我是一个有用的助手,可以为您翻译文本。
我在上面的代码中有注释,显示了什么有效,什么无效以及我想要实现的东西。
如果有人有任何建议或阅读资料,那就太好了!我一直在搜索论坛和示例,但没有找到我可以使用的东西。
我正在尝试使用HTML Agility包从一个网站上抓取一些数据。 我真的很难弄清楚如何在foreach中使用selectnodes,然后将数据导出到列表或数组中。
这是我目前使用的代码。
string result = string.Empty;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(http://www.amazon.com/gp/offer-listing/B002UYSHMM/);
request.Method = "GET";
using (var stream = request.GetResponse().GetResponseStream())
using (var reader = new StreamReader(stream, Encoding.UTF8))
{
result = reader.ReadToEnd();
}
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc.Load(new StringReader(result));
HtmlNode root = doc.DocumentNode;
string itemdesc = doc.DocumentNode.SelectSingleNode("//h1[@class='producttitle']").InnerText; //this works perfectly to get the title of the item
//HtmlNodeCollection sellers = doc.DocumentNode.SelectNodes("//id['bucketnew']/div/table/tbody/tr/td/ul/a/img/@alt");//this does not work at all in getting the alt attribute from the seller images
HtmlNodeCollection prices = doc.DocumentNode.SelectNodes("//span[@class='price']"); //this works fine getting the prices
HtmlNodeCollection nodes = doc.DocumentNode.SelectNodes("//div[@class='resultsset']/table/tbody[@class='result']/tr"); //this is the code I am working on to try to collect each tr in the result. I then want to eather add each span.price to a list from this and also add each alt attribute from the seller image to a list. Once I get this working I will want to use an if statement in the case that there is text for the seller name instead of an image.
List<string> sellers = new List<string>();
List<string> prices = new List<string>();
foreach (HtmlNode node in nodes)
{
HtmlNode seller = node.SelectSingleNode(".//img/@alt"); // I am not sure if this works
sellers.Add(seller.SelectSingleNode("img").Attributes["alt"]); //this definitly does not work and will not compile.
}
我在上面的代码中有注释,显示了什么有效,什么无效以及我想要实现的东西。
如果有人有任何建议或阅读资料,那就太好了!我一直在搜索论坛和示例,但没有找到我可以使用的东西。