public void AddEmployees(Territory territory, List <Employee> employes)
{
using (VirtualStoreContext context = new VirtualStoreContext())
{
//marcamos el territorio para que no reciba cambios
context.Entry(territory).State = EntityState.Unchanged;
if (territory.Employees == null)
{
territory.Employees = new List <Employee>();
}
//recorremos cada empleado que se quiera asociar
employes.ForEach(x =>
{
//el empleado tampoco debe recibir cambios
context.Entry(x).State = EntityState.Unchanged;
//asociamos a la colecion de empleados del territorio el nuevo item
//este si recibira cambios
territory.Employees.Add(x);
});
context.SaveChanges();
}
}
public virtual void Create(T entity, List <Expression <Func <T, object> > > unchangeProp)
{
// se obtiene la lista de propiedades que deben marcarse con el estado Unchanged
List <string> unchangelist = unchangeProp.Select(x => ((MemberExpression)x.Body).Member.Name).ToList();
using (VirtualStoreContext context = new VirtualStoreContext())
{
context.Set <T>().Add(entity);
if (unchangeProp != null)
{
// se toma la instancia del objeto que esta asignada a la propiedad
// y se asigna el estodo Unchanged
foreach (string property in unchangelist)
{
PropertyInfo propertyInfo = typeof(T).GetProperty(property);
var value = propertyInfo.GetValue(entity, null);
context.Entry(value).State = EntityState.Unchanged;
}
}
context.SaveChanges();
}
}
public void Delete(T entity)
{
using (VirtualStoreContext context = new VirtualStoreContext())
{
context.Entry(entity).State = EntityState.Deleted;
context.SaveChanges();
}
}
public void Delete(Expression <Func <T, bool> > predicate)
{
using (VirtualStoreContext context = new VirtualStoreContext())
{
var entities = context.Set <T>().Where(predicate).ToList();
entities.ForEach(x => context.Entry(x).State = EntityState.Deleted);
context.SaveChanges();
}
}