In general RadGridView
will not automatically expand all of your sub-hierarchies. For a more practical example I attached an updated version of the project from the Three level hierarchy support
A possible way to automatically expand / collapse all of the sub-hierarchies is to invoked the ExpandAllHierarchyItems()
methods somewhere in your code or have some other customization. In order to determine what exactly is causing this behavior, could you please provide us with code-snippets of all definitions both in XAML and code-behind connected to RadGridView
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