public bool DeleteComment(CommentDetailRAO rao)
{
using (var ctx = new ApplicationDbContext())
{
var comment = ctx.Comments.FirstOrDefault(c => c.CommentId == rao.CommentId);
if (comment == null)
{
return(false);
}
var children = ctx.Comments.Where(c => c.ParentId == rao.CommentId).ToList();
var deletThis = new HashSet <CommentEntity> {
comment
};
foreach (var c in children)
{
deletThis.Add(c);
}
int count = 0;
var nextGen = new List <CommentEntity>();
do
{
nextGen = new List <CommentEntity>();
count = deletThis.Count;
foreach (var c in deletThis)
{
var newComments = ctx.Comments.Where(nG => nG.ParentId == c.CommentId).ToList();
foreach (var newCom in newComments)
{
if (deletThis.Contains(newCom))
{
continue;
}
nextGen.Add(newCom);
}
}
foreach (var c in nextGen)
{
deletThis.Add(c);
}
}while (deletThis.Count > count);
foreach (var c in deletThis)
{
ctx.Comments.Remove(c);
}
return(ctx.SaveChanges() == deletThis.Count);
}
}
public ActionResult Delete(CommentDetailDTO dto)
{
var svc = GetCommentService();
var rao = new CommentDetailRAO
{
CommentId = dto.CommentId,
Content = dto.Content,
GroupId = dto.GroupId
};
if (svc.DeleteComment(rao))
{
return(RedirectToAction("Index", "Group", new { id = dto.GroupId }));
}
else
{
return(RedirectToAction("Index", "Group", new { id = dto.GroupId }));
}
}
