// shows the form in edit modus
        // links:
        //  docLink: http://sql2x.org/documentationLink/49afd26c-4f21-4992-967b-be190eacef77
        public void ShowAsEdit(System.Guid productAttributeId)
        {
            var service = new CrudeProductAttributeServiceClient();

            _isNew = false;
            try {
                _contract = service.FetchByProductAttributeId(productAttributeId);
                productAttributeRefCombo.Text     = _contract.ProductAttributeRcd != null ? _contract.ProductAttributeRcd : String.Empty;
                productAttributeUnitRefCombo.Text = _contract.ProductAttributeUnitRcd != null ? _contract.ProductAttributeUnitRcd : String.Empty;
                textBoxValue.Text           = _contract.Value;
                _contract.DateTime          = DateTime.UtcNow;
                dateTimePickerDateTime.Text = _contract.DateTime.ToString();

                Show();
            } catch (Exception ex) {
                if (ex == null)
                {
                }
                else
                {
                    System.Diagnostics.Debugger.Break();
                }
            } finally {
                service.Close();
            }
        }
        // bring up edit form for ProductAttribute
        // links:
        //  docLink: http://sql2x.org/documentationLink/d7ff032d-3bcf-438f-9850-900ca0ebca98
        public void ShowAsEdit(System.Guid productAttributeId)
        {
            var service = new CrudeProductAttributeServiceClient();

            _isNew = false;
            try {
                _contract = service.FetchByProductAttributeId(productAttributeId);
                productAttributeRefCombo.Text     = _contract.ProductAttributeRcd != null ? _contract.ProductAttributeRcd : String.Empty;
                productAttributeUnitRefCombo.Text = _contract.ProductAttributeUnitRcd != null ? _contract.ProductAttributeUnitRcd : String.Empty;
                textBoxValue.Text           = _contract.Value;
                _contract.DateTime          = DateTime.UtcNow;
                dateTimePickerDateTime.Text = _contract.DateTime.ToString();

                RefreshProductAttribute();
                Show();
            } catch (Exception ex) {
                MessageBox.Show(ex.Message);
            } finally {
                service.Close();
            }
        }