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    <p>Here is an alternative to Robert Rossney's StringBuilder approach, perhaps more intuitive:</p> <pre><code> /// &lt;summary&gt; /// Produce an XPath literal equal to the value if possible; if not, produce /// an XPath expression that will match the value. /// /// Note that this function will produce very long XPath expressions if a value /// contains a long run of double quotes. /// /// From: http://stackoverflow.com/questions/1341847/special-character-in-xpath-query /// &lt;/summary&gt; /// &lt;param name="value"&gt;The value to match.&lt;/param&gt; /// &lt;returns&gt;If the value contains only single or double quotes, an XPath /// literal equal to the value. If it contains both, an XPath expression, /// using concat(), that evaluates to the value.&lt;/returns&gt; public static string XPathLiteral(string value) { // If the value contains only single or double quotes, construct // an XPath literal if (!value.Contains("\"")) return "\"" + value + "\""; if (!value.Contains("'")) return "'" + value + "'"; // If the value contains both single and double quotes, construct an // expression that concatenates all non-double-quote substrings with // the quotes, e.g.: // // concat("foo",'"',"bar") List&lt;string&gt; parts = new List&lt;string&gt;(); // First, put a '"' after each component in the string. foreach (var str in value.Split('"')) { if (!string.IsNullOrEmpty(str)) parts.Add('"' + str + '"'); // (edited -- thanks Daniel :-) parts.Add("'\"'"); } // Then remove the extra '"' after the last component. parts.RemoveAt(parts.Count - 1); // Finally, put it together into a concat() function call. return "concat(" + string.Join(",", parts) + ")"; } </code></pre>
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    1. POSpecial Character in XPATH Query
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    1. USJonathan Gilbert
    1. USJonathan Gilbert
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    1. COfyi yours does not pass all of his tests.
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      1. USDaniel A. White
    2. COchange your add to the parts to quote the string.
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      1. USDaniel A. White
    3. COThanks, not sure how I missed that. Fixed. :-)
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      1. USJonathan Gilbert
 

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