Question

我需要擺脫<!-- custom ads -->和<!-- /custom ads --> 之間的部分代碼片段。

<!-- custom ads --> 
<div style="float:left"> 
    <!-- custom_Forum_Postbit_336x280 --> 
    <div id='div-gpt-ad-1526374586789-2' style='width:336px; height:280px;'> 
    <script type='text/javascript'> 
     googletag.display('div-gpt-ad-1526374586789-2'); 
    </script> 
    </div> 
</div> 
<div style="float:left; padding-left:20px"> 
    <!-- custom_Forum_Postbit_336x280_r --> 
    <div id='div-gpt-ad-1526374586789-3' style='width:336px; height:280px;'> 
    <script type='text/javascript'> 
     googletag.display('div-gpt-ad-1526374586789-3'); 
    </script> 
    </div> 
</div> 
<div class="clear"></div> 

<br> 
<!-- /custom ads --> 


<!-- google_ad_section_start -->Some Text,<br> 
Some More Text...<br> 
<!-- google_ad_section_end --> 

我已經可以找到這個XPath //comment()[contains(., 'custom')]兩個意見，但現在我堅持瞭如何刪除一切，這是那些「標籤」之間。

 foreach (var comment in htmlDoc.DocumentNode.SelectNodes("//comment()[contains(., 'custom')]")) 
     { 
      MessageBox.Show(comment.OuterHtml); 
     } 

有什麼建議嗎？

Answer 1

//find all comment nodes that contain "custom ads" 
var nodes = doc.DocumentNode 
       .Descendants() 
       .OfType<HtmlCommentNode>() 
       .Where(c => c.Comment.Contains("custom ads")) 
       .ToList(); 
//create a sequence of pairs of nodes 
var nodePairs = nodes 
    .Select((node, index) => new {node, index}) 
    .GroupBy(x => x.index/2) 
    .Select(g => g.ToArray()) 
    .Select(a => new { startComment = a[0].node, endComment = a[1].node}); 

foreach (var pair in nodePairs) 
{ 
    var startNode = pair.startComment; 
    var endNode = pair.endComment; 
    //check they share the same parent or the wheels will fall off 
    if(startNode.ParentNode != endNode.ParentNode) throw new Exception(); 
    //iterate all nodes inbetween 
    var currentNode = startNode.NextSibling; 
    while(currentNode != endNode) 
    { 
     //currentNode won't have siblings when we trim it from the doc 
     //so grab the nextSibling while it's still attached 
     var n = currentNode.NextSibling; 
     //and cut out currentNode 
     currentNode.Remove(); 
     currentNode = n; 
    } 
}