Parse HTML using Xpath?

Question

I want to help my problem is: I get the data but the data obtained in duplicate. Thank you. HTML

<div id="items" style="width: 940px; height: 2176px; position: relative;">
        <div class="item masonry-brick" style="top: 0px; right: 0px; position: absolute;">
        <div class="picture">
            <a title="bikini" class="image" href="...-bikini.html">
                <img alt="bikini" src="...13508.jpg">
            </a>
            <div class="item-content">
                <h2><a href="...bikini.html">bikini</a></h2>
                <div class="item_social">
                    <ul>
                        <li><i class="fa fa-eye"></i><span>6</span></li>
                        <li><i class="fa fa-thumbs-o-up"></i><span>0</span></li>
                        <li><i class="fa fa-comments"></i><span>0</span></li>
                    </ul>
                </div>
                <div class="author-post">
                    <a class="author" href="....nuong" rel="nofollow">
                        <img class="author_avatar" alt="nương" src="....ae3c3d8a6a.png">

                        <span class="author_name">nương</span>
                        <ul class="author_item">
                            <li><span>13 giờ trước </span></li>
                        </ul>
                    </a>
                </div>
            </div>
        </div>
    </div>
//..... more item masonry-brick
 </div>

My code C# parsing "but the data obtained in duplicate image and text!",but full item number.

HtmlDocument htmlDocument = new HtmlDocument();
htmlDocument.LoadHtml(htmlPage);
List<Data> datas = new List<Data>();
foreach (var div in htmlDocument.DocumentNode.SelectNodes("//div[starts-with(@class, 'item')]"))

{
    Data newdata = new Data();
    newdata.Imgsrc = div.SelectSingleNode("//div[@class='picture']//img").Attributes["src"].Value;
    newdata.Title = div.SelectSingleNode("//div[@class='item-content']//h2").InnerText.Trim();
    newdata.Summary = div.SelectSingleNode("//div[@class='author-post']//span").InnerText.Trim();
    datas.Add(newdata);
}
lstDatas.ItemsSource = datas;

Thanks you! Error!

har07 · Accepted Answer · 2014-07-08 11:48:14Z

1

You need to add period/dot (.) at the beginning of your XPath to indicate that the XPath searching scope is local within current div context :

foreach (var div in htmlDocument.DocumentNode.SelectNodes("//div[starts-with(@class, 'item')]"))
{
    Data newdata = new Data();
    newdata.Imgsrc = div.SelectSingleNode(".//div[@class='picture']//img").Attributes["src"].Value;
    newdata.Title = div.SelectSingleNode(".//div[@class='item-content']//h2").InnerText.Trim();
    newdata.Summary = div.SelectSingleNode(".//div[@class='author-post']//span").InnerText.Trim();
    datas.Add(newdata);
}

Otherwise, the XPath will search within entire HtmlDocument and return the first matched node again and again in every iteration, that's why you got those duplicates.

answered Jul 8, 2014 at 11:48

har07

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