AutoExpandAllGroups not auto expanding all groups at a DevExpress ASPxGridView?

Per this, this...

<SettingsBehavior AutoExpandAllGroups="True"></SettingsBehavior>

 
 

...is not going to do its thing for data bound in a callback in lieu of a postback or a page load. The cure is to move the act to the C# side like so:

myGrid.ExpandAll();