public IDataResult <List <CommentListDto> > GetByPostId(string postId)//+++
{
// var entity= _commentDal.GetList();
/*var result = entity.Select(se=>new CommetListDto {
* Content=se.Content
* }).ToList();*/
// return new SuccessDataResult<List<CommetListDto>>(result);
// return new SuccessDataResult<List<Comment>>(_commentDal.GetList().ToList());
return(new SuccessDataResult <List <CommentListDto> >(_commentDal.GetByPostId(p => p.PostId == postId).ToList()));
}