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POUsing Regex.Replace() to replace a list of words fails
 

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  1. POUsing Regex.Replace() to replace a list of words fails
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    <p>I am trying to replace words in a long string with some HTML-tags. I seem to miss something when trying to do this for multiple words from a List, it does however work nicely for single Words.</p> <p>Here is what i tried: For testing purposes i reduced and altered the string to this:</p> <pre><code>string strTest = "Ein toller Testtext mit Folge und Folgen sowie Folgen&lt;p&gt; und &lt;p&gt;Folge und Cauchyfolgen und Cauchy-Folgen und Folgeerscheinungen und Folgendem"; </code></pre> <p>The following code was used as a text to replace "Folge" with "WOW":</p> <pre><code>strResult = Regex.Replace(strTest, "\\b" + "Folge" + "\\b", "WOW"); </code></pre> <p>This resulted in: <code>"Ein toller Testtext mit WOW und Folgen sowie Folgen&lt;p&gt; und &lt;p&gt;WOW und Cauchyfolgen und Cauchy-Folgen und Folgeerscheinungen und Folgendem"</code>, which is the desired result for a single word.</p> <p>The following code resulted in the same, but is using my list of Objects, where "strWort" is the word i want to replace. Note the Value of listTooltips[39].strWort is "Folge".</p> <pre><code>strResult = Regex.Replace(strTest, "\\b" + listTooltips[39].strWort + "\\b", "WOW"); </code></pre> <p>In the next step i tried to do this for the whole list. So i did the following:</p> <pre><code>for (int i = 0; i &lt; listTooltips.Count(); i++) { strResult = Regex.Replace(strTest, "\\b" + listTooltips[i].strWort + "\\b", "WOW"); } </code></pre> <p>The result is an unchanged String. And i am lost as to why. As noted it does work if i only put one Word to replace, even if i use a specific object from my list. So i am quite sure the code for the list is not wrong, at least not completly.</p> <p>Additional things i tried:</p> <ul> <li>putting the value of each word into a seperate string and using that for the Regex.Replace. Failed.</li> <li>using a MessageBox.Show() to display the value of listTooltips[i].strWort to make sure, everything outputting as expected.</li> <li>using Regex.Match to check if the above code actually finds anything and yes, it does find everything. It just does not replace ist for some reason.</li> <li>not using Regex and going the string.replace-method instead. This is working with the above loop, but is causing differend unwanted results due to missing a filter / matchmode. i.e. "Folgen" is getting replaced to "WOWn" ect.</li> </ul> <p>Really wondering WHY this is behaing as it does mainly, to better understand it. But id love a solution as well of corse :-)</p> <p>Thanks in advance!</p>
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    1. USMarco Heumann
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