以嵌入方式显示评论,例如Gmail评论
我有一个表comments
,就像这样,添加了一些模型内容:
+------------+---------+----------+-------------------+------------------------------------+---------------------------+ | comment_id | user_id | post_id | comment_parent_id | comment_content | comment_creation_datetime | +------------+---------+----------+-------------------+------------------------------------+---------------------------+ | 26 | 1 | 16329 | 0 | Första | 2016-01-24 10:42:49 | | 27 | 1 | 16329 | 26 | Svar till första | 2016-01-24 10:42:55 | | 28 | 1 | 16329 | 26 | Andra svar till förta | 2016-01-24 10:43:06 | | 29 | 1 | 16329 | 28 | Svar till "andra svar till första" | 2016-01-24 10:43:23 | +------------+---------+----------+-------------------+------------------------------------+---------------------------+
我试图显示评论Reddit样式,如下图所示:
即使我不明白如何开始从哪里开始…我试图谷歌搜索找到与我的要求相关的文章,但我没有找到它。 任何帮助…我在下面的评论中张贴图片,因为我没有声望点发布图片谢谢
假设你有一个课程评论
public class Comment { public int comment_id { get; set; } public int user_id { get; set; } public int post_id { get; set; } public int comment_parent_id { get; set; } public string comment_content { get; set; } public DateTime comment_creation_datetime { get; set; } public Comment(int comment_id, int user_id, int post_id, int comment_parent_id, string comment_content, DateTime comment_creation_datetime) { this.comment_id = comment_id; this.user_id = user_id; this.post_id = post_id; this.comment_parent_id = comment_parent_id; this.comment_content = comment_content; this.comment_creation_datetime = comment_creation_datetime; } public override string ToString() { return string.Format("{0} {1} {2}", this.comment_id, this.comment_content, this.comment_creation_datetime); } }
填写以下样本值
List cList = new List (); cList.Add(new Comment(26, 1, 16329, 0, "Första ", new DateTime(2016, 01, 24, 10, 42, 49))); cList.Add(new Comment(27, 1, 16329, 26, "Svar till första", new DateTime(2016, 01, 24, 10, 42, 55))); cList.Add(new Comment(28, 1, 16329, 26, "Andra svar till förta", new DateTime(2016, 01, 24, 10, 43, 06))); cList.Add(new Comment(29, 1, 16329, 28, "Svar till andra svar till första", new DateTime(2016, 01, 24, 10, 43, 23)));
你需要一个方法来排序项目
public static IEnumerable Sort(List SortItemsList, int parentID = 0) { foreach (var item in SortItemsList.Where(x => x.comment_parent_id == parentID).OrderBy(x => x.comment_id).ToList()) { yield return item; foreach (var child in Sort(SortItemsList, item.comment_id)) { yield return child; } } }
和一个确定每个项目的层次深度
public static int GetDepth(List cList, Comment cItem) { if (cItem.comment_parent_id == 0) { return 0; } else { return GetDepth(cList, cList.Where(x => x.comment_id == cItem.comment_parent_id).Single()) + 1; } }
例:
foreach (Comment cItem in Sort( cList)) { Console.WriteLine(GetDepth(cList, cItem) + " | " + cItem.ToString()); }
另一种方法是对这里描述的评论进行嵌套处理。