<div class="form-group g-mb-30">
    <label class="g-mb-10" for="inputGroup-3_1">Image *</label>
    <div class="g-pos-rel">
        <span class="g-pos-abs g-top-0 g-right-0 d-block g-width-40 h-100 opacity-0 g-opacity-1--success">
           <i class="hs-admin-check g-absolute-centered g-font-size-default g-color-lightblue-v3"></i>
        </span>
        <input class="js-file-attachment" name="fileAttachment2[]" type="file" id="ka-file">
    </div>
</div>

uploadFile: {
            url: '/FileUpload/Upload',
            data: document.getElementById('ka-file').files[0],
            type: 'POST',
            enctype: 'multipart/form-data',
            beforeSend: function() {
                formData = document.getElementById('ka-file').files[0];
                console.log(formData);
            },
        }

[HttpPost]
    public async Task<IActionResult> Upload(IFormFile file)
    {
        if(file == null)
        {
            return Ok(200);
        }
    }