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LoadOnDemand Enabled and Expanded Indexes

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TreeList

This is a migrated thread and some comments may be shown as answers.

Lukasz Kalbarczyk asked on 12 Dec 2011, 05:38 PM

Here we can see a part of my tree:

a
|- b
|- c
|- d
|- e

I'm expanding d:

a
|- b
|- c
|- d
| |- f
|- e

I'm expanding f:

a
|- b
|- c
|- d
| |- f
| | |- g
|- e

Now I'm expandng c:

a
|- b
|- c
| |- h
| | |- i
|- d
| |- f
|- e

f is no more expanded. Instead of f, h was expanded and I see i under h instead of g under f.

All branches are bound with needdatasource events: NeedDataSource or ChildItemsDataBind for children.

The only way to fix it is:

on Page_Load event: to find all items connected to ExpandedIndexes and save their DataKeys
on ItemDataBound set item.Expanded to true/false

But when I set item.Expanded to false, it is set up back to true.

I must remove its from ExpandedIndexes manually, using Page_PreRender...

Why

item.Expanded = false

doesn't do that?

LoadOnDemand Enabled and Expanded Indexes

6 Answers, 1 is accepted