/// <summary>
/// 评论是否置顶操作
/// </summary>
/// <param name="commentid">评论id</param>
/// <param name="istop">是否置顶</param>
/// <returns></returns>
public static bool UpdateIsTop(int commentid, string istop)
{
return(CommentDal.UpdateIsTop(commentid, istop) == 1);
}