private void SourceButton_Click(object sender, RoutedEventArgs e) { OpenFileDialog openFileDialog = new OpenFileDialog { DefaultExt = Const.DafaultExtention, Filter = Const.DefaultFilter }; if (openFileDialog.ShowDialog() == true) { SourceLbl.Content = openFileDialog.FileName; SourceParametersList = OpenFile(openFileDialog.FileName); } if (SourceParametersList != null && TargetParametersList != null) { TableGrid.Visibility = Visibility.Visible; DataGrid.ItemsSource = GetList(SourceParametersList, TargetParametersList); ResultLbl.Content = ParametersViewModel.TotalStatusResult(SourceParametersList, TargetParametersList); } }