public async Task EditZone(object obj)
{
ZoneViewModel zvm = (ZoneViewModel)obj;
zvm.CreateMode = false;
ZoneCardPage nzp = new ZoneCardPage(zvm);
await Navigation.PushAsync(nzp);
}
public async Task NewZone()
{
Zone zone = new Zone()
{
LocationCode = Location.Code
};
ZoneViewModel zvm = new ZoneViewModel(Navigation, zone)
{
CreateMode = true
};
zvm.CanChangeLocationCode = false;
ZoneCardPage nzp = new ZoneCardPage(zvm);
await Navigation.PushAsync(nzp);
}