The answer depends on what do you mean by expand/collapse column. If you meant hierarchical structure the could be expanded and collapsed, yes, RadGrid has such functionality as demonstrated in this
online demo application.
If you have in mind the collapsible header of the PivotGrid then I am afraid there is no such functionality in RadGrid.
If RadGrid satisfies your requirement you could use it and get the none sort order. If not, I am afraid that the PivotGrid could not display unsorted data.
the Telerik team
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