Convert Items to IEnumerable<> or List<>

[StrandedPirate]

Hi, got myself a TreeListView on my page with the ItemSource bound to a collection of poco objects. How do I convert the tree view's Items property back into the collection of strongly typed objects? I want to get the collection back strongly typed so I can use linq to query it as shown here:

 

 

IEnumerable<UserPermission> permissionList = (IEnumerable<UserPermission>)OperationList.Items;

 

 

 

UserPermission permission = permissionList.Where(a => a.Permission == Enum.Parse(a.Permission.GetType(), acl.Permission.ToString(), true)).FirstOrDefault();

This currently explodes with:

 

Cannot cast '((Telerik.Windows.Controls.DataControl)(this.OperationList)).Items' (which has an actual type of 'Telerik.Windows.Data.DataItemCollection') to 'System.Collections.Generic.IEnumerable<MyNamespace.UserPermission>'

[StrandedPirate]

Boom son.

 

IEnumerable<UserPermission> permissionList = OperationList.Items.Cast<UserPermission>();