清除html注释,【已解决】C#去除Html的tag且同时去除注释

【问题】

C#中，想要去除html的标签tag，且同时去除注释comment。

【解决过程】

1.参考：

去试试用：public string htmlRemoveTag(string html)

{

HtmlAgilityPack.HtmlDocument htmlDoc = new HtmlAgilityPack.HtmlDocument();

htmlDoc.LoadHtml(html);

if (htmlDoc == null)

{

return "";

}

string filteredHtml = "";

foreach (var node in htmlDoc.DocumentNode.ChildNodes)

{

filteredHtml += node.InnerText;

}

return filteredHtml;

}

结果是，可以去除所有的tag了。

但是对于html的注释：          Frigidaire Mini Air Conditioner       Frigidaire’s FRA052XT7 5,000 BTU 115-Volt Window-Mounted Mini-Compact Air Conditioner is perfect for rooms up to 150 square feet.  It quickly cools a room on hot days and quie。。。。。。。。

却没去掉。

2.继续去除comment。

参考：

然后用：public string htmlRemoveTag(string html)

{

HtmlAgilityPack.HtmlDocument htmlDoc = new HtmlAgilityPack.HtmlDocument();

htmlDoc.LoadHtml(html);

if (htmlDoc == null)

{

return "";

}

// 1. remove all comments

//(1)get all comment nodes using XPATH

foreach (HtmlNode comment in htmlDoc.DocumentNode.SelectNodes("//comment()"))

{

//(2) remove comment node itself

comment.ParentNode.RemoveChild(comment);

}

//2. get all content

string filteredHtml = "";

foreach (var node in htmlDoc.DocumentNode.ChildNodes)

{

filteredHtml += node.InnerText;

}

return filteredHtml;

}

就实现了目的，结果是html的内容，没有tag，没有comment：”          Frigidaire Mini Air Conditioner       Frigidaire’s FRA052XT7 5,000 BTU 115-Volt Window-Mounted Mini-Compact Air Conditioner is perfect for rooms up to 150 square feet.  It quickly cools a room on hot days and quiet operation keeps you cool without keeping you awake. This unit features mechanical rotary  controls and top, full-width, 2-way air direction control. The antimicrobial mesh filter with side, slide-out access cleans the air  removing harmful bacteria. Low voltage start-up conserves energy and saves you money 。。。。。。。。。。。。。。

【总结】

想要去除html的tag，并且不保留对应的comment，那么可以用：using HtmlAgilityPack;

public string htmlRemoveTag(string html)

{

HtmlAgilityPack.HtmlDocument htmlDoc = new HtmlAgilityPack.HtmlDocument();

htmlDoc.LoadHtml(html);

if (htmlDoc == null)

{

return "";

}

// 1. remove all comments

//(1)get all comment nodes using XPATH

foreach (HtmlNode comment in htmlDoc.DocumentNode.SelectNodes("//comment()"))

{

//(2) remove comment node itself

comment.ParentNode.RemoveChild(comment);

}

//2. get all content

string filteredHtml = "";

foreach (var node in htmlDoc.DocumentNode.ChildNodes)

{

filteredHtml += node.InnerText;

}

return filteredHtml;

}