public override View GetView(
int position,
View convertView,
ViewGroup parent)
{
View row;
if (convertView == null)
{
LayoutInflater inflater =
(LayoutInflater)Context.GetSystemService(Context.LayoutInflaterService);
row = inflater.Inflate(Resource.Layout.TodoItem, null);
}
else
{
// Reuse past view
row = convertView;
}
var item = this.GetItem(position);
// Hydrate data/event handlers
((TextView)row.FindViewById(Resource.Id.text)).Text = item.Text;
var checkBox = (CheckBox)row.FindViewById(Resource.Id.checkBox);
checkBox.SetOnCheckedChangeListener(null);
if (_itemState.ContainsKey(item.Id))
{
checkBox.Checked = _itemState[item.Id];
}
else
{
checkBox.Checked = item.IsChecked;
}
checkBox.CheckedChange += async delegate(
object sender,
CompoundButton.CheckedChangeEventArgs e)
{
var query = new BsonDocument
{
{ "_id", new BsonDocument {
{ "$oid", item.Id.ToString() }
} }
};
var update = new BsonDocument
{
{ "$set", new BsonDocument
{
{ "checked", e.IsChecked }
} }
};
_itemState[item.Id] = e.IsChecked;
await _itemSource.UpdateOne(query, update, false);
_itemState.Remove(item.Id);
};
return(row);
}