private void radTreeView1_NodesNeeded(object sender, Telerik.WinControls.UI.NodesNeededEventArgs args)
{
if (args.Parent == null)
{
LoadRoot(args.Nodes);
return;
}
if (args.Parent.Text == "Favorites")
{
LoadFavorites(args.Nodes);
}
else if (args.Parent.Text == "Libraries")
{
LoadLibraries(args.Nodes);
args.Parent.Expand();
}
else if (args.Parent.Text == "Computer")
{
LoadComputer(args.Nodes);
}
else if (args.Parent.Text == "Network")
{
LoadNetwork(args.Nodes);
}
else if (args.Parent.Text == "System")
{
LoadSystem(args.Nodes);
}
}
public virtual void Load()
{
if (this.items.Count > 0 || this.owner.TreeViewElement == null)
{
return;
}
bool rootLevel = this.owner is RadTreeViewElement.RootTreeNode;
bool innerMode = !this.owner.TreeViewElement.FullLazyMode && (this.owner.Parent == null || this.owner.Parent.Expanded);
if (rootLevel || innerMode || this.owner.Expanded)
{
this.owner.NodesLoaded = true;
this.owner.TreeViewElement.BeginUpdate();
NodesNeededEventArgs args = new NodesNeededEventArgs((this.owner is RadTreeViewElement.RootTreeNode) ? null : this.owner, this.items);
this.owner.TreeViewElement.OnNodesNeeded(args);
this.owner.TreeViewElement.EndUpdate(false, RadTreeViewElement.UpdateActions.Resume);
this.owner.NodesLoaded = false;
}
}
