Configurator.HostsTreeViewer.TreeView1OnDragDrop C# (CSharp) Method

        private void TreeView1OnDragDrop(object sender, DragEventArgs e)
        {
            var nodeToDropIn = this.treeView.GetNodeAt(this.treeView.PointToClient(new Point(e.X, e.Y)));
            if (nodeToDropIn == null)
            {
                return;
            }
            var hostname = "";
            object roleName = e.Data.GetData(typeof(string));
            if (roleName == null)
            {
                return;
            }

            if (nodeToDropIn.Level == 1)
            {
                hostname = nodeToDropIn.Text;
            }

            if (nodeToDropIn.Level == 2)
            {
                nodeToDropIn = nodeToDropIn.Parent;
                hostname = nodeToDropIn.Text;
            }

            if ((hostname != string.Empty) && (roleName.ToString() != string.Empty))
            {
                nodeToDropIn.Nodes.Add(roleName.ToString());
                this.controller.AddRoleToHost(hostname, roleName.ToString());
            }

            OnChanged(EventArgs.Empty);
        }