public void SavePDFFile(object sender, RoutedEventArgs e) { if (facade.CheckAllResources()) { if (string.IsNullOrEmpty(this.savePath)) { lblErrorMessage.Content = "Please select save path!"; } else { lblErrorMessage.Content = String.Empty; facade.Export(this.savePath); // } } else { lblErrorMessage.Content = "Please fill all resources!"; } }