// Rajdhani stoppped publishing epaper from 2016/09/16 // so we are removing this item from comboxboxItem in the UI public void RajdhaniInfo() { // http://rajdhani.com.np/epaper/898 example link that holds the link to pdf file in <iFrame> tag // map the user input date to the date id like 898 in the above link DateTime dateLinkedWith898id = new DateTime(2016, 09, 16); TimeSpan span = IssueDate.Subtract(dateLinkedWith898id); int dateDiff = span.Days; // dateDiff +ve if IssueDate is greater than 2016/09/16 is -ve is IssueDate is less than 2016/09/16 int dateId = (int)Math.Abs((decimal)898 + dateDiff); string linkToPdf = "http://rajdhani.com.np/epaper/" + dateId.ToString(); // use Html agility package to extract link pdf link from <iFrame> tag HtmlWeb web = new HtmlWeb(); HtmlDocument doc = web.Load(linkToPdf); DownloadLinkAndFileName = new List <Dictionary <string, string> >(); // select all iFrame tag using Xpath var iFrameTag = doc.DocumentNode.SelectNodes("//iframe"); if (iFrameTag != null) { foreach (var tag in iFrameTag) { string srcAttr = tag.Attributes["src"].Value; if (srcAttr.Substring(0).Contains(".pdf")) { DownloadLinkAndFileName.Add(new Dictionary <string, string> { { "dlLink", srcAttr }, { "filePathName", DownloadPath + "\\" + PaperName + "-" + _year + "-" + _month + "-" + _day + ".pdf" } }); } } } }