how to show hidden column when you click the built in export images?

[Amy Liu]

Hello!
A simple question: I used the image in the grid to export to excel, pdf and word.I want to show hidden column after the grid exported.
How can I put the code in the image click event?

 I know we can put display=true in in the clieck event if there is a button there.
I used GridExporting event and put the display=true code inside. It seem to me that it doesn't work.
 Is it a click event also ? What is the name of the event?

Thanks for any help!

Amy
I used the code. It is working. No help is needed.  Amy

  protected void rg_ItemCommand(object sender, GridCommandEventArgs e)
  {
      if (e.CommandName == RadGrid.ExportToExcelCommandName)
      {
          rg.MasterTableView.GetColumn("x").Visible = false;
          rg.MasterTableView.GetColumn("y").Visible = true;              }
}