Expand all

[HelloWorld]

Hello,

This code below is from one of demo code from

TreeList - Forum with External Edit Form

ExpandItemToLevel() is using 50 which seems a random number!!
is there a way to find how many the level a item has to expand??

Thanks!!
case RadTreeList.ExpandCollapseCommandName:

//if the command is fired for a root item by the LinkButton inside it, all child items should be expanded

if ((e.Item as TreeListDataItem).HierarchyIndex.NestedLevel == 0 && e.CommandArgument.ToString() == "ExpandAll")

        {

            e.Canceled = true;

            if (!(e.Item as TreeListDataItem).Expanded)

             {

              ForumBoard.ExpandItemToLevel((e.Item as TreeListDataItem), 50);
  // 50 is a random number as Level to exand all I assume
  // is there a way to find how many level it has to expand??

               }

               else

                {

                 ForumBoard.CollapseAllItems();

                 }

           }

            EditFormPanel.Visible = false;

            break

[Eyup]

Hi Charlie,

Have you tried the ExpandAllItems method?
http://www.telerik.com/help/aspnet-ajax/treelist-server-side-basics.html
( Section Server-side Methods)

Hope this works for you. Looking forward to your reply.

Regards,
Eyup
Telerik

[HelloWorld]

I tried the ExpandAllItems method.
the method expands every rows.
I want to expand a particular item the user clicks to show every child items under the item.

Thanks.

[Eyup]

Hi Charlie,

I am afraid there is no way to tell the max nested level depth of the item without expanding its child items. Therefore, you will need to use the ExpandItemToLevel approach with a big int number which would be practically impossible to reach. The method recursively traverses and toggles the expanded state of the child items and it will stop when there are no more items to expand.

Hope the clarification was helpful.

Regards,
Eyup
Telerik