C#查询数据库的两种方式

        //分页获取停车记录
        public ParkEventSearchResultForWebDTO GetParkLogListFromDB(ParkEventSearchConditionDTO sc) { try { ParkEventSearchResultForWebDTO returnObj = new ParkEventSearchResultForWebDTO(); returnObj.list = new List<ParkLogDTO>(); string whereStr = ""; if (ConvertDataTimeToLong(sc.enterStartTime) > 0) { if (whereStr != "") whereStr += " and"; whereStr = whereStr + string.Format(" x.EnterTime > '{0}' ", sc.enterStartTime.ToString("yyyy-MM-dd HH:mm:ss")); } if (ConvertDataTimeToLong(sc.enterEndTime) > 0) { if (whereStr != "") whereStr += " and"; whereStr = whereStr + string.Format(" x.EnterTime < '{0}' ", sc.enterEndTime.ToString("yyyy-MM-dd HH:mm:ss")); } if (ConvertDataTimeToLong(sc.leaveStartTime) > 0) { if (whereStr != "") whereStr += " and"; whereStr = whereStr + string.Format(" x.LeaveTime > '{0}' ", sc.leaveStartTime.ToString("yyyy-MM-dd HH:mm:ss")); } if (ConvertDataTimeToLong(sc.leaveEndTime) > 0) { if (whereStr != "") whereStr += " and"; whereStr = whereStr + string.Format(" x.LeaveTime < '{0}' ", sc.leaveEndTime.ToString("yyyy-MM-dd HH:mm:ss")); } if (!string.IsNullOrEmpty(sc.license)) { if (whereStr != "") whereStr += " and"; whereStr = whereStr + string.Format(" x.CarNumber = '{0}' ", sc.license); } if (sc.enterDevId != null) { if (whereStr != "") whereStr += " and"; whereStr = whereStr + string.Format(" x.EnterDevid = '{0}' ", sc.enterDevId); } if (!string.IsNullOrEmpty(sc.cardCode)) { if (whereStr != "") whereStr += " and"; whereStr = whereStr + string.Format(" x.CardCode = '{0}' ", sc.cardCode); } if (sc.leaveDevId != null) { if (whereStr != "") whereStr += " and"; whereStr = whereStr + string.Format(" x.LeaveDevid = '{0}' ", sc.leaveDevId); } String orderStr = " order by x.EnterTime desc"; String hql = "select x from ParkLog x " + (whereStr != "" ? ("where" + whereStr) : "") + orderStr; ; IQuery query = ParkLogDao.GetSession().CreateQuery(hql); List<ParkLog> tempList = query.List<ParkLog>().ToList(); returnObj.total = tempList.Count(); if (sc.pageSize == 0) sc.pageSize = 20; if (sc.pageNum == 0) sc.pageNum = 1; if (returnObj.total % sc.pageSize == 0) { returnObj.pages = returnObj.total / sc.pageSize; } else { returnObj.pages = returnObj.total / sc.pageSize + 1; } int start = (sc.pageNum - 1) * sc.pageSize; int cnt = sc.pageSize; if (start >= returnObj.total) return null; if ((start + sc.pageSize > returnObj.total)) { cnt = returnObj.total - sc.pageSize * (sc.pageNum - 1); } tempList = tempList.GetRange(start, cnt); foreach (var item in tempList) { returnObj.list.Add(DTOTransfer.ToDTO(item)); } returnObj.pageSize = sc.pageSize; returnObj.pageNum = sc.pageNum; return returnObj; } catch (Exception ex) { LogHelper.GetLog("Server").Error(ExceptionHelper.GetExceptionDesc(ex)); throw; } }

        public List<SysUserDTO> GetUserList(UserSearchConditionDTO cond) { try { List<SysUser> userLst = null; if (cond != null) { userLst = _userList.FindAll(item => (cond.userName == null || item.UserName.Contains(cond.userName)) && (cond.LoginName == null || item.LoginName.Contains(cond.LoginName)) && (cond.departmentId == null || item.DeptId == (int)cond.departmentId)); } else { userLst = _userList;//.FindAll(item => item.DelFlag == null || item.DelFlag == false);
 } if (userLst != null && userLst.Count() > 0) { List<SysUserDTO> returnValue = new List<SysUserDTO>(); foreach (var us in userLst) { var usDto = DTOTransfer.ToDTO(us); SysDepartment sysDep = _deptList.Find(item => item.DeptId == usDto.SysDepartment.DeptId); if (null != sysDep) { //usDto.SysDepartment.DeptName = sysDep.DeptName;
                            usDto.SysDepartment = DTOTransfer.ToDTO(sysDep); } SysUserRole sysUserRole = _userRoleList.Find(item => item.Urid == usDto.UserId); if (null != sysUserRole) { usDto.SysRole = DTOTransfer.ToDTO(_roleList.Find(item => item.RoleId == sysUserRole.RoleId)); } returnValue.Add(usDto); } //var userDTOList = userLst.Select(item => DTOTransfer.ToDTO(item)).ToList();
                    return returnValue; } else
                    return null; List<SysUserDTO> listSysUser = new List<SysUserDTO>(); #region 登录用户不为空的处理
                if (!String.IsNullOrEmpty(cond.LoginName)) { SysUser sysUserObj = _userList.Find(item => item.LoginName == cond.LoginName); //SysUser sysUserObj = SysUserDao.GetAll(item => item.LoginName == cond.LoginName && (item.DelFlag == null || item.DelFlag == false)).First();
                    if (null == sysUserObj) return null; if (cond.roleId > 0) {// 指定查找用户角色
                        List<SysUserRole> userList = SysUserRoleDao.GetAll(item => item.RoleId == cond.roleId); var userRole = _userRoleList.Find(item => item.RoleId == cond.roleId); if (userRole == null) return null; int flag = 0; foreach (var userListObj in userList) { if (userListObj.UserId == sysUserObj.UserId) { flag = 1; break; } } if (0 == flag) return null; } if (null != cond.onlineState) { if (cond.onlineState != sysUserObj.IsLogin) return null; } if (!String.IsNullOrEmpty(cond.userName)) { if (!sysUserObj.UserName.Contains(cond.userName)) return null; } SysUserDTO sysUserDto = DTOTransfer.ToDTO(sysUserObj); listSysUser.Add(sysUserDto); } #endregion
                #region 登录用户为空的处理
                else { if (cond.roleId > 0) { List<SysUserRole> userList = SysUserRoleDao.GetAll(item => item.RoleId == cond.roleId); if (0 == userList.Count()) return null; foreach (var userListObj in userList) { SysUser sysUserObj = _userList.Find(item => item.UserId == userListObj.UserId); //SysUser sysUserObj = SysUserDao.Get(userListObj.UserId);
                            if (null == sysUserObj) continue; //if (sysUserObj.DelFlag == true) // continue;

                            if (!String.IsNullOrEmpty(cond.userName) && !(sysUserObj.UserName.Contains(cond.userName))) continue; if (null == cond.onlineState) { SysUserDTO sysUserDto = DTOTransfer.ToDTO(sysUserObj); listSysUser.Add(sysUserDto); } else if (null != cond.onlineState && sysUserObj.IsLogin == cond.onlineState) { SysUserDTO sysUserDto = DTOTransfer.ToDTO(sysUserObj); listSysUser.Add(sysUserDto); } } } else { //var userList = SysUserDao.GetAll();
                        foreach (var userListObj in _userList) { if (!String.IsNullOrEmpty(cond.userName) && !(userListObj.UserName.Contains(cond.userName))) continue; if (null == cond.onlineState) { SysUserDTO sysUserDto = DTOTransfer.ToDTO(userListObj); listSysUser.Add(sysUserDto); } else if (null != cond.onlineState && userListObj.IsLogin == cond.onlineState) { SysUserDTO sysUserDto = DTOTransfer.ToDTO(userListObj); listSysUser.Add(sysUserDto); } } } } #endregion

                return listSysUser; } catch (Exception ex) { Console.WriteLine(ExceptionHelper.GetExceptionDesc(ex)); throw ex; } }