“工作单位”何时不再是“单位”?哪个场景在资源上更好?第一个创建一个连接,而第二个创建 4 个。
using (DataContext dc=new DataContext)
{
var orders= from o in dc.orders
select ( new Product { property a= from a in ..join... select x,
property b= from b in ..join... select y,
property c= from c in ..join... select z.}
)
}
或者
using (DataContext dc=new DataContext)
{
var orders= from o in dc.orders
select ( new Product { property a = GetPropertyA(),
property b = GetPropertyB(),
property c = GetPropertyC()}
)
}