asp.net-mvc – MVC：如何将文件上传和其他表单字段发布到一个操作

我正在创建一个DocumentController的文档库应用程序，需要在库中上传每个doument的缩略图。我想将文件上传字段保留在与其他字段(标题，说明，类别ID等)相同的创建/编辑表单上。
问题是我不确定是否可以混合或嵌套表单标签

Html.BeginForm("Create","Document",FormMethod.Post,enctype = "multipart/form-data")

和

Html.BeginForm()

我的看法如下：

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<Publications.WebUI.Models.DocumentEditviewmodel >" %>

<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
    Edit
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
    <fieldset>
        <legend>Edit
            <%=  Html.Truncate(Model.Document.Title,50)%></legend>
        <%= Html.ValidationSummary(false) %>
        <% using (Html.BeginForm())
           { %>
        <div class="editor-label">
            <%= Html.LabelFor(model => model.Document.Title) %>
        </div>
        <div class="editor-field">
            <%= Html.HiddenFor(model => model.Document.DocumentId ) %>
            <%= Html.ValidationMessageFor(model => model.Document.Title) %>
            <%= Html.TextBoxFor(model => model.Document.Title)%>
        </div>
        <div class="editor-label">
            <%= Html.LabelFor(model => model.Document.DocumentUrl)%>
        </div>
        <div class="editor-field">
            <%= Html.ValidationMessageFor(model => model.Document.DocumentUrl)%>
            <%= Html.TextBoxFor(model => model.Document.DocumentUrl)%>
        </div>
        <div class="editor-label">
            <%= Html.LabelFor(model => model.Document.Description)%>
        </div>
        <div class="editor-field">
            <%= Html.ValidationMessageFor(model => model.Document.Description)%>
            <%= Html.TextAreaFor(model => model.Document.Description) %>
        </div>
        <div class="editor-label">
            <%= Html.LabelFor(model => model.Document.ThumbnailUrl )%>
        </div>
        <div class="editor-field">
            <% using (Html.BeginForm("Create",new { enctype = "multipart/form-data" }))
               {%>
            <%= Html.ValidationMessageFor(model => model.Document.ThumbnailUrl )%>
            <input name="uploadFile" type="file" />
            <% } %>
        </div>
        <div class="formActions">
            <div class="backNav">
                <%= Html.ActionLink("< Back to List","Index") %>
            </div>
            <div class="submit">
                <input type="submit" value="Save" />
            </div>
            <% } %>
        </div>
    </fieldset>
</asp:Content>

我的控制器只需要使用Document模型和HttpPostedFileBase，并尝试将文件上传到服务器并将文档保存到存储库

[HttpPost]
 public ActionResult Create(Document document,HttpPostedFileBase uploadFile)
 {

     if (ModelState.IsValid)
     {
         //Process file upload
         //Update repository

      }

       return View("List");
  }

所以我想知道是否可以做同样的操作的文件上传和更新存储库，我应该如何构造我的视图来促进这一点。

解决方法

我看过史蒂夫·桑德森的伟大的书(Pro ASP.NET MVC 2框架)，他的运动商店示例应用程序有一个文件上传表单，其中有标准的表单元素与文件上传“multipart / form-data”元素混合。因此，页面上所有表单元素的多部分类型就足够了。虽然上传的图像被保存在数据库中我确信我可以在同一个Action中执行一个file.SaveAs()。感谢桑德森先生。希望你不介意我复制代码…

视图

<asp:Content ContentPlaceHolderID="MainContent" runat="server">
    <h1>Edit <%= Model.Name %></h1>

    <% using (Html.BeginForm("Edit","Admin",new { enctype = "multipart/form-data" })) { %>
        <%= Html.Hidden("ProductID") %>
        <p>
            Name: <%= Html.TextBox("Name") %>
            <div><%= Html.ValidationMessage("Name") %></div>
        </p>
        <p>
            Description: <%= Html.TextArea("Description",null,4,20,null) %>
            <div><%= Html.ValidationMessage("Description") %></div>
        </p>
        <p>
            Price: <%= Html.TextBox("Price") %>
            <div><%= Html.ValidationMessage("Price") %></div>
        </p>
<p>
    Category: <%= Html.TextBox("Category") %>
    <div><%= Html.ValidationMessage("Category") %></div>
</p>
<p>
    Image:
    <% if(Model.ImageData == null) { %>
        None
    <% } else { %>
        <img src="<%= Url.Action("Getimage","Products",new { Model.ProductID }) %>" />
    <% } %>
    <div>Upload new image: <input type="file" name="Image" /></div>                
</p>

<input type="submit" value="Save" /> &nbsp;&nbsp;
        <%=Html.ActionLink("Cancel and return to List","Index") %>
    <% } %>
</asp:Content>

控制器

[AcceptVerbs(HttpVerbs.Post)]
    public ActionResult Edit(Product product,HttpPostedFileBase image)
    {
        if (ModelState.IsValid) {
            if (image != null) {
                product.ImageMimeType = image.ContentType;
                product.ImageData = new byte[image.ContentLength];
                image.InputStream.Read(product.ImageData,image.ContentLength);
            }
            productsRepository.SaveProduct(product);
            TempData["message"] = product.Name + " has been saved.";
            return RedirectToAction("Index");
        }
        else // Validation error,so redisplay same view
            return View(product);
    }