private async Task LoadForumDataAsync(CancellationTokenSource cts)
{
if (_forumData.Count > 0)
{
return;
}
// 读取数据
string url = "http://www.hi-pda.com/forum/search.php";
string htmlContent = await _httpClient.GetAsync(url, cts);
// 实例化 HtmlAgilityPack.HtmlDocument 对象
HtmlDocument doc = new HtmlDocument();
// 载入HTML
doc.LoadHtml(htmlContent);
var data = doc.DocumentNode;
var selectNode = data.Descendants().FirstOrDefault(n => n.Name.Equals("select") && n.GetAttributeValue("id", "").Equals("srchfid"));
if (selectNode == null)
{
return;
}
var groups = selectNode.ChildNodes.Where(n => n.Name.Equals("optgroup"));
if (groups == null)
{
return;
}
foreach (var group in groups)
{
string forumGroupName = group.Attributes[0].Value.Replace("--", string.Empty);
var forumGroup = new ForumCategoryModel {
ForumGroupName = forumGroupName
};
var groupItems = group.ChildNodes.Where(n => n.Name.Equals("option"));
if (groupItems == null)
{
return;
}
foreach (var item in groupItems)
{
int forumId = Convert.ToInt32(item.Attributes[0].Value);
string forumName = item.NextSibling.InnerText;
forumName = forumName.Replace(" ", string.Empty);
forumName = forumName.Trim();
forumGroup.Forums.Add(new ForumModel {
Id = forumId, Name = forumName
});
}
_forumData.Add(forumGroup);
}
}
public async Task <ActionResult> Category(int id)
{
using (var context = new ApplicationDbContext())
{
var category = await context.ForumCategories.FirstOrDefaultAsync(x => x.Id == id && !x.IsDeleted);
if (category == null)
{
return(View("ViewMessage", new ViewMessageModel(ViewMessageType.Warning, Resources.Forum.categoryNotFoundErrorTitle, string.Format(Resources.Forum.categoryNotFoundErrorMessage, id))));
}
var model = new ForumCategoryModel
{
Id = category.Id,
Name = category.Name,
Icon = category.Icon,
Forum = new ForumModel
{
Id = category.Forum.Id,
Name = category.Forum.Title,
Icon = category.Forum.Icon
},
Threads = category.Threads.Where(x => !x.IsDeleted).OrderByDescending(x => x.IsPinned).ThenByDescending(x => x.LastUpdate).Select(x => new ForumThreadModel
{
Id = x.Id,
Name = x.Title,
Description = x.Description,
PostCount = x.Posts.Count(g => !g.IsDeleted),
IsPinned = x.IsPinned,
Icon = x.Icon
}).ToList(),
LatestPosts = category.Threads.Where(x => !x.IsDeleted).SelectMany(x => x.Posts).Where(x => !x.IsDeleted).OrderByDescending(x => x.Id).Take(20).Select(x => new ForumPostModel
{
Id = x.Id,
Message = x.Message,
ThreadTitle = x.Thread.Title,
ThreadId = x.ThreadId,
ForumName = x.Thread.Category.Name
}).ToList()
};
var sanitizer = new HtmlSanitizer(allowedTags: new List <string> {
"p"
});
foreach (var message in model.LatestPosts)
{
message.Message = sanitizer.Sanitize(message.Message).Replace("<p>", "").Replace("</p>", "").Trim();
}
foreach (var threadModel in model.Threads)
{
var thread = category.Threads.Where(x => !x.IsDeleted).FirstOrDefault(x => x.Id == threadModel.Id);
if (thread != null)
{
var lastPost = thread.Posts.Where(x => !x.IsDeleted).OrderByDescending(x => x.Id).FirstOrDefault();
if (lastPost != null)
{
threadModel.LastPost = new ForumPostModel
{
Id = lastPost.Id,
Timestamp = lastPost.Timestamp,
User = new ForumUser
{
Name = lastPost.User.UserName
}
};
}
}
}
return(View("Category", model));
}
}
