I have a DataSet like this:

NavigationNode      ParentID

      A                        NULL

      B                        NULL

      C                        A

      D                        B

      E                         D

Now i want this displayed in a UltraTree like this:

-A

    -C

-B

    - D

         - E

Hi,

The tree in this case is accurately reflecting the structure of your data source. All of the rows exist in the root-level table and then the relationship creates the child nodes.

So what you can do in a case like this is simply hide the root-level nodes that are children. A good place to do this is in the tree's InitializeDataNode event. If you installed the samples with NetAdvantage, there's a sample called "DataBinding (Recursive)" that demonstrates this technique. But basically, the event fires for each node and you examine the node to see if it's a root node and then examine the ParentId. If the node is at the root level (has no parent node) and has a ParentId, then you hide the node.

Here's the code from the sample which uses SupervisorID as the parent ID, but you get the idea.

            // Make sure that only the highest-level employees show up at
            // the root level of the tree.
            if (e.Node.Parent == null &&
                e.Node.Cells["SupervisorID"].Value != DBNull.Value)
            {
                e.Node.Visible = false;
                return;
            }