protected void ddlstate_SelectedIndexChanged(object sender, EventArgs e) { if (ddlstate.SelectedIndex > 0) { MasterData objmst = new MasterData(); DataTable dt = new DataTable(); dt = objmst.Getcountry_frmstate(Convert.ToInt32(ddlstate.SelectedItem.Value)); ddlcountry.SelectedIndex = ddlcountry.Items.IndexOf(ddlcountry.Items.FindByValue(dt.Rows[0]["Country_ID"].ToString())); } else { ddlcountry.ClearSelection(); } }