Custom number sorting

[MiddleTommy]

I am trying to find a way to have the TreeView sort the HierarchicalDataTemplate items. I can do this with a IValueConverter that changes the bound Items to a CollectionView with SortDescriptions however I need a custom sort. I want to sort strings Numerically

1A
2A
3A
10A
20A 

Normal sorting organizes these as

1A
10A
2A
20A
3A 

How can I get this custom sorting? I have an IComparer<string> that will provide the proper mechanism for the sorting but cant find where to plug it into.

[Kiril Stanoev]

Hi Tommy,

I found couple of links that might be useful in your scenario:

How to achieve Natural(human alpha-numeric ) Sorting, for silverlight datagrids using ViewModel? 

Natural Sorting in C#

Take a look at them. In addition, please take a look at the attached sample which demonstrates one possible solution to your scenario. Let me know if you need further assistance.

Greetings,
Kiril Stanoev
the Telerik team

[MiddleTommy]

I solved this by modifying a basic implementation of ICollectionView I found at
http://www.scottlogic.co.uk/blog/colin/2010/03/binding-a-silverlight-3-datagrid-to-dynamic-data-via-idictionary-updated/ 
Then in the HierarchicalDataTemplate I put a converter on the ItemsSource that wraps the bound items in a collection view.