C# eSortColumn类代码示例

        private static EventComment[] Fetch(int? id, int? eventID, string username, int? numberOfComments, eSortColumn sortColumn)
        {
            using (var db = new ezFixUpDataContext())
            {
                var comments = from c in db.EventComments
                               where (!id.HasValue || c.ec_id == id)
                                     && (!eventID.HasValue || eventID == c.e_id)
                                     && (username == null || username == c.u_username)
                               select new EventComment
                                          {
                                              id = c.ec_id,
                                              eventID = c.e_id,
                                              username = c.u_username,
                                              comment = c.ec_comment,
                                              date = c.ec_date
                                          };
                
                if (sortColumn == eSortColumn.Date)
                {
                    comments = comments.OrderByDescending(c => c.date);
                }
                else if (sortColumn == eSortColumn.Username)
                {
                    comments = comments.OrderBy(c => c.username);
                }
                else if (sortColumn == eSortColumn.EventID)
                {
                    comments = comments.OrderBy(c => c.eventID);
                }

                if (numberOfComments.HasValue)
                {
                    comments = comments.Take(numberOfComments.Value);
                }
                
                return comments.ToArray();
            }
        }

        private static AdsCategory[] Fetch(int? id, int? parentID, string title, eSortColumn sortColumn)
        {
            using (SqlConnection conn = Config.DB.Open())
            {
                SqlDataReader reader = SqlHelper.ExecuteReader(conn, "FetchAdsCategories", id, parentID, title, sortColumn);

                List<AdsCategory> categories = new List<AdsCategory>();

                while (reader.Read())
                {
                    AdsCategory category = new AdsCategory();

                    category.id = (int)reader["ID"];
                    category.parentID = reader["ParentID"] != DBNull.Value ? (int?) reader["ParentID"] : null;
                    category.title = (string)reader["Title"];

                    categories.Add(category);
                }

                return categories.ToArray();
            }
        }

 /// <summary>
 /// Fetches the by affiliate ID.
 /// </summary>
 /// <param name="affiliateID">The affiliate ID.</param>
 /// <param name="sortColumn">The sort column.</param>
 /// <returns></returns>
 public static AffiliateHistory[] FetchByAffiliateID(int affiliateID, eSortColumn sortColumn)
 {
     return Fetch(null, affiliateID, null, null, sortColumn);
 }

        /// <summary>
        /// Fetches all content pages from database by specified id or language.
        /// </summary>
        /// <param name="id">Represents content page id.</param>
        /// <param name="languageID">The language ID.</param>
        /// <param name="sortColumn">The sort column.</param>
        /// <returns>Array of content pages.</returns>
        public static ContentPage[] FetchContentPages(object id, object languageID, eSortColumn sortColumn)
        {
            string cacheKey = String.Format("ContentPage_FetchContentPages_{0}_{1}_{2}", id, languageID, sortColumn);
            if (HttpContext.Current != null && HttpContext.Current.Cache[cacheKey] != null)
            {
                return HttpContext.Current.Cache[cacheKey] as ContentPage[];
            }

            var lPages = new List<ContentPage>(5);

            using (SqlConnection conn = Config.DB.Open())
            {
                SqlDataReader reader =
                    SqlHelper.ExecuteReader(conn,
                                            "FetchContentPages", id, languageID, sortColumn);

                while (reader.Read())
                {
                    var contentPage = new ContentPage();
                    contentPage.id = (int) reader["ID"];
                    contentPage.title = (string) reader["Title"];
                    contentPage.linkText = (string)reader["LinkText"];
                    contentPage.content = (string) reader["Content"];
                    contentPage.headerPosition = reader["HeaderPosition"] == DBNull.Value
                                                     ? null
                                                     : (int?) reader["HeaderPosition"];
                    contentPage.footerPosition = reader["FooterPosition"] == DBNull.Value
                                                     ? null
                                                     : (int?) reader["FooterPosition"];
                    contentPage.visibleFor = (eVisibility) (int) reader["VisibleFor"];
                    contentPage.url = reader["URL"] == DBNull.Value ? null : (string) reader["URL"];
                    contentPage.metaDescription = (string) reader["MetaDescription"];
                    contentPage.metaKeyword = (string) reader["MetaKeyword"];
                    contentPage.languageID = (int) reader["LanguageID"];
                    contentPage.urlRewrite = reader["UrlRewrite"] as string;

                    lPages.Add(contentPage);
                }
            }

            ContentPage[] pages = lPages.ToArray();
            if (HttpContext.Current != null)
            {
                HttpContext.Current.Cache.Insert(cacheKey, pages, null, DateTime.Now.AddMinutes(30),
                                                 Cache.NoSlidingExpiration, CacheItemPriority.NotRemovable, null);
            }

            return pages;
        }

        /// <summary>
        /// Fetches credits packages by specified arguments.
        /// It returns an empty array if there are no credits packages in DB by specified arguments.
        /// If these arguments are null it returns all credits packages from DB.
        /// </summary>
        /// <param name="id">The id.</param>
        /// <param name="name">The name.</param>
        /// <param name="quantity">The quantity.</param>
        /// <param name="price">The price.</param>
        /// <param name="sortColumn">The sort column.</param>
        /// <returns></returns>
        private static CreditsPackage[] Fetch(int? id, string name, int? quantity, decimal? price, eSortColumn sortColumn)
        {
            using (SqlConnection conn = Config.DB.Open())
            {
                SqlDataReader reader = (SqlDataReader)
                    SqlHelper.GetDB().ExecuteReader( "FetchCreditsPackages", id, name, quantity, price, sortColumn);

                List <CreditsPackage> lCreditsPackage = new List<CreditsPackage>();

                while (reader.Read())
                {
                    CreditsPackage creditsPackage = new CreditsPackage();

                    creditsPackage.id = (int) reader["ID"];
                    creditsPackage.name = (string) reader["Name"];
                    creditsPackage.quantity = (int) reader["Quantity"];
                    creditsPackage.price = (decimal) reader["Price"];

                    lCreditsPackage.Add(creditsPackage);
                }

                return lCreditsPackage.ToArray();
            }
        }

        /// <summary>
        /// Fetches group members from DB by specified group ID, username, type or active status.
        /// If all arguments are null it returns all group members from DB.
        /// If it cannot find a record in DB by specified arguments it returns an empty array.
        /// </summary>
        /// <param name="groupID">The group ID.</param>
        /// <param name="username">The username.</param>
        /// <param name="type">The type.</param>
        /// <param name="active">The active.</param>
        /// <param name="joinDate">The join date.</param>
        /// <param name="invitedBy">The invited by.</param>
        /// <param name="numberOfMembers">The number of members.</param>
        /// <returns>Group members array or an empty array if no group members are found in DB.</returns>
        private static GroupMember[] Fetch(int? groupID, string username, eType? type, bool? active,
                                                DateTime? joinDate, string invitedBy,
                                                int? numberOfMembers, eSortColumn sortColumn)
        {
            using (SqlConnection conn = Config.DB.Open())
            {
                SqlDataReader reader = (SqlDataReader) SqlHelper.GetDB().ExecuteReader( "FetchGroupMembers",
                                                                groupID, username, type, active, joinDate, invitedBy, numberOfMembers, sortColumn);

                List<GroupMember> groupMembers = new List<GroupMember>();

                while (reader.Read())
                {
                    GroupMember groupMember = new GroupMember();

                    groupMember.groupID = (int) reader["GroupID"];
                    groupMember.username = (string) reader["Username"];
                    groupMember.type = (eType) reader["Type"];
                    groupMember.active = (bool) reader["Active"];
                    groupMember.joinDate = (DateTime) reader["JoinDate"];
                    groupMember.invitedBy = reader["InvitedBy"] != DBNull.Value
                                                                    ? (string) reader["InvitedBy"] : null;
                    groupMember.joinAnswer = (string) reader["JoinAnswer"];
                    groupMember.isWarned = (bool) reader["IsWarned"];
                    groupMember.warnReason = reader["WarnReason"] != DBNull.Value ? (string) reader["WarnReason"] : null;
                    groupMember.warnExpirationDate = reader["WarnExpirationDate"] != DBNull.Value
                                                         ? (DateTime?) reader["WarnExpirationDate"]
                                                         : null;

                    groupMembers.Add(groupMember);
                }

                return groupMembers.ToArray();
            }
        }

 public static GiftCategory[] FetchCategories(eSortColumn sortColumn)
 {
     GiftCategory[] categories = Fetch(sortColumn);
     return categories.Where(category => category._parentID == null /*&& category.IsActive*/)
                      .Select(category => category).ToArray();
 }

        private static WinkCategory[] Fetch(int? id, int? parentID, string title, eSortColumn sortColumn)
        {
            //using (var conn = Config.DB.Open())
            {
                var categories = new List<WinkCategory>();

                using (var reader = SqlHelper.GetDB().ExecuteReader(FetchProcedureName,
                                                                    id, parentID, title, sortColumn))
                {
                    while (reader.Read())
                    {
                        var category = new WinkCategory
                            {
                                _id = (int) reader["ID"],
                                _parentID = (int?) reader["LanguageID"],
                                _title = (string) reader["Title"]
                            };
                        categories.Add(category);
                    }
                    reader.Close();
                }
                return categories.ToArray();
            }
        }

        private static BannerCode[] Fetch(int? id, ePosition? position, bool? getDefault, eSortColumn sortColumn)
        {
            string cacheKey = String.Format("BannerCode_Fetch_{0}_{1}_{2}_{3}", id, position, getDefault, sortColumn);

            if (HttpContext.Current != null && HttpContext.Current.Cache[cacheKey] != null)
            {
                return HttpContext.Current.Cache[cacheKey] as BannerCode[];
            }

            using (var db = new Model.AspNetDatingDataContext())
            {
                var bannerCodes = from bc in db.BannerCodes
                                  where (!id.HasValue || bc.bc_id == id)
                                        && (!position.HasValue || bc.bc_position == (int?) position)
                                        && (!getDefault.HasValue || bc.bc_target == null)
                                  select new BannerCode
                                             {
                                                 id = bc.bc_id,
                                                 position = (ePosition) bc.bc_position,
                                                 priority = bc.bc_priority,
                                                 target = bc.bc_target,
                                                 code = bc.bc_code
                                             };
                switch (sortColumn)
                {
                    case eSortColumn.None :
                        break;
                    case eSortColumn.Priority :
                        bannerCodes = bannerCodes.OrderByDescending(bc => bc.priority);
                        break;
                }

                if (HttpContext.Current != null)
                {
                    HttpContext.Current.Cache.Insert(cacheKey, bannerCodes.ToArray(), CacheDependencies.Get(), DateTime.Now.AddMinutes(30),
                        Cache.NoSlidingExpiration);
                }

                return bannerCodes.ToArray();
            }
        }

 public static EventComment[] Fetch(int eventID, eSortColumn sortColumn)
 {
     return Fetch(null, eventID, null, null, sortColumn);
 }

        /// <summary>
        /// Fetches group event comments by specified arguments.
        /// It returns an empty array if there are no group event comments in DB by specified arguments.
        /// If these arguments are null it returns all group event comments from DB.
        /// </summary>
        /// <param name="id">The id.</param>
        /// <param name="groupEventID">The group event ID.</param>
        /// <param name="username">The username.</param>
        /// <param name="sortColumn">The sort column.</param>
        /// <returns></returns>
        private static GroupEventsComment[] Fetch(int? id, int? groupEventID, string username, eSortColumn sortColumn)
        {
            using (SqlConnection conn = Config.DB.Open())
            {
                SqlDataReader reader =
                    SqlHelper.ExecuteReader(conn, "FetchGroupEventsComments", id, groupEventID, username, sortColumn);

                List <GroupEventsComment> lGroupEventsComments = new List<GroupEventsComment>();

                while(reader.Read())
                {
                    GroupEventsComment groupEventsComment = new GroupEventsComment();

                    groupEventsComment.id = (int) reader["ID"];
                    groupEventsComment.groupEventID = (int) reader["GroupEventID"];
                    groupEventsComment.username = (string) reader["Username"];
                    groupEventsComment.comment = (string) reader["Comment"];
                    groupEventsComment.date = (DateTime) reader["Date"];

                    lGroupEventsComments.Add(groupEventsComment);
                }

                return lGroupEventsComments.ToArray();
            }
        }

 /// <summary>
 /// Fetches group event comments by specified group event id.
 /// If there are no group event comments in DB for the specified group event id it returns an empty array.
 /// </summary>
 /// <param name="groupEventID">The group event ID.</param>
 /// <param name="sortColumn">The sort column.</param>
 /// <returns></returns>
 public static GroupEventsComment[] FetchByGroupEventID(int groupEventID, eSortColumn sortColumn)
 {
     return Fetch(null, groupEventID, null, sortColumn);
 }

        public static AdsCategory[] FetchCategories(eSortColumn sortColumn)
        {
            List<AdsCategory> lAdsCategories = new List<AdsCategory>();
            AdsCategory[] categories = Fetch(sortColumn);

            foreach (var category in categories)
            {
                if (category.parentID != null) continue;
                lAdsCategories.Add(category);
            }

            return lAdsCategories.ToArray();
        }

 public static WinkCategory[] FetchCategoriesByLaguageId(int languageId, eSortColumn sortColumn)
 {
     WinkCategory[] categories = Fetch(sortColumn);
     return categories.Where(category => category._parentID == languageId)
                      .Select(category => category).ToArray();
 }

 public static GiftCategory[] Fetch(eSortColumn sortColumn)
 {
     return Fetch(null, null, null, sortColumn);
 }