May sounds very simple, but have you tried changing the sort from Default to Ascending, I've just been having a similar problem and that was my issue.

It seems that even if you are not using the sorting, you still need to tell it to do some.

Ok, thanks for this advice.

I could you please show me a piece of code of how to set the SortComparer on a column and how to trigger the custom sorting (after the column has been sorted by name for example) using information in the TreeNodeTag of each node ?

For now I have implemented my sorting using the IComparer (on a list this time) by myself with this recursive function :

private void TreeRecursiveSort(UltraTreeNode node)
        {
            List<UltraTreeNode> listOfNodes = new List<UltraTreeNode>();
            foreach (UltraTreeNode childNode in node.Nodes)
                listOfNodes.Add(childNode);

            listOfNodes.Sort(new NodeSorter());

            node.Nodes.Clear();

            foreach (UltraTreeNode childNode in listOfNodes)
                node.Nodes.Add(childNode);

            foreach (UltraTreeNode childNode in node.Nodes)
                TreeRecursiveSort(childNode);
        }

Hello Brian,

I'm still trying to perform my sorting. I have also checked out the example shipped with your product. It looks simple and it works. I can not see any differences to my code. Like mentioned before, my tree is setup as follows:

- ViewStyle=Standard

- Bound to DataSet to a self referncing table. In the initializeDataNode Event I assign a class-instance to the tag object (the tree should be sorted based on this tag object).

- On ColumnSetGenerated-Event I assign the NodeTextColumn and I set the SortComparer property of the NodeTextColumn to mySortCpmparer-Class which implements the IComparer Interface

- After the property form is closed I set the Text of the NodeTextColumn and call tree.RefreshSort()

Are there other properties that I have to set to perform sorting? How I can change the node text?

Thanks for any help.

Markus

You have to assing the IComparer implementation to the column's SortComparer property. You can assing the same instance to multiple columns, assuming the implementation acounts for the different columns that are players in the sort criteria.