How to sort the entire gridview rows by the datetime column?

• There's a gridview on my asp page and sqldatasource to bind the data
  table info to gridview.


• I have 6 columns:


• First column is called ID : type : int, increment by one , primary
  key.


• The other columns are name,age etc..


• The last column is called Added : type : datetime .

I need to add a button or dropdownlist doesn't matter where I can sort the entire gridview rows by the DateTime Column.

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