问使用HtmlAgilityPack获取html表的最后一个<tr>。

EN

 <table id="test">
            <tr>
                <td>ID</td>
                <td>Name</td>
                <td>Age</td>
            </tr>
            <tr>
                <td>1</td>
                <td>Yasoda</td>
                <td>21</td>
            </tr>

            <tr>
                <td>2</td>
                <td>Samantha</td>
                <td>25</td>
            </tr>

            <tr>
                <td>3</td>
                <td>Sajee</td>
                <td>26</td>
            </tr>

        </table>

 public String getFinalNodeValue(String URL)
        {
            var webGet = new HtmlWeb();
            var pageSource = webGet.Load(URL);

            var table = pageSource.DocumentNode.SelectSingleNode("//table[@id='test']//tr[1]");


            string id = null;


            IEnumerable<HtmlNode> trNodes = table.DescendantsAndSelf();

            foreach (var currentItem in trNodes)
            {
                if (currentItem == trNodes.Last())
                {
                    IEnumerable<HtmlNode> tdNodes = currentItem.Descendants();

                    foreach (var x in tdNodes)
                    {
                        if(x == tdNodes.First())
            {
                id = x.InnerText;
            }
            else
            {
                break;
            }
                    }

                }
                else
                {
                    continue;
                }
            }

            return id;

        }