Question

我在wpf项目中有一个usercontrol，它执行一个需要很长时间的select查询这是代码

Entities1 context = new Entities1();                        
 ObservableCollection<E> _E = new ObservableCollection<E>();
CollectionViewSource ECollection = new CollectionViewSource();
ECollection = (CollectionViewSource)this.Resources["EResource"];
 this._E = new ObservableCollection<E>
            (from e in context.Es
             join eg in context.EQ_Gs on e.EQ_G_ID equals eg.EQ_G_ID
             join u in context.Us on e.U_ID equals u.U_ID
             join b in context.Bs on e.B_ID equals b.B_ID
             select e);           
            ECollection.Source = this._E;
            this.Grid_E.ItemsSource = this._E;
            this.Grid_E.DataContext = this._E;
            this.DataContext = ECollection;

表E有30000条记录加载用户控件需要2.5分钟如果你有任何想法来提高性能，它会帮助我很多提前致谢和问候

Answer 1

谢谢亲爱的杰夫·梅尔卡多

我更改了查询并使用了热切的加载查询，它帮助了很多并减少了加载时间。 var query = context.E.include("B").tostring()

LINQ to ENTITY选择查询执行需要很长时间 - WPF

1 个答案: