public ActionResult LinkBlog(string urlStr)
        {
            Response response = new Response() { Code =1 };
            if (string.IsNullOrWhiteSpace(urlStr))
            {
                response.Code = 0;
                response.Message = "链接URL必填";
                return Json(response);
            }

            WebClient c = new WebClient();
            c.Encoding = Encoding.GetEncoding("UTF-8");
            string html = c.DownloadString(urlStr);

            HtmlDocument doc = new HtmlDocument();
            doc.LoadHtml(html);
            HtmlNode nodeinfo = doc.GetElementbyId("post_detail");

            //post_detail
            //
            HtmlNode nodetitle = doc.GetElementbyId("cb_post_title_url");

            //cnblogs_post_body

            HtmlNode nodecontent = doc.GetElementbyId("cnblogs_post_body");

            string htmlstr = nodeinfo.OuterHtml;

            Blog blog = new Blog();
            blog.Publish = true;
            blog.Title =string.Format("链接文章：{0}", nodetitle.InnerText);
            blog.Volume = 0;
            blog.Content = htmlstr;
            blog.CreateTime = DateTime.Now;
            string htmlsumm = nodecontent.InnerText.Replace(" ", "");
            int sublen = htmlsumm.Length;
            if (sublen > 80)
            {
                sublen = 80;
            }
            blog.Summary = htmlsumm.Substring(0, sublen);

            blog.Category=  categoryManager.FindRoot()[0];
            response = blogManager.AddBlog(blog);

            return Json(response);
        }