private DataTable dtAccountCheckIn() { DataTable dtReturn = new DataTable(); DataTable dt = new Chatting().SelectUserCheckIn(); dtReturn = dt.Clone(); foreach (DataRow dr in dt.Rows) { string vung_line = dr["Line_Vung"].ToString(); if (vung_line.Contains(";")) { string[] arrVung_Line = vung_line.Split(';'); if (arrVung_Line.Length > 0) { for (int i = 0; i < arrVung_Line.Length; i++) { dr["Line_Vung"] = arrVung_Line[i]; dtReturn.Rows.Add(dr.ItemArray); } } } else { dtReturn.Rows.Add(dr.ItemArray); } } return(dtReturn); }