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Can you please verify that your data source has the appropriate structure for treelist-type visualization? You can check the binding of the second control RadTreeList2
for a reference in the following live sample:
I'm also sending a random web site sample to demonstrate a basic LoadOnDemand binding:
If the issue remains, please create a very basic runnable
web site demonstrating the problematic behavior and send it to us. Thus, we will be able to further debug and analyze the project and try to determine the cause of the problem.
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