如何写 “Html.BeginForm” 剃刀

Question

如果我写这样的：

形式行动= “图像” 方法= “邮报” ENCTYPE = “的multipart/form-data的”

它的工作原理是

。

但在剃刀与'@'它不起作用。我犯了什么错误吗？

@using (Html.BeginForm("Upload", "Upload", FormMethod.Post, 
          new { enctype = "multipart/form-data" })) 
{ 
    @Html.ValidationSummary(true) 

    <fieldset> 

     Select a file <input type="file" name="file" /> 
     <input type="submit" value="Upload" /> 

    </fieldset> 
} 

我的控制器看起来是这样的：

[AcceptVerbs(HttpVerbs.Post)] 
public ActionResult Upload() 
{ 
    foreach (string file in Request.Files) 
    { 
     var uploadedFile = Request.Files[file]; 
     uploadedFile.SaveAs(Server.MapPath("~/content/pics") + 
             Path.GetFileName(uploadedFile.FileName)); 
    } 

    return RedirectToAction ("Upload"); 
} 

Answer 1

下面的代码工作正常：

@using (Html.BeginForm("Upload", "Upload", FormMethod.Post, 
             new { enctype = "multipart/form-data" })) 
{ 
    @Html.ValidationSummary(true) 
    <fieldset> 
     Select a file <input type="file" name="file" /> 
     <input type="submit" value="Upload" /> 
    </fieldset> 
} 

，并产生预期：

<form action="/Upload/Upload" enctype="multipart/form-data" method="post">  
    <fieldset> 
     Select a file <input type="file" name="file" /> 
     <input type="submit" value="Upload" /> 
    </fieldset> 
</form> 

在另一方面，如果你正在编写这个代码他在其他服务器端构造（例如if或foreach）的上下文中应删除@之前的using。例如：

@if (SomeCondition) 
{ 
    using (Html.BeginForm("Upload", "Upload", FormMethod.Post, 
             new { enctype = "multipart/form-data" })) 
    { 
     @Html.ValidationSummary(true) 
     <fieldset> 
      Select a file <input type="file" name="file" /> 
      <input type="submit" value="Upload" /> 
     </fieldset> 
    } 
} 

至于你的服务器端代码而言，这里是how to proceed：

[HttpPost] 
public ActionResult Upload(HttpPostedFileBase file) 
{ 
    if (file != null && file.ContentLength > 0) 
    { 
     var fileName = Path.GetFileName(file.FileName); 
     var path = Path.Combine(Server.MapPath("~/content/pics"), fileName); 
     file.SaveAs(path); 
    } 
    return RedirectToAction("Upload"); 
}