I have a tree that is linked to a list of custom objects (myBase). Each one of these custom objecs has a list of a different custom objects (myChildren). The myBase list conains about 100 objects. Each myBase object contains about 100 myChildren object. It takes about 30 seconds to load myChildren list for any myBase object. I don't want to spend 100*30 = 3,000 seconds (50 minutes!) to load the full tree from the begining. What i do is everytime the user expands the myBase node i read in the list of myChildren (in the BeforeExpand Event).
Here is the issue 50% of the time when i load the myChildren list it shows up correctly, the other 50% of the time the myCHildren list gets populated but is not reflected in the Tree. I've tried this with the same data, 50% it works and 50% it doesn't work.
I've tried calling Tree.Refresh,and Tree.DataSource = List(myBase) but it doesn't help.
Is there a way to fix this?
It is impossible to speculate about something like this without additional details. You should be able to put a breakpoint in the BeforeExpand handler and step through the code to determine the reason why the data exists but nodes are not created as expected. If you can't figure it out you might want to report the issue via the web support form so you can provide a test project that demonstrates the problem.