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POMake links clickable except when they already are using C#
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  1. POMake links clickable except when they already are using C#
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    copied!<p>I found some examples that use regular expressions to detect patterns for URLs inside text paragraphs and add the HTML code to make them links. The problem I have with this approach is that, sometimes, the input paragraph contains both URLs written in plain text (which I want to convert to clickable) but also some URLs that already have markup for links. For example, consider this paragraph:</p> <pre class="lang-none prettyprint-override"><code>My favourite search engine is http://www.google.com but sometimes I also use &lt;a href="http://www.yahoo.com"&gt;http://www.yahoo.com&lt;/a&gt; </code></pre> <p>I only want to convert the Google link but leave the two Yahoo links as they are.</p> <p>What I am after is a C# function that uses regex to detect URLs and convert them but which ignores URLs that either have "A" markup tags surrounding them or inside an "A" tag already.</p> <p><strong>Edit</strong></p> <p>Here is what I have so far:</p> <pre><code>PostBody = "My favourite search engine is http://www.google.com but sometimes I also use &lt;a href=\"http://www.yahoo.com\"&gt;http://www.yahoo.com&lt;/a&gt;"; String pattern = @"http(s)?://([\w+?\.\w+])+([a-zA-Z0-9\~\!\@\#\$\%\^\&amp;amp;\*\(\)_\-\=\+\\\/\?\.\:\;\'\,]*)?"; System.Text.RegularExpressions.Regex regex = new System.Text.RegularExpressions.Regex(pattern); System.Text.RegularExpressions.MatchCollection matches = regex.Matches(PostBody); for (int i = 0; i &lt; matches.Count; i++) { PostBody = PostBody.Replace(matches[i].Value, String.Format("&lt;a href=\"{0}\"&gt;{1}&lt;/a&gt;", matches[i].Value, matches[i].Value)); } ltrlPostBody.Text = PostBody; </code></pre> <p>And here is what I am getting (I split it in multiple lines for clarity):</p> <pre><code>My favourite search engine is &lt;a href="http://www.google.com"&gt;http://www.google.com&lt;/a&gt; but sometimes I also use &lt;a href="&lt;a href="&lt;a href="http://www.yahoo.com"&gt;http://www.yahoo.com&lt;/a&gt;"&gt; &lt;a href="http://www.yahoo.com"&gt;http://www.yahoo.com&lt;/a&gt;&lt;/a&gt;"&gt; </code></pre> <p>I only want to convert the first link (in this case) because it does not already make part of a link markup.</p>
 

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