Just that. Is there an "out of the box" grouping functionality in TreeList component?? If it is not possible, do you have any suggestions on how I can accomplish this?
The treelist is already a visualization of hierarchical data. This means that it is effectively grouped:
Thus, if the user were able to drag columns to group, there would be quite strange results:
If you are looking to let the users choose how to group the data to see different hierarchies in it I recommend you consider the grid component that can already do that: https://demos.telerik.com/blazor-ui/grid/grouping. You can even use its state to set grouping from code.
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