public ViewHostel(string areaid)
 {
     InitializeComponent();
     areaids        = areaid;
     BindingContext = vm = new ViewHostelVM(areaid);
     //viewhostel.ItemsSource = vm.HostelDetaillists;
 }
 protected override void OnAppearing()
 {
     base.OnAppearing();
     if (!string.IsNullOrEmpty(App.filterno))
     {
         BindingContext = vm = new ViewHostelVM(App.filterno);
     }
     else
     {
         BindingContext = vm = new ViewHostelVM(areaids);
     }
 }