private async void Back_Click(object sender, RoutedEventArgs e)
{
TimeTable.Instance.UnChoose();
TimeTableList tmp = await TimeTable.Instance.GetContent();
PutContent(tmp.content, tmp.backContent);
}
private async void itemsControl_Click(object sender, RoutedEventArgs e)
{
var button = (Button)e.OriginalSource;
string dataItem = button.DataContext as string;
TimeTableList newContent = await timeTable.Choose(dataItem);
if (newContent != null)
{
PutContent(newContent.content, newContent.backContent);
}
}