DevExpress XtraGrid 에서 선택된 행 유지

using DevExpress.XtraGrid;
using DevExpress.XtraGrid.Views.Grid;
...
object SaveFocusedRow = null;




private void gridView_StartSorting(object sender, System.EventArgs e) {
    GridView view = sender as GridView;
    SaveFocusedRow = view.GetRow(view.FocusedRowHandle);
}

private void gridView_EndSorting(object sender, System.EventArgs e) {
    GridView view = sender as GridView;
    int rowHandle = FindRowHandleByRowObject(view, SaveFocusedRow);
    if(rowHandle != GridControl.InvalidRowHandle) {
        view.FocusedRowHandle = rowHandle;
        SaveFocusedRow = null;
    }
}

private int FindRowHandleByRowObject(DevExpress.XtraGrid.Views.Grid.GridView view, object row) {
    if(row != null)
        for(int i = 0 ; i < view.DataRowCount ; i++)
            if(row.Equals(view.GetRow(i)))
                return i;
    return DevExpress.XtraGrid.GridControl.InvalidRowHandle;
}

private int FindRowHandleByDataRow(DevExpress.XtraGrid.Views.Grid.GridView view, DataRow row) {
    if(row != null)
        for(int i = 0 ; i < view.DataRowCount ; i++)
            if(view.GetDataRow(i) == row)
                return i;
    return DevExpress.XtraGrid.GridControl.InvalidRowHandle;
}