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POConvert > to HTML entity equivalent within HTML string
 

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    <p>I'm trying to convert all instances of the > character to its HTML entity equivalent, &gt;, within a string of HTML that contains HTML tags. The furthest I've been able to get with a solution for this is using a regex.</p> <p>Here's what I have so far:</p> <pre><code> public static readonly Regex HtmlAngleBracketNotPartOfTag = new Regex("(?:&lt;[^&gt;]*(?:&gt;|$))(&gt;)", RegexOptions.Compiled | RegexOptions.Singleline); </code></pre> <p>The main issue I'm having is isolating the single > characters that are not part of an HTML tag. I don't want to convert any existing tags, because I need to preserve the HTML for rendering. If I don't convert the > characters, I get malformed HTML, which causes rendering issues in the browser.</p> <p>This is an example of a test string to parse:</p> <pre><code>"Ok, now I've got the correct setting.&lt;br/&gt;&lt;br/&gt;On 12/22/2008 3:45 PM, jproot@somedomain.com wrote:&lt;br/&gt;&lt;div class"quotedReply"&gt;&gt; Ok, got it, hope the angle bracket quotes are there.&lt;br/&gt;&gt;&lt;br/&gt;&gt; On 12/22/2008 3:45 PM, &gt; sbartfast@somedomain.com wrote:&lt;br/&gt;&gt;&gt; Please someone, reply to this.&lt;br/&gt;&gt;&gt;&lt;br/&gt;&gt;&lt;br/&gt;&lt;/div&gt;" </code></pre> <p>In the above string, none of the > characters that are part of HTML tags should be converted to &gt;. So, this:</p> <pre><code>&lt;div class"quotedReply"&gt;&gt; </code></pre> <p>should become this:</p> <pre><code>&lt;div class"quotedReply"&gt;&amp;gt; </code></pre> <p>Another issue is that the expression above uses a non-capturing group, which is fine except for the fact that the match is in group 1. I'm not quite sure how to do a replace only on group 1 and preserve the rest of the match. It appears that a MatchEvaluator doesn't really do the trick, or perhaps I just can't envision it right now. </p> <p>I suspect my regex could do with some lovin'.</p> <p>Anyone have any bright ideas?</p>
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    1. COKinda funny here... I think your example got eaten. You should check the "Code Sample" button in the editor when you want to paste something verbatim. Even I had to go back and edit my answer because I used the &gt and it translated it... :)
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    2. COOh, the irony. :)
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