Filtering TreeViews

[Bra]

Hello,

I would like to filter a TreeView, but I can't find any solution for Xamarin.Forms. Is it possible or not ?

Thank you :)

[Lance | Manager Technical Support]

Hi Bra,

The RadTreeView doesn't use FilterDescriptors or internal data segregation. Therefore, you can use normal filtering with LINQ.

For example:

//---------------------Setup------------------------- //
// Keep a separate ObservableCollection for TreeView

ObservableCollection<Car> originalData = ...;
ObservableCollection<Car> tvData = new ObservableCollection<Car>();
MyTreeView.ItemsSource = tvData;

//---------------------All Items---------------------- //

// show all the items in the Treeview
foreach(var car in originalData)
   tvData.Add(car);

//-------------------Filtered Items---------------------- //

// Clear the previous list
tvData.Clear();

// filter out the items you want
var filteredCars = originalData.Where(i => i.Make == "Mercedes Benz");

// show them in the Treeview
foreach(var car in filteredCars) 
   tvData.Add(car);

 

Regards,
Lance | Manager Technical Support
Progress Telerik

[Bra]

Hi,

 

OK, I will implement my own filter. Thank you for your answer and the little example :)