Hello Shafaq Kazmi,

Thank you for posting in our forums!

Thank you for the fiddle.  In order to have the column sorted, you will need to let the grid know to sort the columns.  You can do this by calling the sortColumn method after calling updateRow.  The following code is an example of how to achieve this in your sample:

var item = $scope.dataSource[4].files[0].files[0];
  var oldName = item.name;
  item.name = "Updated Row";
  $("#igniteGridId").igTreeGridUpdating("updateRow", oldName, item);
  $("#igniteGridId").igTreeGridSorting("sortColumn", 0, "ascending");
}

I have modified your jsFiddle and updated it here.  If you need further assistance with this, please let me know and I will be glad to help.

If I turned it on, above issues come but when it's off its working fine. Here is the updated fiddle.

Thank you.