Is it possible to map a file upload to HttpPostedFileBase in a c# web api?

I want to send a file to a web api. Does this work or do I have to use an MVC controller instead and use Request.Files?

I have a simple file upload like this

<div class="form-group">
                    <label class="control-label">Upload Custom Clause</label>
                    <input id="fileupload" type="file" onchange="FileSelected(searchForm.fileupload)" name="fileupload" />
                </div>

My form is marked as

 enctype="multipart/form-data"

I then get the file from the uploader and assign it to a property on an object I am not using the javascript file reader, can the actual file not map to HttpPostedFileBase in c#?

function FileSelected(fileuploader: any) {

var reader = new FileReader();    

var file = fileuploader.files[0];    

uploadedFile = file

//reader.onload = function (evt: any) {

//    filecontentStr = evt.target.result;
//}    

}

I then have a c# web api method which maps an object. The file is a property in quoteData.UploadedFile and is of type HttpPostedFileBase.

[Route("api/quoteEngine/createPolicy")]
    [HttpPost]
    public IHttpActionResult PostPolicy([FromBody] QuoteEngineView quoteData)
    {

So I then have this, but UploadedFile is null... :(

if (policy.UploadedFile != null)
        {
            var temppath = $"{Directory.GetCurrentDirectory()}\\{policy.UploadedFile.FileName}";
            //var file = File.Create(temppath);               
            Stream str = policy.UploadedFile.InputStream;
            BinaryReader Br = new BinaryReader(str);
            clausebuffer = Br.ReadBytes((Int32)str.Length);
            string result = System.Text.Encoding.UTF8.GetString(clausebuffer);

            File.WriteAllText(temppath, result);

        }