public IActionResult Reset()
{
List <Dachi> ret = HttpContext.Session.GetObjectFromJson <List <Dachi> >("dachi");
Dachi dachi = (Dachi)ret[0];
dachi.reset();
List <object> dachilist = new List <object>();
dachilist.Add(dachi);
HttpContext.Session.SetObjectAsJson("dachi", dachilist);
return(RedirectToAction("Index"));
}