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I'm posting a simple text file to an asp.net MVC app. When I post using the form below, the form parameter is not null. But file is. Any ideas what I'm doing wrong?

<form method=post action="http://localhost/Home/ProcessIt" 
enctype="application/x-www-form-urlencoded"> 
<input type=file id="thefile" name="thefile" /> 
<input type="submit" name="Submit" /> 
</form>

In the asp.net mvc app:

[HttpPost]
public ActionResult ProcessIt(FormCollection thefile)
{
  HttpPostedFileBase file = Request.Files["thefile"];
  ...
}
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5
  • 2
    stackoverflow.com/questions/5193842/file-upload-asp-net-mvc-3-0/… Commented Nov 27, 2013 at 4:05
  • If I use HttpPostedFileBase, the parameter will be null. Commented Nov 27, 2013 at 4:32
  • use the same name for your input element and method parameter. Follow the link i posted Commented Nov 27, 2013 at 4:37
  • 1
    I've updated the post. I am using the same ID/Name for the input element and method parameter. Still no file. Commented Nov 27, 2013 at 4:48
  • 1
    Got it working with FormCollection. IE was caching my form fields. Once I refreshed, it began working. Commented Nov 27, 2013 at 4:55

2 Answers 2

Reset to default
5

This works for me:

View:

@using (Html.BeginForm("Index", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    <input type="file" name="file" />
    <input type="submit" value="OK" />
}

Controller:

[HttpPost]
public ActionResult Index(HttpPostedFileBase file)
{
    // Verify that the user selected a file
    if (file != null && file.ContentLength > 0) 
    {
        // extract only the fielname
        var fileName = Path.GetFileName(file.FileName);

        // then save on the server...
        var path = Path.Combine(Server.MapPath("~/uploads"), fileName);
        file.SaveAs(path);
    }
    // redirect back to the index action to show the form once again
    return RedirectToAction("Index");        
}
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1 Comment

Instead of copying and pasting solutions as your own you should really point to the original. stackoverflow.com/a/5193851/1759873
0

Need to change the enctype to multipart/form-data: http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.2

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1 Comment

file is still null. There isn't anything in the Request.Files collection.

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