Similar to what is offered with the RadGrid, I want to be able to visualy group columns headers with the TreeList.
Unfortunately, it seems that this feature is not proposed out-of-box and I don't manage to find a way to enligh my quest.
I tried to customize the treelist. I inherit from it. I override the method RenderBeginTag of the class TreeListHeaderItem to add my own html table row above the generated header row.
But after this, RadTreeList.get_columns() doesn't work anymore, indeed it bases its logic on this newly added row.
Is there another way to customize the Treelist headers and allow column spanning?
Rgds,
Robert
Unfortunately, it seems that this feature is not proposed out-of-box and I don't manage to find a way to enligh my quest.
I tried to customize the treelist. I inherit from it. I override the method RenderBeginTag of the class TreeListHeaderItem to add my own html table row above the generated header row.
But after this, RadTreeList.get_columns() doesn't work anymore, indeed it bases its logic on this newly added row.
Is there another way to customize the Treelist headers and allow column spanning?
Rgds,
Robert