Two dropdowns with changing value from one - asp.net

 at page load

{

LoadCourtsByCourtTypeId(0);

}

protected void ddlTypeOfCourt_SelectedIndexChanged(object sender, EventArgs e)

        {

            LoadCourtsByCourtTypeId(long.Parse(ddlTypeOfCourt.SelectedValue));

        }

            

            if (courtApplicationDatesDTO != null && courtApplicationDatesDTO.DatesId > 0)

            {

            LoadCourtsByCourtTypeId(long.Parse(ddlTypeOfCourt.SelectedItem.Value));

                ddlNameOfCourt.SelectedValue = courtApplicationDatesDTO.CourtId.ToString();

            }