public async Task <ActionResult> Index()
{
try
{
var list = await FaceHelper.GetFaceModelList("https://images2015.cnblogs.com/blog/658978/201609/658978-20160922111329527-2030285818.png");
//todo:web端的处理（我这边就不弄了，需求是搞PC版的处理）
ViewBag.InfoList = await list.ObjectToJsonAsync();
}
catch (FaceException ex)
{
ViewBag.ErrorInfo = ex.Message;
}
return(View());
}