c# - html标签内的正则表达式匹配
问题描述
我的html如下
<body><table><tr><td> <h4><span><strong><span>This Text</span></strong></span></h4> </td> <td> <h4><span><strong>That Text<br></strong></span></h4> </td> <td> <h4><span><strong><span>Some Text</span></strong></span></h4> </td> <td><span><strong>0 505 253 56 13</strong></span></td></tr><table></body>
以下正则表达式清除所有没有a|p|img 的标签
_QsHtml = Regex.Replace(_QsHtml, @"<\/?(?!a)(?!p)(?!img)\w*\b[^>]*>","", RegexOptions.Multiline);
我想仅将 ragex 应用于表格行(td)。我试过遵循正则表达式但不匹配。
<\/?td(?!a)(?!p)(?!img)\w*\b[^>]*td>
解决方案
好的,我已经解决了结合 Html Agility 完整工作代码的问题,如下所示
string _QsHtml = @"<body><table><tr><td> <h4><span><strong><span>This Text</span></strong></span></h4> </td> <td> <h4><span><strong>That Text<br></strong></span></h4> </td> <td> <h4><span><strong><span>Some Text</span></strong></span></h4> </td> <td><span><strong>0 505 253 56 13</strong></span></td></tr><table></body>";
var _HtmlDocument = new HtmlAgilityPack.HtmlDocument();
_HtmlDocument.OptionFixNestedTags = true;
_HtmlDocument.OptionAutoCloseOnEnd = true;
_HtmlDocument.OptionWriteEmptyNodes = true;
_HtmlDocument.LoadHtml(_QsHtml);
var FindTableRows = _HtmlDocument.DocumentNode.SelectNodes("//td");
if (FindTableRows != null)
{
foreach (var TableRow in FindTableRows.ToList())
{
string _InnerHtml = TableRow.InnerHtml;
_InnerHtml = Regex.Replace(_InnerHtml,
@"<\/?(?!a)(?!br)(?!img)\w*\b[^>]*>",
"", RegexOptions.Multiline);
TableRow.InnerHtml = _InnerHtml;
}
}