Read dropdown value at server side from hidden field

public ActionResult Create([Bind(Include = "Id,DiscountApplied,PaymentStatus,TotalAmount,BillGenerationDatetime,CreatedDateTime,ModifiedDateTime,CreatedBy,ModifiedBy,DueDate")] tbl_Invoice tbl_Invoice)

{

if (ModelState.IsValid)

{

DateTime saveTime = DateTime.Now;

tbl_Invoice.Id = Guid.NewGuid();

db.tbl_Invoice.Add(tbl_Invoice);

if (tbl_Invoice.CreatedDateTime == null && tbl_Invoice.ModifiedDateTime == null && tbl_Invoice.BillGenerationDatetime == null)

{

tbl_Invoice.CreatedDateTime = saveTime;

tbl_Invoice.ModifiedDateTime = saveTime;

tbl_Invoice.BillGenerationDatetime = saveTime;

}

db.SaveChanges();

return RedirectToAction("Index");

}

return View(tbl_Invoice);

}