how to create aocolumns array dynamic in asp.net C# web form?

hvm

I want to show column dynamic as per selection.
"aoColumns": [
//Assign the data to rows
{"mDataProp": "ID" },
{ "mDataProp": "Name" },
{ "mDataProp": "Address" },
{ "mDataProp": "Town" },
{ "mDataProp": "Country" },
{ "mDataProp": "Email" },
{ "mDataProp": "Gender" },
{ "mDataProp": "Phone" }
how to create aocolumns array dynamic in asp.net C# web form?

Client requirement is, he select column and order based on that column display.

its very urgent.
thanks in advance...