www.pudn.com > MyShop.rar > Announce.cs

using System; 
using System.Collections.Generic; 
 
using System.Data; 
 
 
using MyShop.DALFactory; 
using MyShop.IDAL; 
using MyShop.Model; 
 
namespace MyShop.BLL 
{ 
    public class Announce 
    { 
        private IAnnounce dal = DataAccess.CreateAnnounce(); 
 
        public Announce() { } 
 
        #region IAnnounce 
 
        public int Add(AnnounceInfo model) 
        { 
            if (model == null) 
            { 
                return 0; 
            } 
            return dal.Add(model); 
        } 
 
        public int Delete(string filter) 
        { 
            if (string.IsNullOrEmpty(filter)) 
                return 0; 
            return dal.Delete(filter); 
        } 
 
        public bool Exist(string filter) 
        { 
            filter = filter.Trim(); 
            if (string.IsNullOrEmpty(filter)) 
                return false; 
            return dal.Exist(filter); 
        } 
        public DataSet GetDataSet() 
        { 
            return dal.GetDataSet(); 
        } 
 
        public DataSet GetDataSet(string filter) 
        { 
            filter = filter.Trim(); 
            if (string.IsNullOrEmpty(filter)) 
                return null; 
            return dal.GetDataSet(filter); 
        } 
 
        public AnnounceInfo GetModel(DataRow dr) 
        { 
            if (dr == null) 
                return null; 
            return dal.GetModel(dr); 
        } 
 
        private DataSet Query(string sql) 
        { 
            sql = sql.Trim(); 
            if (string.IsNullOrEmpty(sql)) 
                return null; 
            return dal.Query(sql); 
        } 
 
        public int Update(AnnounceInfo model, string filter) 
        { 
            if (model == null) 
                return 0; 
            filter = filter.Trim(); 
            if (string.IsNullOrEmpty(filter)) 
                return 0; 
            return dal.Update(model, filter); 
        } 
 
        #endregion 
 
        #region common 
 
        public int Add(AnnounceInfo model, out string msg) 
        { 
            msg = ""; 
            if (model == null) 
            { 
                msg = msg + "
数据不能为空
"; 
                return 0; 
            } 
             
            bool isErr = false; 
 
            if (string.IsNullOrEmpty(model.Title.Trim())) 
            { 
                msg = msg + "请输入标题"; 
                isErr = true; 
            } 
 
            if (isErr) 
                return 0; 
 
            int count = 0; 
            count = Add(model); 
            if (count == 0) 
                msg = "
系统发生错误,请重新添加!
"; 
            if (count == 1) 
                msg = "
添加成功!
"; 
            return count; 
        } 
 
        public int Delete(int Id) 
        { 
            if (string.IsNullOrEmpty(Id.ToString())) 
                return 0; 
            string filer; 
            filer = " Id =" + Id; 
            return Delete(filer); 
        } 
        public int Update(AnnounceInfo model) 
        { 
 
            if (model == null) 
            { 
                return 0; 
            } 
            string filter; 
            filter = "Id=" + model.Id; 
            return Update(model, filter); 
        } 
 
        public AnnounceInfo GetModel(int  Id) 
        { 
            DataSet dataset = new DataSet(); 
            dataset = GetDataSet(" Id=" + Id); 
            if (dataset.Tables[0].Rows.Count > 0) 
                return GetModel(dataset.Tables[0].Rows[0]); 
            return null; 
 
        } 
 
        #endregion 
 
 
        /// 
 
        /// 首页公告 
        /// 
 
        public DataSet GetSelectedAnnounce() 
        { 
            string filter; 
            filter = " isSelected=1 "; 
            return GetDataSet(filter); 
        } 
 
        /// 
 
        /// 得到在有有效时间内的公告列表 
        /// 
 
        ///  
        public DataSet GetList() 
        { 
            return dal.GetList(); 
        } 
 
 
        #region 后台管理 
 
        public DataSet GetDataSetOrderById() 
        { 
            return GetDataSet(" [Id] > 0 Order by  [Id]  "); 
        } 
 
 
        /// 
 
        /// 把为Id的记录改为最新公告,同时将其它记录改为不是最新公告 
        /// 
 
        ///  
        ///  
        public int Select(int id,bool action) 
        { 
            AnnounceInfo model = new AnnounceInfo(); 
 
            if (action) 
            { 
                string filter = " [isSelected] = 1 "; 
                DataSet dataset = new DataSet(); 
 
                dataset = GetDataSet(filter); 
                //把其它的改为不是默认 
                if (dataset.Tables[0].Rows.Count > 0) 
                { 
                    for (int i = 0; i < dataset.Tables[0].Rows.Count; i++) 
                    { 
                        model = GetModel(dataset.Tables[0].Rows[i]); 
                        model.IsSelected = 0; 
                        Update(model); 
                    } 
                } 
            } 
 
            model = GetModel(id); 
            model.IsSelected = action ? 1 : 0; ; 
            return Update(model); 
        } 
 
        /// 
 
        /// 检查标题是否存在 
        /// 
 
        ///  
        ///  
        public bool IsExist(string title) 
        { 
            title = Utils.ReplaceBadSQL(title.Trim()); 
            if (string.IsNullOrEmpty(title)) 
                return false; 
            string filter = " title='" + title + "'"; 
 
            return Exist(filter); 
        } 
 
        /// 
 
        /// 快速搜索 
        /// 
 
        ///  
        ///  
        public DataSet QuickSearch(int searchType) 
        { 
            return dal.QuickSearch(searchType); 
        } 
 
        /// 
 
        /// 高级查询 
        /// 
 
        ///  
        ///  
        ///  
        public DataSet KeywordsSearch(string field, string keywords) 
        { 
            field = Utils.ReplaceBadSQL(field.Trim().ToLower()); 
            keywords = Utils.ReplaceBadSQL(keywords.ToLower().Trim()); 
            if (string.IsNullOrEmpty(field) || string.IsNullOrEmpty(keywords)) 
                return null; 
            return dal.KeywordsSearch(field, keywords); 
        } 
 
        #endregion 
    } 
}