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

            this.IssueInfoGrid_.Children.Clear();
            this.IssueInfoGrid_.Children.Add(this.viewModel_.Excel_issueInfoViewModel_.view());

            this.FxExchangeLegGrid_.Children.Clear();
            this.FxExchangeLegGrid_.Children.Add(this.viewModel_.Fx_exchangeLegViewModel_.view());
        }
        private void ViewModelChanged(object sender, DependencyPropertyChangedEventArgs e)
        {
            this.viewModel_ = this.DataContext as Excel_fxForwardViewModel;

            this.IssueInfoGrid_.Children.Clear();
            this.IssueInfoGrid_.Children.Add(this.viewModel_.Excel_issueInfoViewModel_.view());

            this.FxExchangeLegGrid_.Children.Clear();
            this.FxExchangeLegGrid_.Children.Add(this.viewModel_.Fx_exchangeLegViewModel_.view());
        }