Is it possible to have a cell span multiple columns in an UltraTree with ViewStyle = Outlook ?
As far as I know UtraTree has no implemented property that you could set to merge cells. But you could achieve this with creation filter. Go through all cells in a node and if two cells has same value(or maybe you would be able to use some other criteria), then make first cell UIElement with size of both widths of first and second cell. I implemented my suggestion in a small sample and I am posting it in this thread. So run the sample and let me know if this is what you are looking for.
Let me know if you have any further questions.
Ok. It worked. But I have to explicitly remove the cells that my extended cell should cover or else they are drawn over that extended cell.
Thanks a lot Hristo.
Yes it will be good to remove covered CellUIElements.
Let me know if you need assistance to implement this.