Regex match inside html tag

Question

My html as below

 <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>

The following regex cleans all tags without a|p|img

 _QsHtml = Regex.Replace(_QsHtml, @"<\/?(?!a)(?!p)(?!img)\w*\b[^>]*>","", RegexOptions.Multiline);

I would like to apply ragex for only table row (td). I have tried following regex but not matched.

<\/?td(?!a)(?!p)(?!img)\w*\b[^>]*td>

Possible duplicate of [RegEx match open tags except XHTML self-contained tags](https://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags) — Ivan García Topete, Jul 27 '18 at 23:02
regex may not be a good idea for parsing html: https://stackoverflow.com/a/590789/1287916; using html specific parsers may be a more solid approach. — smn.tino, Jul 27 '18 at 23:04
Are you trying to remove all tags except td or only td tags? — Slack Groverglow, Jul 27 '18 at 23:10
@smn.tino I would like replace with empty string unnecessary tags — Kerberos, Jul 27 '18 at 23:19
@CasimiretHippolyte yes I am using html agility for remove class but html agility not appropriate for replace string. It is using DOM structure — Kerberos, Jul 27 '18 at 23:21
@smn.tino: You linked a wrong answer, see NikiC comment in the accepted answer. — Casimir et Hippolyte, Jul 27 '18 at 23:21
td is actually a column. do you want to remove columns or a complete row with columns in it? — SirPilan, Jul 28 '18 at 00:18

score 0 · Answer 1 · answered Jul 27 '18 at 23:37

OK I have solved problem with combine Html Agility full working codes as below

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;

     }
 }

Regex match inside html tag

1 Answers1