Converting file to bytes then saving to SQL using C# MVC

Question

Good morning!

I was able to do this in asp.net but I am moving to MVC using C# and am stuck.

Here is my view:

@using (Html.BeginForm())
{
 @Html.AntiForgeryToken()
 <input type="file" id="bgFileUpload" name="bgFileUpload" />
<input type="submit" id="createNewBtn_id" name="submitNew" value="submitNew" />
}

and then I have this in my controller:

public ActionResult Admin(string submitNew)
 {
 uploadFileToSqlDb();
 return View();
 }

The above calls my function. Here is the function:

[HttpPost]
 public ActionResult uploadFileToSqlDb()
 {
 byte[] uploadedFile = new
 byte[Request.Files["bgFileUpload"].InputStream.Length];

 return View();
 }

But everytime I get a "Object reference not set to an instance of an object". Any suggestions for a noobie such as myself?

Everything I have seen online I appear to be doing incorrectly or possibly interpretting it wrong.