Protected Sub gvUser_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles gvManaging.RowCommand
  Dim ID_User As String

  If e.CommandName = "Show" Then
    If Page.IsPostBack Then
      ID_User = gvUser.DataKeys.Item(0).Value
      '
      ' Cosa devo scrivere qui?
      '
    End If
  End If

End Sub