private void ViewModelChanged(object sender, DependencyPropertyChangedEventArgs e)
        {
            this.viewModel_ = this.DataContext as Excel_standardSwapParaViewModel;

            this.UnderlyingParaInfoGrid_.Children.Clear();
            this.UnderlyingParaInfoGrid_.Children.Add(this.viewModel_.Excel_underlyingCalcInfo_paraViewModel_.view());

            this.DiscountCurveInfoGrid_.Children.Clear();
            this.DiscountCurveInfoGrid_.Children.Add(this.viewModel_.Excel_discountCurve_paraViewModel_.view());
        }
        private void ViewModelChanged(object sender, DependencyPropertyChangedEventArgs e)
        {
            this.viewModel_ = this.DataContext as Excel_standardSwapParaViewModel;

            this.UnderlyingParaInfoGrid_.Children.Clear();
            this.UnderlyingParaInfoGrid_.Children.Add(this.viewModel_.Excel_underlyingCalcInfo_paraViewModel_.view());

            this.DiscountCurveInfoGrid_.Children.Clear();
            this.DiscountCurveInfoGrid_.Children.Add(this.viewModel_.Excel_discountCurve_paraViewModel_.view());
        }