检查下面的代码。在这里，我试图从html li标记中获取值列表。但是问题出在var allItems上，这没有抓住所有li的列表。之后，我想从每个li中获取三个值标题，价格，itemId。我已经像波纹管一样尝试并停留在var allItems上，因为这无法获取li数据。我该如何解决？
C＃
string html = string.Empty;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";
request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
var rnd = new Random();
var proxy = proxies[rnd.Next(proxies.Count())];
request.Proxy = new WebProxy(proxy.IP, proxy.Port);
request.Proxy.Credentials = new NetworkCredential(proxy.Username, proxy.Password);
request.Timeout = 10000;
request.KeepAlive = true;
using (var response = (HttpWebResponse)request.GetResponse())
{
using (var stream = response.GetResponseStream())
using (var reader = new StreamReader(stream))
{
html = reader.ReadToEnd();
}
}
HtmlDocument htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(html);
var allItems = htmlDoc.DocumentNode.SelectNodes("//ol[@id='searchResults']"); //this not returning all `li` from `searchResults`
var items = new List<ThirdPartyData>();
foreach (var item in allItems)
{
items.Add(new ThirdPartyData
{
title = "", // need to fill title from `li` <span class="main-title">
price = "", // need to fill price from `li` <span class="price__fraction">
ItemId = "" // need to fill ItemId from `li` class="rowItem item highlighted item--stack item--has-row-logo new "
});
}
HTML：
<ol id="searchResults" class="section search-results list-view stack search-results-core search-results-std list--has-row-logos list--has-fulfillment" imgtype="listingLightweight">
<li class="results-item highlighted article stack ">
<div class="rowItem item highlighted item--stack item--has-row-logo new " id="MLA810704332">
<div class="item__image item__image--stack">
<div class="images-viewer" item-url="https://articulo.mercadolibre.com.ar/MLA-810704332-asus-rog-phone-2-gaming-128gb8gb-dual-ram-snapdragon-855-_JM" item-id="MLA810704332">
<div class="image-content"> <a href="https://articulo.mercadolibre.com.ar/MLA-810704332-asus-rog-phone-2-gaming-128gb8gb-dual-ram-snapdragon-855-_JM" class="figure item-image item__js-link"> <img class="lazy-load" width="160" height="160" alt="Asus Rog Phone 2 Gaming 128gb+8gb Dual Ram - Snapdragon 855+" src="https://http2.mlstatic.com/asus-rog-phone-2-gaming-128gb-8gb-dual-ram-snapdragon-855-D_NQ_NP_832021-MLA31925153141_082019-V.webp"> </a> </div>
</div>
</div>
<div class="item__info-container highlighted ">
<div class="item__info item--hide-right-col ">
<h2 class="item__title list-view-item-title"> <a href="https://articulo.mercadolibre.com.ar/MLA-810704332-asus-rog-phone-2-gaming-128gb8gb-dual-ram-snapdragon-855-_JM" class="item__info-title"> <span class="main-title"> Asus Rog Phone 2 Gaming 128gb+8gb Dual Ram - Snapdragon 855+ </span> </a></h2>
<div class="price__container">
<div class="item__price "> <span class="price__symbol">$</span> <span class="price__fraction">51.999</span></div>
</div>
<div class="item__stack_column highlighted">
<div class="item__stack_column__info">
<div class="stack_column_item shipping highlighted">
<div class="item__shipping free-shipping highlighted">
<p class="stack-item-info "> Envío gratis</p>
</div>
</div>
<div class="stack_column_item status">
<div class="item__status">
<div class="item__condition"> </div>
</div>
</div>
</div>
</div>
<div class="stack_colum_right without-attributes without-reviews">
<div class="stack_column_right__bottom "> </div>
</div>
</div>
</div>
<form class="item__bookmark-form" action="/search/bookmarks/MLA810704332/make" method="post" id="bookmarkForm">
<button type="submit" class="bookmarks favorite " data-id="MLA810704332">
<div class="item__bookmark">
<div class="icon"></div>
</div>
</button>
<input type="hidden" name="method" value="add"> <input type="hidden" name="itemId" value="MLA810704332">
</form>
</div>
</li>
<li class="results-item highlighted article stack ">
<div class="rowItem item highlighted item--stack item--has-row-logo new " id="MLA799147144">
<div class="item__image item__image--stack">
<div class="images-viewer" item-url="https://articulo.mercadolibre.com.ar/MLA-799147144-2-pack-orzero-for-asus-rog-phone-zs600kl-tempered-glass-sc-_JM" item-id="MLA799147144">
<div class="image-content"> <a href="https://articulo.mercadolibre.com.ar/MLA-799147144-2-pack-orzero-for-asus-rog-phone-zs600kl-tempered-glass-sc-_JM" class="figure item-image item__js-link"> <img class="lazy-load" width="160" height="160" alt="[2 Pack] Orzero For Asus Rog Phone Zs600kl Tempered Glass Sc" src="https://http2.mlstatic.com/2-pack-orzero-for-asus-rog-phone-zs600kl-tempered-glass-sc-D_NQ_NP_934744-MLA31661896785_082019-V.webp"> </a> </div>
</div>
</div>
<div class="item__info-container highlighted ">
<div class="item__info item--hide-right-col ">
<h2 class="item__title list-view-item-title"> <a href="https://articulo.mercadolibre.com.ar/MLA-799147144-2-pack-orzero-for-asus-rog-phone-zs600kl-tempered-glass-sc-_JM" class="item__info-title"> <span class="main-title"> [2 Pack] Orzero For Asus Rog Phone Zs600kl Tempered Glass Sc </span> </a></h2>
<div class="price__container">
<div class="item__price "> <span class="price__symbol">$</span> <span class="price__fraction">923</span> <span class="price__decimals">21</span></div>
</div>
<div class="item__stack_column highlighted">
<div class="item__stack_column__info">
<div class="stack_column_item installments highlighted"><span class="item-installments item__installments--show-card-icon highlighted free-interest "> <span class="item-installments-text"> Hasta 6 cuotas sin interés </span></span> </div>
<div class="stack_column_item status">
<div class="item__status">
<div class="item__condition"> </div>
</div>
</div>
</div>
</div>
<div class="stack_colum_right without-attributes without-reviews">
<div class="stack_column_right__bottom "> </div>
</div>
</div>
</div>
<form class="item__bookmark-form" action="/search/bookmarks/MLA799147144/make" method="post" id="bookmarkForm">
<button type="submit" class="bookmarks favorite " data-id="MLA799147144">
<div class="item__bookmark">
<div class="icon"></div>
</div>
</button>
<input type="hidden" name="method" value="add"> <input type="hidden" name="itemId" value="MLA799147144">
</form>
</div>
</li>
</ol>