如何在网页上使用Linq解析html并将值添加到字符串中。我正在使用Metro应用程序上的HtmlAgilityPack,并希望带回3个值并将它们添加到字符串中。
这是url = http://explorer.litecoin.net/address/Li7x5UZqWUy7o1tEC2x5o6cNsn2bmDxA2N
我想从下面的内容中看到“belwo”
“余额:”, “交易”, “已接收”
WebResponse x = await req.GetResponseAsync();
HttpWebResponse res = (HttpWebResponse)x;
if (res != null)
{
if (res.StatusCode == HttpStatusCode.OK)
{
Stream stream = res.GetResponseStream();
using (StreamReader reader = new StreamReader(stream))
{
html = reader.ReadToEnd();
}
HtmlDocument htmlDocument = new HtmlDocument();
htmlDocument.LoadHtml(html);
string appName = htmlDocument.DocumentNode.Descendants // not sure what t
string a = "Name: " + WebUtility.HtmlDecode(appName);
}
}
答案 0 :(得分:2)
请尝试以下方法。您也可以考虑将桌子拉开,因为它比“p”标签中的自由文本形成得更好。
干杯,亚伦。
// download the site content and create a new html document
// NOTE: make this asynchronous etc when considering IO performance
var url = "http://explorer.litecoin.net/address/Li7x5UZqWUy7o1tEC2x5o6cNsn2bmDxA2N";
var data = new WebClient().DownloadString(url);
var doc = new HtmlDocument();
doc.LoadHtml(data);
// extract the transactions 'h3' title, the node we want is directly before it
var transTitle =
(from h3 in doc.DocumentNode.Descendants("h3")
where h3.InnerText.ToLower() == "transactions"
select h3).FirstOrDefault();
// tokenise the summary, one line per 'br' element, split each line by the ':' symbol
var summary = transTitle.PreviousSibling.PreviousSibling;
var tokens =
(from row in summary.InnerHtml.Replace("<br>", "|").Split('|')
where !string.IsNullOrEmpty(row.Trim())
let line = row.Trim().Split(':')
where line.Length == 2
select new { name = line[0].Trim(), value = line[1].Trim() });
// using linqpad to debug, the dump command drops the currect variable to the output
tokens.Dump();
'转储()'是一个LinqPad命令,它将变量转储到控制台,以下是转储命令输出的示例:
答案 1 :(得分:1)
你必须解析的文件不是最好的解析许多元素缺少类或至少id属性但你想得到的是第二个p标签 内容
你可以试试这个
HtmlDocument htmlDocument = new HtmlDocument();
htmlDocument.LoadHtml(html);
var pNodes = htmlDocument.DocumentNode.SelectNodes("//p")
[1].InnerHtml.ToString().Split(new string[] { "<br />" }, StringSplitOptions.None).Take(3);
string vl="Balance:"+pNodes[0].Split(':')[1]+"Transactions in"+pNodes[1].Split(':')[1]+"Received"+pNodes[2].Split(':')[1];