Thank you for writing.
We have introduced the sorting feature back in Q1 2012 SP1. Here is how you can set the sort order:
radGridView1.ColumnChooser.SortOrder = RadSortOrder.Ascending;
sender, ColumnChooserCreatedEventArgs e)
e.ColumnChooser.SortOrder = RadSortOrder.Ascending;
Using the ColumnChooserEvent is important, as the column chooser instance is recreated on demand. This ensures that you will always work with valid instance of it.
I hope this helps.
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