Question

我有以下代码：

Me.ASPxMenu1.DataSource = New HierarchicalMenuItemCollection(New XPCollection(Of IMenuItem)(DirectCast(WebApplication.Instance.ObjectSpaceProvider.CreateObjectSpace(), XPObjectSpace).session,
                                               CType(New NullOperator("ParentItem"), CriteriaOperator),
                                               New SortProperty("Order", DB.SortingDirection.Ascending)))

在DirectCast中失败，在DevExpress 11.2中它是

Ctype(WebApplication.Instance.ObjectSpaceProvider.CreateObjectSpace(), ObjectSpace).Session

有人知道在DevExpress 12.2中如何做到这一点？感谢您提供任何帮助

Answer 1

回答自己的问题：

正确的方法是

Dim xpObjectSpaceProvider As New XPObjectSpaceProvider(ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString, Nothing)
Dim ObjectSpace As IObjectSpace = xpObjectSpaceProvider.CreateObjectSpace()

Me.ASPxMenu1.DataSource = New HierarchicalMenuItemCollection(New XPCollection(Of IMenuItem)(CType(ObjectSpace, XPObjectSpace).Session,
                                               CType(New NullOperator("ParentItem"), CriteriaOperator),
                                               New SortProperty("Order", DB.SortingDirection.Ascending)))

如何在DevExpress 12.2中从XPObjectSpace中提取会话？

1 个答案: