实现评论列表删除删除所有回复，怎么做？

Question

我在 C# 中有一个 ASP.NET MVC 应用程序，它是一个博客。在此用户可以 post 发表评论，并且可以对 post 和评论本身发表评论。这意味着我的评论 class 必须是递归的，这就是我所拥有的：

public class SubComment
{
        [Key]
        public int subCommentId { get; set; }
        public string message { get; set; }
        public DateTime time_posted { get; set; }
        public int parent_comment_id { get; set; }
        public bool read_by_parent { get; set; }
        public int parentFounder_comment_id { get; set; }
        public bool parentIsSub { get; set; }
        public virtual List<SubComment> SubComments { get; set; }

        [ForeignKey("customer")]
        public string UserId { get; set; }
        public Customer customer { get; set; }
}

现在我遇到的问题是，当删除评论时，还必须先删除任何嵌套的评论。由于每个评论都有一个评论列表，因此可以继续下去。关于如何实施此删除，我无法想出解决方案。

到目前为止，我可以找到请求删除的评论，并且可以找到对该特定评论的所有回复，但我需要的是所有嵌套评论，以便回复回复等。

这是我的相关操作代码：

  SubComment subComment = context.SubComments.Find(id);

  replies = context.SubComments
                   .Where(sc => sc.parent_comment_id == subComment.subCommentId && sc.parentIsSub == true)
                   .OrderByDescending(sc => sc.time_posted).ToList();

任何人都可以帮助我实现这个，任何答案都将不胜感激。

（我上传了一个类似的问题，我无法删除但它已关闭，所以它不能也没有答案，不幸的是）。

Answer 1

您可以在 SubComment 上创建一个方法 class.In 此方法循环遍历 SubComments 列表（并递归调用相同的方法）。当SubComment没有任何子评论时，您可以删除该Subcomment。

private void RemoveComment(context as DBContext)
{
    if (SubComments.Count > 0)
    {
        SubComment sc;
        foreach (sC in SubComments)
        {
            sC.RemoveComment(context)
        }
    }
    else
    {
        //your code to remove element
    }
 }

Answer 2

这是我评论过的最后一段代码，以供澄清。唯一要注意的是我添加到一个名为 subReplies 的列表的地方实际上应该是删除，但我的特定程序要求我以降序方式删除所以我存储在一个列表中，我稍后重组并为每个语句执行删除全部。

这里是使用 Aldert 的帮助：

  //this method will take in a comment that the user is requesting for deletion and runs on the post action of delete comment
    //confirm. As the class of sub comments is recursive this must loop on itself to locate all nested lists
    private void RemoveComment(SubComment subComment)
    {
        if (subComment.SubComments.Count > 0) //if the comment we want to delete has replies 
        {
            foreach (SubComment sC in subComment.SubComments) //for each reply 
            {
                if(sC.SubComments.Any()) //if the reply has its own replies 
                {
                    foreach(SubComment child_sC in sC.SubComments) //for each sub nested reply
                    {
                        RemoveComment(child_sC); //recall this method so that this nested reply becomes the parent in a manner
                    }
                }
                subReplies.Add(sC); //as we cannot delete in this order without crashing and causing errors to the database
                //, therefore, we will store all these comments in a list - store the reply to the comment
            }
        }
        subReplies.Add(subComment); //store the parent comment 
    }

实现评论列表删除删除所有回复，怎么做？

Implementing comment list deletion to delete all replies, how to?

c#

asp.net-mvc

nested-lists

recursive-datastructures