DataGridView cell content tooltip?

protected void myGridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        for (int i = 0; i < e.Row.Cells.Count; i++)
        {
            if (e.Row.Cells[i].Controls.Count == 0)
            {
                e.Row.Cells[i].ToolTip = e.Row.Cells[i].Text;
            }
            else
            {
                e.Row.Cells[i].ToolTip = GetObjectType(e.Row.Cells[i].Controls[1]);
            }
        }
    }
}

private String GetObjectType(Control ctrl)
{
    switch (ctrl.GetType().Name)
    {
        case "Label":
            return ((Label)ctrl).Text;
        case "TextBox":
            return ((TextBox)ctrl).Text;
    }
    return "";
}