private bool Validate(Components componets)
{
using (var db = GetDataContext())
{
var entity = db.Components.FirstOrDefault(e => e.Type == componets.Type && e.Brand.ToUpper() == componets.Brand.ToUpper() && e.Specification.ToUpper() == componets.Specification.ToUpper());
return entity == null ? true : false;
}
}
public int Add(Components components)
{
if (!Validate(components))
{
throw new ArgumentException("存在相同类型、品牌、规格的部件");
}
using (var db = GetDataContext())
{
db.Components.Add(components);
db.SaveChanges();
return components.ID;
}
}