/// <summary>
/// Update an entity of Generic Parameter in the corresponding table in the database.
/// </summary>
/// <typeparam name="TBusinessEntity">An Entity type to insert the entity object in.</typeparam>
/// <param name="entity">An entity object to be updated in the table corresponding to Entity type.</param>
/// <returns>New entity object after update it in the database.</returns>
/// <exception cref="BusinessRuleException">When a constraints on database level is voilated due to current UPDATE statement.</exception>
/// <exception cref="RepositoryException">When an error on the database level is occurred and couldn't be recovered.</exception>
public virtual TBusinessEntity Update <TBusinessEntity>(TBusinessEntity entity)
where TBusinessEntity : class, new()
{
try
{
using (ShoppingListContext context = new ShoppingListContext())
{
TBusinessEntity updatedEntity = context.UpdateGraph <TBusinessEntity>(entity);
int erc = context.SaveChanges();
var result = erc > 0 ? updatedEntity : null;
if (result != null)
{
// update the generation
Cache.NextGeneration <TBusinessEntity>();
}
return(result);
}
}
catch (Exception ex)
{
throw ThrowHelper.ReThrow <TBusinessEntity>(ex);
}
}
/// <summary>
/// Delete entities of Generic Parameter from the corresponding table in the database.
/// </summary>
/// <typeparam name="TBusinessEntity">An Entity type to delete the entity object from.</typeparam>
/// <param name="entities">An entities objects to be deleted from the table corresponding to Entity type.</param>
/// <returns>True, if object deleted successfully. False, otherwise.</returns>
/// <exception cref="BusinessRuleException">When a constraints on database level is voilated due to current DELETE statement.</exception>
/// <exception cref="RepositoryException">When an error on the database level is occurred and couldn't be recovered.</exception>
public bool Delete <TBusinessEntity>(IEnumerable <TBusinessEntity> entities)
where TBusinessEntity : class, new()
{
try
{
using (ShoppingListContext context = new ShoppingListContext())
{
foreach (TBusinessEntity item in entities)
{
var i = context.UpdateGraph(item);
context.Set <TBusinessEntity>().Attach(i);
context.Set <TBusinessEntity>().Remove(i);
}
int erc = context.SaveChanges();
var result = erc > 0;
if (result == true)
{
// update the generation
Cache.NextGeneration <TBusinessEntity>();
}
return(result);
}
}
catch (Exception ex)
{
throw ThrowHelper.ReThrow <TBusinessEntity>(ex);
}
}