public IActionResult Detail(int id)
{
var paper = paperManager.FindPaperById(id);
var topicIdList = JsonConvert.DeserializeObject <List <TopicId> >(paper.body);
var topicIdTitleList = new List <TopicIdTitle>();
foreach (var item in topicIdList)
{
var theTopic = topicManager.FindTitleById(item.id);
if (theTopic == null)
{
paperManager.CheckBodyById(id);
return(RedirectToAction("Detail", id));
}
topicIdTitleList.Add(
new TopicIdTitle {
id = item.id,
title = theTopic
}
);
}
ViewBag.Paper = paper;
ViewBag.TopicIdList = topicIdTitleList;
return(View());
}