public int Add(Channel entity)
 {
     return dal.Add(entity);
 }
 public bool Update(Channel entity)
 {
     return dal.Update(entity);
 }
        private Channel FillEntity(DataRow dr)
        {
            Channel entity = new Channel()
            {
                ID = DataTypeHelper.Convert<Int32>(dr["ID"]),
                ChannelName = DataTypeHelper.Convert<String>(dr["ChannelName"]),
                SortID = DataTypeHelper.Convert<Int32>(dr["SortID"]),
                Title = DataTypeHelper.Convert<String>(dr["Title"])
            };

            return entity;
        }