private void LoadGrid()
        {
            try
            {
                dgDrawing.ItemsSource = null;

                if (txtFilter.Text != string.Empty)
                {
                    dgDrawing.ItemsSource = dwService.GetAll(txtFilter.Text);
                }
                else
                {
                    dgDrawing.ItemsSource = dwService.GetAll();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message + " - Erro ao consultar dados", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }