show/hide particular column in UltraWebGrid (Infragistics)

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ASP.NET

I am using UltraWebGrid and need particular columns to Show/Hide.

My requirement is:
I have more then One user,who select the columns which are shown in Grid
Each User Select Column that he want to see.
he select the columns and Saved it.

I want to save the Columns List against user. Which approach is best.

1. Save The Columns List into MsSQL Server DB
2. Save in XML File.

or any Alternate Way which is Better.

Q. Can I show/Hide columns in DataTable as per userRequest. if yes then How?


Regards,
Saad