Hi,
I'm trying to migrate an app that was written in WPF using default tree view to Telerik UI WinForms RadTreeView. For the default tree that has been used previously I had an ObservableCollection to which I could add items and the change would be displayed in the TreeView immediately without me triggering any update method. However, with the Telerik's solution, when I set the DataSource to the observable collection, no change is visible even though that observable collection has been modified.
The final result that needs to be achieved is to be able to display folder structure on a disc. Now obviously, I don't want to load a folder and all of its subfolders at once, but rather only load the content when the user decides to open the given folder.
Can this be achieved using ObservableCollection and without the need of triggering some sort of update method?
Thanks
3 Answers, 1 is accepted
Thank you for writing.
Data binding in Windows Forms behaves differently compared to WPF. Please refer to the following MSDN resources:
- Change Notification in Windows Forms Data Binding
- How to: Implement the INotifyPropertyChanged Interface
I am sending you an example of a RadTreeView bound to a BindingList collection of models implementing the INotifyPropertyChanged interface. Another example is also available in our documentation: Load On Demand with CRUD operations.
I hope this helps. Should you have further questions please do not hesitate to write back.
Regards,
Hristo Merdjanov
Telerik
Rank 1
HI Team
Can you please share sample with multilevelTreeView with BindingList.
Person1
Person1.1
Person 1.2
Person 1.2.1
Person 1.2.2
Person 2
Person 2.1
Hello, Srinivas,
The provided tree view structure can be achieved by binding to self-referencing data. The following help article demonstrates a sample approach: https://docs.telerik.com/devtools/winforms/controls/treeview/data-binding/binding-to-self-referencing-dataEven though the example shows a DataTable, it can be easily adopted to a BindingList of objects. Create a class, e.g. Item, where each item has similar properties as the columns in the DataTable. The important part here is to have a ParentID property and an ID one which to be used for specifying the ParentMember and ChildMember in RadTreeView. Thus, each Item will know its ID and who is its parent Item.
I hope this information helps. If you need any further assistance please don't hesitate to contact me.
Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik
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