public List <T> Filtrar(Expression <Func <T, bool> > predicate)
{
using (EContext context = new EContext())
{
return((List <T>)context.Set <T>().Where(predicate).ToList());
}
}
public T Obtener(Expression <Func <T, bool> > predicate)
{
using (EContext context = new EContext())
{
return(context.Set <T>().FirstOrDefault(predicate));
}
}
public List <T> Listar()
{
using (EContext context = new EContext())
{
return((List <T>)context.Set <T>().ToList());
}
}
public bool Eliminar(Expression <Func <T, bool> > predicate)
{
bool blResultado = false;
using (EContext context = new EContext())
{
try
{
var entities = context.Set <T>().Where(predicate).ToList();
entities.ForEach(x => context.Entry(x).State = EntityState.Deleted);
context.SaveChanges();
blResultado = true;
}
catch (Exception ex)
{
blResultado = false;
throw new Exception(ex.Message);
}
}
return(blResultado);
}
public bool Crear(T entity)
{
bool blResultado = false;
using (EContext context = new EContext())
{
try
{
context.Set <T>().Add(entity);
context.SaveChanges();
blResultado = true;
}
catch (Exception ex)
{
blResultado = false;
throw new Exception(ex.Message);
}
}
return(blResultado);
}
public List <T> Filtrar(Expression <Func <T, bool> > predicate, List <Expression <Func <T, object> > > includes)
{
List <string> includelist = new List <string>();
foreach (var item in includes)
{
MemberExpression body = item.Body as MemberExpression;
if (body == null)
{
throw new ArgumentException("The body must be a member expression");
}
includelist.Add(body.Member.Name);
}
using (EContext context = new EContext())
{
DbQuery <T> query = context.Set <T>();
includelist.ForEach(x => query = query.Include(x));
return((List <T>)query.Where(predicate).ToList());
}
}
