MVC2 HttpPostedFileBase對象始終是空的

Question

我試圖在線重新創建數千個簡單示例，並且每次都失敗。

我在做什麼錯？

• Other.aspx

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

  繼承= 「System.Web.Mvc.ViewPage」 ％>

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

  RUNAT = 「服務器」> 其他

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

  RUNAT = 「服務器」>

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

  • HomeController.vb

  _ 公共類的HomeController 繼承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

您需要將表單的enctypeHTML屬性設置爲multipart/form-data。