Hello!
I get an exception Exception as soon as I click on the dragged header of the RadGridView and I am not sure where I should look for the error. Searching the net did not bring me any new clues.
I can reproduce the error every time:
Right on this click I get the following exception:
(Unfortunatelly the exception text is in German, but simply translates into: "System.InvalidCastException: Unable to cast object of type A to type B. ")
I am using RadControls for Silverlight Q2 2011, Product version 11.2.712.0.
Do you have any ideas?
(Edited for correctiong the exception text)
I get an exception Exception as soon as I click on the dragged header of the RadGridView and I am not sure where I should look for the error. Searching the net did not bring me any new clues.
I can reproduce the error every time:
- I do a search and bind the results (ObservableCollection) to the ItemsSource property of the grid.
- In the UI, I drag one of the columns onto the "Drag a column header here and drop it here to group by that column" area
- After that I simply click once on that column header that I just dropped there.
Right on this click I get the following exception:
System.InvalidCastException: Das Objekt des Typs StyleSearchWeb kann nicht
in
Typ Telerik.Windows.Data.IGroup umgewandelt werden.
bei Telerik.Windows.Data.FuncExtensions.<>c__DisplayClass1`2.<ToUntypedFunc>b__0(Object item)
bei Telerik.Windows.Data.KeyedCollection.GetKeyByItem(Object value)
bei Telerik.Windows.Data.KeyedCollection.IndexOf(Object value)
bei Telerik.Windows.Data.QueryableCollectionView.InternalIndexOf(Object item)
bei Telerik.Windows.Data.QueryableCollectionView.TryRestorePreviousCurrency()
bei Telerik.Windows.Data.QueryableCollectionView.InitializeCurrencyOnRefresh()
bei Telerik.Windows.Data.QueryableCollectionView.RefreshOverride()
bei Telerik.Windows.Data.QueryableCollectionView.RefreshInternal()
bei Telerik.Windows.Data.QueryableCollectionView.RefreshOrDefer()
bei Telerik.Windows.Data.QueryableCollectionView.InvalidatePagingAndRefresh()
bei Telerik.Windows.Data.QueryableCollectionView.OnGroupDescriptorsItemChanged(Object sender, ItemChangedEventArgs`1 e)
bei Telerik.Windows.Data.ObservableItemCollection`1.RaiseGenericItemChanged(ItemChangedEventArgs`1 e)
bei Telerik.Windows.Data.ObservableItemCollection`1.OnItemChanged(ItemChangedEventArgs`1 e)
bei Telerik.Windows.Data.ObservableItemCollection`1.OnItemPropertyChanged(Object sender, PropertyChangedEventArgs e)
bei System.ComponentModel.PropertyChangedEventHandler.Invoke(Object sender, PropertyChangedEventArgs e)
bei Telerik.Windows.Data.DescriptorBase.OnPropertyChanged(PropertyChangedEventArgs args)
bei Telerik.Windows.Data.DescriptorBase.OnPropertyChanged(String propertyName)
bei Telerik.Windows.Data.GroupDescriptorBase.set_SortDirection(Nullable`1 value)
bei Telerik.Windows.Data.GroupDescriptorExtensions.CycleGroupSortDirection(IGroupDescriptor descriptor)
bei Telerik.Windows.Controls.GridView.GridViewDataControl.PerformGroupSort(IGroupDescriptor descriptor)
bei Telerik.Windows.Controls.GridView.GridViewDataControl.OnGroupPanelCellRequestGroupAction(Object sender, RequestGroupActionEventArgs e)
(Unfortunatelly the exception text is in German, but simply translates into: "System.InvalidCastException: Unable to cast object of type A to type B. ")
I am using RadControls for Silverlight Q2 2011, Product version 11.2.712.0.
Do you have any ideas?
(Edited for correctiong the exception text)