/// <summary>
/// Handles the EntityUpdating event of the ProductsDS control.
/// Used to trap the entity fields errors at the current ProductEntity
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="SD.LLBLGen.Pro.ORMSupportClasses.CancelableDataSourceActionEventArgs"/> instance containing the event data.</param>
protected void ProductsDS_EntityUpdating(object sender, CancelableDataSourceActionEventArgs e)
{
// the entity involved
ProductEntity entityToEvaluate = (ProductEntity)e.InvolvedEntity;
// Retrieve the fields errors from the entity. This will return a semicolon-separated list containing the info.
string errors = entityToEvaluate.GetEntityFieldsErrors();
// there are errors, so cancel the update so the user can fix them.
if (errors != string.Empty)
{
e.Cancel = true;
ShowEntityErrors(errors);
}
else
{
HideEntityErrorControls();
}
}
/// <summary>
/// Handles the EntityDeleting event of the LLBLGenProDataSource.
/// Used to delete order details related to the order being deleted.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void OrdersDS_EntityDeleting(object sender, CancelableDataSourceActionEventArgs e)
{
//Get the Order to be deleted
OrderEntity orderToDelete = (OrderEntity)e.InvolvedEntity;
try
{
// directly delete all order details with a matching OrderId
DataAccessAdapter adapter = new DataAccessAdapter();
adapter.DeleteEntitiesDirectly("OrderDetailEntity", new RelationPredicateBucket(OrderDetailFields.OrderId == orderToDelete.OrderId));
}
// All exceptions are swallowed here, it's outside the scope of this example to handle different exceptions.
// If you are going to use this code in production, it's a best practice to add proper exception handling.
catch
{
// cancel the Order deletion, if anything wrong happened while deleting its related order-details.
e.Cancel = true;
}
}