IFormFile always null (ASP.NET Core with MVC/Razor)

Question

I have an ASP.NET Core MVC app attempting to upload an IFormFile. However, the IFormFile is always null. None of the other solutions I've found have solved this issue. What am I doing wrong?

Model

public class EmailForm {     [Display(Name = "Add a picture")]     [DataType(DataType.Upload)]     [FileExtensions(Extensions = "jpg,png,gif,jpeg,bmp,svg")]     public IFormFile SubmitterPicture { get; set; } } 

Controller

public async Task<ActionResult> Contribute([Bind("SubmitterPicture")] EmailForm model) {     if (ModelState.IsValid)     {         //Do some stuff     } } 

View

        <form method="post" asp-action="Contribute" asp-antiforgery="true" enctype="multipart/form-data" >             <div class="form-group" >                 <div class="col-md-2">@Html.LabelFor(m => m.SubmitterPicture)</div>                 <div class="col-md-4">                     <input type="file" name="SubmitterPicture" id="SubmitterPicture" />     </div>             <div class="form-group">                 <div class="col-md-offset-2 col-md-10">                     <input type="submit" class="btn btn-default" value="Contribute" />                 </div>             </div> 

Answer 1

<form method="post" enctype="multipart/form-data"> </form> 

enctype="multipart/form-data"

The multipart form data is the key.

Answer 2

You can alternatively get the file from the HttpContext.Request.Form.Files and get rid of the IFormFile interface in your model. I recommend this method as I believe that files have nothing to do with data models.

The example would be:

public IActionResult Index() {     //Please note that if no form data is posted     // HttpContext.Request.Form will throw an exception     if (HttpContext.Request.Form.Files[0] != null) {         var file = HttpContext.Request.Form.Files[0];         using (FileStream fs = new FileStream("Your Path", FileMode.CreateNew, FileAccess.Write, FileShare.Write)) {             file.CopyTo(fs);         }     }     return View(); } 

If this method also fails, that means there is something wrong with the multipart request.