Encoding XPath Expressions with both single and double quotes

Question

XPath (v1) contains no way to encode expressions.

If you only have single OR double quotes then you can use expressions such as

//review[@name=\"Bob         


        

Answer 1

Another variation...my concat() part is a little lazy, but at least it uses the whole value.

    /// 

    /// Returns an XPath string literal to use for searching attribute values (wraped in apostrophes, quotes, or as a concat function).
    /// 
    /// Attribute value to encode and wrap.
    public static string CreateXpathLiteral(string attributeValue)
    {
        if (!attributeValue.Contains("\""))
        {
            // if we don't have any quotes, then wrap string in quotes...
            return string.Format("\"{0}\"", attributeValue);
        }
        else if (!attributeValue.Contains("'"))
        {
            // if we have some quotes, but no apostrophes, then wrap in apostrophes...
            return string.Format("'{0}'", attributeValue);
        }
        else
        {
            // must use concat so the literal in the XPath will find a match...
            return string.Format("concat(\"{0}\")", attributeValue.Replace("\"", "\",'\"',\""));
        }
    }