Traversing the Project Tree

This example shows how to traverse the Project Tree for a specific item. This example uses the IProjectTree61 (FindItem, GetItemName, HiddenGroupName) property and methods.

 

privatevoid ScanTree()

        {

            try

            {

                var sgworld = new SGWorld61();

                MessageBox.Show("Click ok to find Vermont item by its path in the tree");

                var id = sgworld.ProjectTree.FindItem("New England\\States\\Vermont");

                if(id > 0)

                    MessageBox.Show("Found Vermont with id=" + id);

                else

                    MessageBox.Show("New England\\States\\Vermont does not exist in tree");

                // root is the first visible item in tree.

                var root = sgworld.ProjectTree.GetNextItem(0, ItemCode.ROOT);

               

                var tree = BuildTreeRecursive(root, 1);

                MessageBox.Show(tree);

            }

            catch (Exception ex)

            {

                MessageBox.Show("Unexpected error: " + ex.Message);

            }

        }

        private string BuildTreeRecursive(int current, int indent)

        {

            var sgworld = new SGWorld61();

            // build padding

            var padding = new string('-', indent * 3);

            var result = string.Empty;

            // iterate over all siblings of current node

            while (current > 0)

            {

                // append node name to the tree string

                var currentName = sgworld.ProjectTree.GetItemName(current);

                result += padding + currentName + Environment.NewLine;

                // if current node is group, recursively build tree from its first child;

                if (sgworld.ProjectTree.IsGroup(current))

                {

                    var child = sgworld.ProjectTree.GetNextItem(current, ItemCode.CHILD);

                    result += BuildTreeRecursive(child, indent + 1);

                }

                // move to next sibling

                current = sgworld.ProjectTree.GetNextItem(current, ItemCode.NEXT);

            }

            return result;