public void Load_cbo_TenNPP() { string strsel = "select * from NhaPhanPhoi"; DataTable dt = conn.getDataTable(strsel, "NhaPhanPhoi"); cbo_TenNPP.DataSource = dt; cbo_TenNPP.DisplayMember = "TenNPP"; cbo_TenNPP.ValueMember = "MaNPP"; }