my dropdrown is not loaded in the data is already datatable

Question

if (cmb_supply.Text != null)

{

try

{

List<SqlParameter> prm = new List<SqlParameter>();

DataSet ds = sp.GetDS("sp_GetSupplier", prm);

DataTable dt = ds.Tables[0];

for (int i = 0; i <= dt.Rows.Count - 1; i++)

{

cmb_supply.DisplayMember = "Name";

cmb_supply.ValueMember = "SupplierId";

}

}

catch (Exception ex)

{

throw ex;

}