public string CycleCountry(string system_id, string selected_year) { clsDataHandling objDataClass = new clsDataHandling(); DataTable dt = objDataClass.CycleCountry(system_id, selected_year); StringBuilder str = new StringBuilder(); str.Append("["); str.Append("{"); str.Append("\"code\":\"0\" ,"); str.Append("\"name\":\"--Select--\""); str.Append("},"); for (int i = 0; i < dt.Rows.Count; i++) { str.Append("{"); str.Append("\"code\":\"" + dt.Rows[i]["ISO"].ToString() + "\" ,"); str.Append("\"name\":\"" + dt.Rows[i]["COUNTRY"].ToString() + "\" "); str.Append("},"); } str = str.Remove(str.Length - 1, 1); str.Append("]"); return(str.ToString()); }