private async void ChangeGerneCommandExecute(object obj) { RankCollection.Clear(); RankCollection.Add(new RankList() { singer = "로딩중", }); string type = obj.ToString(); var result = await serivce.GetRankFromUrl(type); if (result != null) { RankCollection.Clear(); foreach (var i in result) { string[] values = i.Value.Split(new string[] { "<divided>" }, StringSplitOptions.None); RankCollection.Add(new RankList() { rank = i.Key + 1, singer = values[0], song = values[1], SearchCommand = this.SearchCommand }); } } else { DependencyService.Get <IMessageToast>().Alert("연결 오류"); } }