private async Task UpdateVMAsync()
{
var binder = DataContext as Binder;
if (binder != null && !binder.IsDisposed)
{
if (_vm == null)
{
_vm = new BinderCoverVM(binder, _animationStarter);
await _vm.OpenAsync().ConfigureAwait(false);
RaisePropertyChanged_UI(nameof(VM));
}
else if (_vm.Binder != binder)
{
await DisposeVMAsync().ConfigureAwait(false);
_vm = new BinderCoverVM(binder, _animationStarter);
await _vm.OpenAsync().ConfigureAwait(false);
RaisePropertyChanged_UI(nameof(VM));
}
}
else
{
await DisposeVMAsync().ConfigureAwait(false);
}
}
private async Task DisposeVMAsync()
{
var vm = _vm;
if (vm != null)
{
await vm.CloseAsync();
vm.Dispose();
VM = null;
}
}
