DataFormatString only works for top level in TreeListView

[Manuel]

I have just updated the .dlls from 2020.1 to the latest version (2025.1.211).

Now, the formatting only works for the top level.

Before:

After:

The blue rows are top level and work as expected, any row in any level below does not use the format string.

The TreeListView is defined with an ItemsSource:

<telerik:RadTreeListView
      (...)
      ItemsSource="{Binding ... }" >

The columns are defined like this:

<telerik:GridViewDataColumn
       DataMemberBinding="{Binding ...}"
       IsReadOnlyBinding="{Binding ...}"
       DataFormatString="{}{0:#,###;-#,###;#}"
       CellStyleSelector="{StaticResource CellStyleSelector}"
       ShowDistinctFilters="False"
       Width="80"
       Header="...">
       <telerik:GridViewDataColumn.Footer>
           <TextBlock
               Text="{Binding ...}" />
        </telerik:GridViewDataColumn.Footer>
</telerik:GridViewDataColumn>

I have not found anything new in the documenation. Am I missing something?

Thanks and best regards,
Manuel

[Stenly]

Hello Manuel,

We are aware of this behavior and have a bug report in our feedback portal regarding it:

TreeListView: DataFormatString property of the columns is not applied on child rows

Generally, this behavior has been fixed with the 2025.2.521 version of our assemblies, which was released today.

With this being said, would it be possible to upgrade to this version and see if this behavior is resolved?

Regards,
Stenly
Progress Telerik

[Manuel]

Hello Stenly,

I can confirm that it works again with the latest assemblies - thank you!

 

Best regards,
Manuel