I am using the TreeListView to display a class hierarchy. All classes have a base class called Node. Many parents have children of different types but they are all of type Node.
The tree displays just fine until I filter on the "FC" column then I get the following exception:
Additional information: Unable to cast object of type 'TMW.i61850.Model.DataSet' to type 'TMW.i61850.Model.LogicalDevice'.
The LogicalDevice happens to be the root item in the tree in this case and the DataSet happens to be a grandchild of the LogicalDevice. Both DataSet and LogicalDevice are of type Node.
All Column binding is bound to properties that only exist on the Node class.
<telerik:RadTreeListView ItemsSource="{Binding}" x:Name="TreeView" Grid.Row="1" IsFilteringAllowed="True" AutoGenerateColumns="False" CanUserDeleteRows="False" CanUserInsertRows="False"
CanUserFreezeColumns="False" RowIndicatorVisibility="Collapsed" BeginningEdit="BeginningEdit" CellEditEnded="CellEditEnded" DistinctValuesLoading="TreeView_DistinctValuesLoading">
<telerik:RadTreeListView.ChildTableDefinitions>
<telerik:TreeListViewTableDefinition ItemsSource="{Binding Children}"/>
</telerik:RadTreeListView.ChildTableDefinitions>
<telerik:RadTreeListView.Columns>
<telerik:GridViewDataColumn Header="Name" Width="300" DataMemberBinding="{Binding Name}" />
<telerik:GridViewDataColumn Header="Value" Width="200" DataMemberBinding="{Binding Value}" />
<telerik:GridViewDataColumn Header="FC" Width="200" DataMemberBinding="{Binding FC}" />
</telerik:RadTreeListView.Columns>
</telerik:RadTreeListView>
1 Answer, 1 is accepted
I tried reproducing the issue you have described but unfortunately did not observe a similar exception in an analogous scenario. The best approach would be if you can provide us with a sample project that shows the undesired behavior so we can investigate it in details. Please raise a ticket with such so we can advise you accordingly.
Regards,
Stefan Nenchev
Telerik by Progress