我试图在提供的html（span）之间获取数据（在本例中为31）
这是原始代码（来自chrome中的inspect元素）
<span id="point_total" class="tooltip" oldtitle="Note: If the number is black, your points are actually a little bit negative. Don't worry, this just means you need to start subbing again." aria-describedby="ui-tooltip-0">31</span>
我有一个包含页面源的富文本框，这里是相同的代码，但在富文本框的第51行：
<DIV id=point_display>You have<BR><SPAN id=point_total class=tooltip jQuery16207621750175125325="23" oldtitle="Note: If the number is black, your points are actually a little bit negative. Don't worry, this just means you need to start subbing again.">17</SPAN><BR>Points </DIV><IMG style="FLOAT: right" title="Gain subscribers" border=0 alt="When people subscribe to you, you lose a point" src="http://static.subxcess.com/images/page/decoration/remove-1-point.png"> </DIV>
我该怎么做呢？我尝试了几种方法，但似乎没有一种方法适合我。
我正在尝试从此页面检索点值：http://www.subxcess.com/sub4sub.php 数字会根据您的身份而变化。
答案 0 :(得分：10)
您需要使用HtmlAgilityPack来执行此操作，这非常简单：
HtmlDocument doc = new HtmlDocument;
doc.Load("filepath");
HtmlNode node = doc.DocumentNode.SelectSingleNode("//span"); //Here, you can also do something like (".//span[@id='point_total' class='tooltip' jQuery16207621750175125325='23' oldtitle='Note: If the number is black, your points are actually a little bit negative. Don't worry, this just means you need to start subbing again.']"); to select specific spans, etc...
string value = node.InnerText; //this string will contain the value of span, i.e. <span>***value***</span>
正则表达式虽然是一个可行的选项，但如果可能的话，你通常会想要避免解析html（参见Here）
就可持续性而言，您需要确保了解页面源（即刷新几次，看看每次刷新后目标跨度是否嵌套在同一个父级中，请确保页面为以相同的通用格式等...，然后使用上述原则导航到跨度。）
答案 1 :(得分：9)
你可能非常具体：
var regex = new Regex(@"<span id=""point_total"" class=""tooltip"" oldtitle="".*?"" aria-describedby=""ui-tooltip-0"">(.*?)</span>");
var match = regex.Match(@"<span id=""point_total"" class=""tooltip"" oldtitle=""Note: If the number is black, your points are actually a little bit negative. Don't worry, this just means you need to start subbing again."" aria-describedby=""ui-tooltip-0"">31</span>");
var result = match.Groups[1].Value;
答案 2 :(得分：1)