具有多个HttpPostedFileBase属性的MVC模型

Question

我在get / post操作中使用以下模型。

Public Class AuthorEditQuestionViewModel

    <Required()>
    <Display(Name:="Question Title")>
    Public Property Title As String

    <Display(Name:="Start Ledger")>
    Public Property StartLedger As HttpPostedFileBase
    Public Property StartLedgerUrl As String

    <Display(Name:="End Ledger")>
    Public Property EndLedger As HttpPostedFileBase
    Public Property EndLedgerUrl As String

    <Required()>
    <Display(Name:="Introduction/Instructions")>
    Public Property IntroductionHtml As String

End Class

分类帐字段的html如下所示。

<input type="file" id="StartLedger" name="StartLedger" />
<input type="file" id="EndLedger" name="EndLedger" />

但是，在post操作中，似乎StartLedger和EndLedger属性似乎都填充了相同的值（第一个文件）。

有没有人有任何使用MVC3处理多个命名文件上传字段的示例？从版本1开始，支持文件上传确实是ASP.Net MVC的一个缺点。

----编辑（下面的.vbhtml）

@Using Html.BeginForm("EditQuestion", "Author", Nothing, FormMethod.Post, New With {.enctype = "multipart/form-data"})

    @Html.ValidationSummary("Please correct the following issues.")

    @<table class="form">
        <tr>
            <td class="label">@Html.LabelFor(Function(m) m.Title)</td>
            <td class="input">
                @Html.TextBoxFor(Function(m) m.Title)
            </td>
        </tr>
        <tr>
            <td class="label">@Html.LabelFor(Function(m) m.StartLedger)</td>
            <td class="input">
                <input type="file" id="StartLedger" name="StartLedger" />
                @If Not String.IsNullOrWhiteSpace(Model.StartLedgerUrl) Then
                    @<a href="@Model.StartLedgerUrl">Download</a>
                End If
            </td>
        </tr>
        <tr>
            <td class="label">@Html.LabelFor(Function(m) m.EndLedger)</td>
            <td class="input">
                <input type="file" id="EndLedger" name="EndLedger" />
                @If Not String.IsNullOrWhiteSpace(Model.EndLedgerUrl) Then
                    @<a href="@Model.EndLedgerUrl">Download</a>
                End If
            </td>
        </tr>
        <tr>
            <td class="label" colspan="2">@Html.LabelFor(Function(m) m.IntroductionHtml)</td>
        </tr>
        <tr>
            <td class="input" colspan="2">@Html.TextAreaFor(Function(m) m.IntroductionHtml, 10, 80, Nothing)</td>
        </tr>
        <tr>
            <td class="buttons" colspan="2">
                <button class="action" data-action="@Url.Action("Index")">Cancel</button>
                <button>Save</button>
            </td>
        </tr>
    </table>


End Using

行动的签名如下......

Function EditQuestion(id As Guid?, model As AuthorEditQuestionViewModel) As ActionResult