VIEW:
            @using (Html.BeginForm("UploadArray", "RetrieveStores", null, FormMethod.Post, new { enctype = "multipart/form-data" }))
            {
                @Html.AntiForgeryToken()
                @Html.ValidationSummary()

                <div class="form-group">
                    <input type="file" id="dataFile" name="upload" />
                </div>

                <div class="form-group">
                    <input type="submit" value="Upload" class="btn btn-default" />
                </div>
            }

CONTROLLER:
        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult UploadArray(HttpPostedFileBase upload)
        {
            if (ModelState.IsValid)
            {
.............................

            <a href="@Url.Action("UploadArray", "RetrieveStores", new { upload = "C:\\Users\\&&&\\Desktop\\Копия.xlsx" }, null)" class="modItem btn btn-primary">
                <i class="fa fa-pencil"></i>
            </a>

VIEW
            <form id="fileUpload" action="@Url.Action("UploadArrayCount")" method="POST" enctype="multipart/form-data">
                <input id="fileInput" name="fileInput" type="file" />
                <input type="submit" value="Upload file" id="btnFileUpload" />
            </form>

            <input type="text" placeholder="Нет массива данных" value="@(Session["arrayInfo2"] as string)" disabled>

CONTROLLER:
        [HttpPost]
        public ActionResult UploadArrayCount(HttpPostedFileBase upload)
        {
            // HttpPostedFileBase upload = Request.Files["fileInput"];
            string modelName = Session["ModelName"] as string;

            if (ModelState.IsValid)
            {

                if (upload != null && upload.ContentLength > 0)
                {
                    // ExcelDataReader works with the binary Excel file, so it needs a FileStream
                    // to get started. This is how we avoid dependencies on ACE or Interop:
                    Stream stream = upload.InputStream;

                    // We return the interface, so that
                    IExcelDataReader reader = null;

                    if (upload.FileName.EndsWith(".xls"))
                    {
                        reader = ExcelReaderFactory.CreateBinaryReader(stream);
                    }
                    else if (upload.FileName.EndsWith(".xlsx"))
                    {
                        reader = ExcelReaderFactory.CreateOpenXmlReader(stream);
                    }
                    else
                    {
                        ModelState.AddModelError("File", "This file format is not supported");
                        // return View();
                    }

                    reader.IsFirstRowAsColumnNames = true;

                    DataSet result = reader.AsDataSet();
                    Session["ExcelResult"] = result.Tables[0];

                    reader.Close();

                    Session["arrayInfo2"] = string.Concat("Прочитано ", result.Tables[0].Rows.Count, " строк");

                    return RedirectToAction("Permyakov", "RetrieveStores", new { modelName = modelName });
                }
            }
            return RedirectToAction("Permyakov", "RetrieveStores", new { modelName = modelName });
        }

$("#btnFileUpload").click(function () {
    
    var formData = new FormData();
    var file = document.getElementById("fileInput").files[0];
    formData.append("upload", file);
    
    $.ajax({
        url: "/RetrieveStores/UploadArrayCount",
        type: "POST",
        data: formData,
        contentType: false,
        processData: false,
        success: function () {
            alert("URA");
        },
        error: function () {
            alert("Ошибка");
        }
    });