public Pager <MessageInfo> GetMessagePagerList(int pageIndex = 0, int pageSize = 0, int isValid = -1) { int dataCount = messageServer.GetMessageInfoList(isValid: isValid).Count; List <MessageInfo> InfoList = messageServer.GetMessageInfoList(true, pageIndex, pageSize, isValid); Pager <MessageInfo> pager = new Pager <MessageInfo>(pageIndex, pageSize, dataCount, InfoList); return(pager); }