制器中编写动作方法的方法：

Function Create(<Bind(Include:="Id,FirstName,MiddleName,LastName,Qualifications")> ByVal employee As Employee) As ActionResult
    ' Code here
End Function

现在，当我填写并提交表单时，我会获得我为Employee提交的值，例如。 FirstName，MiddleName和LastName;但Qualifications计数为0。

我也尝试使用Tuple来解决问题，但是没有用。

我该怎么办？任何帮助，将不胜感激。

Answer 1

自己找到解决方案：

我将Qualifications类的Employee属性更改为：

Public Overridable Property Qualifications As List(Of Qualification) = New List(Of Qualification)

它就像一个魅力！

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1 个答案: