模糊查询+分页

 /// <summary>

        /// 查询员工

        /// </summary>

        /// <param name="queryString">待查询的字符串</param>

        /// <returns></returns>

        public static IList<Xlzt.DataAccessLayer.Member> QueryMember(out int totleCount, int pageNum, int pageSize,String queryString)

        {

            try

            {

                using (Xlzt.DataAccessLayer.CRM_DBEntity db = new CRM_DBEntity())

                {

                    //按员工姓名，工号，部门三个字段模糊查询

                    var result = db.Members.OrderBy(c=>c.account).Where(obj => obj.name.StartsWith(queryString) || obj.name.EndsWith(queryString) || obj.name.IndexOf(queryString) != -1

                       || obj.account.StartsWith(queryString) || obj.account.EndsWith(queryString) || obj.account.IndexOf(queryString) != -1

                         || obj.department.StartsWith(queryString) || obj.department.EndsWith(queryString) || obj.department.IndexOf(queryString) != -1

                        );

                    //获取总记录数目

                    totleCount = result.ToArray().Length;

                    //获取请求页的最大索引

                    int max = (result.ToArray().Length <= pageNum * pageSize) ? result.ToArray().Length : pageNum * pageSize;

                    if (max < (pageNum - 1) * pageSize)

                    {

                        //请求页的最大索引比它上一页的最大索引还小：矛盾

                        return null;

                    }

                    else if (max < pageSize * pageNum)

                    {

                        //请求页是左后一页

                        return result.Skip((pageNum - 1) * pageSize).ToList();//使用Skip时要使用OrderBy

                    }

                    else

                    {

                        //请求页正常返回

                        return result.Skip((pageNum - 1) * pageSize).Take(pageSize).ToList();

                    }

                   

                }

            }

            catch (Exception)

            {

                totleCount = 0;

                return null;

            }



        }