LINQ 增，删，改 ，查 等等。。

LINQ 增，删，改 ，查 等等。。

2008-12-15 15:22

//获取连接         private OpalsoftUBDataDataContext db = new OpalsoftUBDataDataContext("Data Source=192.168.1.104;Initial Catalog=Opalsoft.UB;User ID=sa;Password=123");         #region 添加产品的类型         /// <summary>         /// 添加产品的类型         /// </summary>         /// <param name="category">产品的类型对象</param>         public void AddCategory(Category category)         {             db.Category.InsertOnSubmit(category);             db.SubmitChanges();         }         #endregion         #region 用户收藏,关注 产品类型         /// <summary>         /// 添加用户收藏，关注 产品类型         /// </summary>         /// <param name="bookmark">用户收藏产品类型对象</param>         public void AddUserCategory(Bookmark bookmark)         {             db.Bookmark.InsertOnSubmit(bookmark);             db.SubmitChanges();         }         #endregion         #region 用户删除收藏产品类型         /// <summary>         /// 用户删除收藏产品类型         /// </summary>         /// <param name="bookmark">Bookmark 对象</param>         public void DeleteUserCategory(Bookmark bookmark)         {             Bookmark newbookmark = db.Bookmark.Single(p => p.bm_id == bookmark.bm_id);             newbookmark.status = "X";             db.SubmitChanges();         }         #endregion         #region 查询用户有没有添加过记录         /// <summary>         /// 查询用户有没有添加过记录         /// </summary>         /// <param name="UserID">用户id</param>         /// <param name="bm_link_id">收藏关注id</param>         /// <param name="type">类型</param>         /// <returns>bool 是否有该记录</returns>         public bool UserCategoryCount(int userID, int bm_link_id, string type)         {             bool temp = true;             int annal = db.Bookmark.Count(p => p.user_id == userID && p.bm_link_id == bm_link_id && p.bm_link_type == type);             if (annal != 0)             {                 temp = false;             }             return temp;         }         #endregion         #region 收藏产品改变状态为A         /// <summary>         /// 收藏产品改变状态为A         /// </summary>         /// <param name="bookmark">Bookmark 对象</param>         public void UpdateUserCategory(Bookmark bookmark)         {             Bookmark newbookmark = db.Bookmark.Single(p => p.bm_id == bookmark.bm_id);             newbookmark.status = "A";             db.SubmitChanges();         }         #endregion         #region 获取用户的关注的收藏         /// <summary>         /// 获取用户的关注的收藏         /// </summary>         /// <param name="userID">用户id</param>         /// <param name="type">类型</param>         /// <returns>list集合</returns>         public List<Bookmark> GetUserUserCategory(int userID, string type)         {             List<Bookmark> list = db.Bookmark.Where(p => p.user_id == userID && p.bm_link_type == type && p.status == "A").ToList<Bookmark>();             return list;         }         #endregion         #region 获取上一级产品类型         /// <summary>         /// 获取上一级产品类型         /// </summary>         /// <param name="UpCID">上一级id，0为一级id</param>         /// <returns>list集合</returns>         public List<Category> GetCategory(int UpCID)         {             List<Category> list = db.Category.Where(p => p.parent_cate_id == UpCID && p.status == "A").ToList<Category>();             return list;         }         #endregion //下面写一个删除的 由于我们做的都是修改状态 所以多写一个方法！-_-         public void DeleteSample()         {             db.Category.DeleteOnSubmit(db.Category.Single(c => c.cate_id == 4));         }