private void TextBox_LostFocus(object sender, RoutedEventArgs e)
        {
            ChangeMemberPriceViewModel model = this.DataContext as ChangeMemberPriceViewModel;

            model.DisplayMode = 0;
            model.KeyboardLittle.IsDisplayKeyboard = false;
        }
        private void TextBox_KeyDown(object sender, KeyEventArgs e)
        {
            TextBox tb = sender as TextBox;

            tb.Text = tb.Text.Trim();

            ChangeMemberPriceViewModel model = this.DataContext as ChangeMemberPriceViewModel;

            model.ChangePrice();

            if (tb.CaretIndex != tb.Text.Length)
            {
                tb.CaretIndex = tb.Text.Length;
            }
        }
        private void TextBox_GotFocus(object sender, RoutedEventArgs e)
        {
            ChangeMemberPriceViewModel model = this.DataContext as ChangeMemberPriceViewModel;

            model.DisplayMode = 1;

            TextBox tb = sender as TextBox;

            if (null != tb)
            {
                tb.CaretIndex = tb.Text.Length;
            }


            model.KeyboardLittle.IsDisplayKeyboard = true;
        }
        private void CheckBox_Click(object sender, RoutedEventArgs e)
        {
            ChangeMemberPriceViewModel model = this.DataContext as ChangeMemberPriceViewModel;

            CheckBox cb = sender as CheckBox;

            if (null == cb)
            {
                return;
            }

            if (model.IsPayByCard)
            {
                model.IsPayByCard = false;
            }
            else
            {
                model.IsPayByCard = true;
            }
        }