private Task <bool> OnSaveAsync(EditFooTree item)
{
if (item.Id == 0)
{
item.Id = AllItems.Max(i => i.Id) + 1;
AllItems.Add(item);
}
else
{
var oldItem = AllItems.FirstOrDefault(i => i.Id == item.Id);
if (oldItem != null)
{
oldItem.ParentId = item.ParentId;
oldItem.Name = item.Name;
oldItem.DateTime = item.DateTime;
oldItem.Address = item.Address;
oldItem.Count = item.Count;
}
}
return(Task.FromResult(true));
}