MVC2 HttpPostedFileBase对象总是一无所获

Question

我尝试在线重新创建成千上万的简单示例，每次都失败。

我做错了什么？

• Other.aspx

  <%@ Page Title="" Language="VB" MasterPageFile="~/Views/Shared/Site.Master"
  

       

  Inherits =“System.Web.Mvc.ViewPage”％＆gt;

  <asp:Content ID="Content1" ContentPlaceHolderID="TitleContent"
  

       

  RUNAT = “服务器” ＆GT;         其他       

  <asp:Content ID="Content2" ContentPlaceHolderID="MainContent"
  

       

  RUNAT = “服务器” ＆GT;

      <h2>Upload A File</h2>
  
       <% Html.BeginForm("UploadFile", "Home")%>
         <input type="file" name="f" />
         <input type="submit" />
         <% Html.EndForm()%>
      </form>
  </asp:Content>
  

  • HomeController.vb

    

  _       公共类HomeController           继承System.Web.Mvc.Controller

      Function Index() As ActionResult
          ViewData("Message") = "Welcome to ASP.NET MVC!"
  
          Return View()
      End Function
  
      Function About() As ActionResult
          Return View()
      End Function
  
      <HttpPost()> _
      Sub UploadFile(f As HttpPostedFileBase) <---Breakpoint here, f is always "Nothing"
  
          RedirectToAction("Other")
      End Sub
  
  
      Function Other() As ActionResult
          Return View()
      End Function
  End Class
  

Answer 1

您需要将表单的enctype HTML属性设置为multipart/form-data。