/// <summary> /// 判断当前节点是否已存在相同的 /// </summary> /// <param name="entity"></param> /// <returns></returns> public int ExistNum(CommentPicEntity entity) { ///id=0,判断总数,ID>0判断除自己之外的总数 string sql = @"Select count(1) from dbo.[CommentPic] WITH(NOLOCK) "; string where = "where "; if (entity.Id == 0) { } else { } sql = sql + where; DbCommand cmd = db.GetSqlStringCommand(sql); if (entity.Id > 0) { db.AddInParameter(cmd, "@Id", DbType.Int32, entity.Id); } object identity = db.ExecuteScalar(cmd); if (identity == null || identity == DBNull.Value) { return(0); } return(Convert.ToInt32(identity)); }
/// <summary> /// 根据主键值更新记录的全部字段(注意:该方法不会对自增字段、timestamp类型字段以及主键字段更新!如果要更新主键字段,请使用Update方法)。 /// 如果数据库有数据被更新了则返回True,否则返回False /// </summary> /// <param name="db">数据库操作对象</param> /// <param name="commentPic">待更新的实体对象</param> public int UpdateCommentPic(CommentPicEntity entity) { string sql = @" UPDATE dbo.[CommentPic] SET [PicUrl]=@PicUrl,[CommentId]=@CommentId WHERE [Id]=@id"; DbCommand cmd = db.GetSqlStringCommand(sql); db.AddInParameter(cmd, "@Id", DbType.Int32, entity.Id); db.AddInParameter(cmd, "@PicUrl", DbType.String, entity.PicUrl); db.AddInParameter(cmd, "@CommentId", DbType.Int32, entity.CommentId); return(db.ExecuteNonQuery(cmd)); }
/// <summary> /// 插入一条记录到表CommentPic,如果表中存在自增字段,则返回值为新记录的自增字段值,否则返回0。 /// 该方法提供给界面等UI层调用 /// </summary> /// <param name="commentPic">要添加的CommentPic数据实体对象</param> public int AddCommentPic(CommentPicEntity commentPic) { if (commentPic.Id > 0) { return(UpdateCommentPic(commentPic)); } else if (CommentPicBLL.Instance.IsExist(commentPic)) { return((int)CommonStatus.ADD_Fail_Exist); } else { return(CommentPicDA.Instance.AddCommentPic(commentPic)); } }
/// <summary> /// 插入一条记录到表CommentPic,如果表中存在自增字段,则返回值为新记录的自增字段值,否则返回0 /// </summary> /// <param name="db">数据库操作对象</param> /// <param name="commentPic">待插入的实体对象</param> public int AddCommentPic(CommentPicEntity entity) { string sql = @"insert into CommentPic( [PicUrl],[CommentId])VALUES ( @PicUrl,@CommentId); SELECT SCOPE_IDENTITY();" ; DbCommand cmd = db.GetSqlStringCommand(sql); db.AddInParameter(cmd, "@PicUrl", DbType.String, entity.PicUrl); db.AddInParameter(cmd, "@CommentId", DbType.Int32, entity.CommentId); object identity = db.ExecuteScalar(cmd); if (identity == null || identity == DBNull.Value) { return(0); } return(Convert.ToInt32(identity)); }
/// <summary> /// 读取记录列表。 /// </summary> /// <param name="db">数据库操作对象</param> /// <param name="columns">需要返回的列,不提供任何列名时默认将返回所有列</param> public IList <CommentPicEntity> GetCommentPicList(int pagesize, int pageindex, ref int recordCount) { string sql = @"SELECT [Id],[PicUrl],[CommentId] FROM (SELECT ROW_NUMBER() OVER (ORDER BY Id desc) AS ROWNUMBER, [Id],[PicUrl],[CommentId] from dbo.[CommentPic] WITH(NOLOCK) WHERE 1=1 ) as temp where rownumber BETWEEN ((@PageIndex - 1) * @PageSize + 1) AND @PageIndex * @PageSize" ; string sql2 = @"Select count(1) from dbo.[CommentPic] with (nolock) "; IList <CommentPicEntity> entityList = new List <CommentPicEntity>(); DbCommand cmd = db.GetSqlStringCommand(sql); db.AddInParameter(cmd, "@PageIndex", DbType.Int32, pageindex); db.AddInParameter(cmd, "@PageSize", DbType.Int32, pagesize); using (IDataReader reader = db.ExecuteReader(cmd)) { while (reader.Read()) { CommentPicEntity entity = new CommentPicEntity(); entity.Id = StringUtils.GetDbInt(reader["Id"]); entity.PicUrl = StringUtils.GetDbString(reader["PicUrl"]); entity.CommentId = StringUtils.GetDbInt(reader["CommentId"]); entityList.Add(entity); } } cmd = db.GetSqlStringCommand(sql2); using (IDataReader reader = db.ExecuteReader(cmd)) { if (reader.Read()) { recordCount = StringUtils.GetDbInt(reader[0]); } else { recordCount = 0; } } return(entityList); }
/// <summary> /// 读取记录列表。 /// </summary> /// <param name="db">数据库操作对象</param> /// <param name="columns">需要返回的列,不提供任何列名时默认将返回所有列</param> public IList <CommentPicEntity> GetCommentPicAll(int commentid) { string sql = @"SELECT [Id],[PicUrl],PicSuffix,[CommentId] from dbo.[CommentPic] WITH(NOLOCK) where CommentId=@CommentId "; IList <CommentPicEntity> entityList = new List <CommentPicEntity>(); DbCommand cmd = db.GetSqlStringCommand(sql); db.AddInParameter(cmd, "@CommentId", DbType.Int32, commentid); using (IDataReader reader = db.ExecuteReader(cmd)) { while (reader.Read()) { CommentPicEntity entity = new CommentPicEntity(); entity.Id = StringUtils.GetDbInt(reader["Id"]); entity.PicUrl = StringUtils.GetDbString(reader["PicUrl"]); entity.PicSuffix = StringUtils.GetDbString(reader["PicSuffix"]); entity.CommentId = StringUtils.GetDbInt(reader["CommentId"]); entityList.Add(entity); } } return(entityList); }
/// <summary> /// 根据主键值读取记录。如果数据库不存在这条数据将返回null /// </summary> /// <param name="db">数据库操作对象</param> /// <param name="columns">需要返回的列,不提供任何列名时默认将返回所有列</param> public CommentPicEntity GetCommentPic(int id) { string sql = @"SELECT [Id],[PicUrl],[CommentId] FROM dbo.[CommentPic] WITH(NOLOCK) WHERE [Id]=@id" ; DbCommand cmd = db.GetSqlStringCommand(sql); db.AddInParameter(cmd, "@Id", DbType.Int32, id); CommentPicEntity entity = new CommentPicEntity(); using (IDataReader reader = db.ExecuteReader(cmd)) { if (reader.Read()) { entity.Id = StringUtils.GetDbInt(reader["Id"]); entity.PicUrl = StringUtils.GetDbString(reader["PicUrl"]); entity.CommentId = StringUtils.GetDbInt(reader["CommentId"]); } } return(entity); }
/// <summary> /// 更新一条CommentPic记录。 /// 该方法提供给界面等UI层调用 /// </summary> /// <param name="commentPic">待更新的实体对象</param> /// <param name="columns">要更新的列名,不提供任何列名时默认将更新主键之外的所有列</param> public int UpdateCommentPic(CommentPicEntity commentPic) { return(CommentPicDA.Instance.UpdateCommentPic(commentPic)); }
/// <summary> /// 判断对象是否存在 /// </summary> /// <param name="dicEnum"></param> /// <returns></returns> public bool IsExist(CommentPicEntity commentPic) { return(CommentPicDA.Instance.ExistNum(commentPic) > 0); }