//HtmlString 获取的html页面的字符串

        //XmlPath 解析元素在html中的位置,像:XmlPath = "/html/body/div[3]/div[3]/div[1]/table"

        public static DataTable ParsingWeb(string HtmlString, string XmlPath)

        {

            try

            {

                //HtmlWeb web = new HtmlWeb();

                //HtmlDocument doc = web.Load(WebUrl);

                var doc = new HtmlDocument();

                doc.LoadHtml(HtmlString);

                DataTable htTable = new DataTable();

                var tablehtml = doc.DocumentNode.SelectSingleNode(XmlPath);

                if (tablehtml == null)

                {

                    return null;

                }

                var TrSelected = tablehtml.SelectNodes(".//tr");

                    foreach (HtmlNode row in TrSelected)

                    {

                        var Index = TrSelected.IndexOf(row);

                        if (TrSelected.IndexOf(row) == )

                        {

                            foreach (HtmlNode cell in row.SelectNodes("th|td"))  //有些table 表头是写在 td中的

                            {

                                htTable.Columns.Add(cell.InnerText, typeof(string));

                            }

                        }

                        else

                        {

                            DataRow TempRow = htTable.NewRow();

                            foreach (HtmlNode cell in row.SelectNodes("th|td"))

                            {

                                var position = row.SelectNodes("th|td").IndexOf(cell);

                                TempRow[htTable.Columns[position].ColumnName] = cell.InnerText;

                            }

                            htTable.Rows.Add(TempRow);

                        }

                    }

              return htTable;

            }

            catch (Exception e)

            {

                return null;

            }

        }