//Metodo eliminar
public void Eliminar()
{
try
{
using (var db = new Model_Entity_1())
{
db.Entry(this).State = EntityState.Deleted;
db.SaveChanges();
}
}
catch (Exception ex)
{
throw;
}
}
//Metodo guardar
public void Guardar()
{
try
{
using (var db = new Model_Entity_1())
{
if (this.categoria_id > 0)//cuando la llave primaria es identity solamante
{
db.Entry(this).State = EntityState.Modified;
}
else
{
db.Entry(this).State = EntityState.Added;
}
db.SaveChanges();
}
}
catch (Exception ex) {
throw;
}
}