ClearCanvas.Desktop.View.WinForms.BindingTreeView._treeCtrl_BeforeExpand C# (CSharp) Method

_treeCtrl_BeforeExpand() private method

When the user is about to expand a node, need to build the level beneath it
private _treeCtrl_BeforeExpand ( object sender, System.Windows.Forms.TreeViewCancelEventArgs e ) : void
sender object
e System.Windows.Forms.TreeViewCancelEventArgs
return void
        private void _treeCtrl_BeforeExpand(object sender, TreeViewCancelEventArgs e)
        {
            BindingTreeNode expandingNode = (BindingTreeNode)e.Node;
            if (!expandingNode.IsSubTreeBuilt)
            {
                expandingNode.BuildSubTree();
            }
        }