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I have a quite big XML output from an application. I need to process it with my program and then feed it back to the original program. There are pieces in this XML which needs to be filled out our replaced. The interesting part looks like this:
<sys:customtag sys:sid="1" sys:type="Processtart" />
<sys:tag>value</sys:tag>
here are some other tags
<sys:tag>value</sys.tag>
<sys:customtag sys:sid="1" sys:type="Procesend" />
and the document contains several pieces like this.
I need to get all XML pieces inside these tags to be able to make modifications on it. I wrote a regular expression to get those pieces but it does not work:
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(@"output.xml");
Regex regExp = new Regex(@"<sys:customtag(.*?)Processtart(.*?)/>(.*?)<sys:customtag (.*?)Procesend(.*?)/>", RegexOptions.Multiline & RegexOptions.IgnorePatternWhitespace & RegexOptions.CultureInvariant);
MatchCollection matches = regExp.Matches(xmlDoc.InnerXml);
If I leave the whole stuff in one line and call this regexp without the multiline option, it does find every occurences. By leaving the file as it is and set the multiline option, it does not work. What is the problem, what should I change? Or is there any easier way to get the XML parts between these tags without regexp?
754
Multiline option, or the m inline option, enables the regular expression engine to handle an input string that consists of multiple lines. It changes the interpretation of the ^ and $ language elements so that they match the beginning and end of a line, instead of the beginning and end of the input string.
Line breaks If you want to indicate a line break when you construct your RegEx, use the sequence “\r\n”.
The multiline mode is enabled by the flag m . It only affects the behavior of ^ and $ . In the multiline mode they match not only at the beginning and the end of the string, but also at start/end of line.
Pattern. MULTILINE or (? m) tells Java to accept the anchors ^ and $ to match at the start and end of each line (otherwise they only match at the start/end of the entire string).
i believe the option to use is RegexOptions.Singleline instead of RegexOptions.Multiline (src). allowing (.) to match newlines should work in your case.
...the mode where the dot also matches newlines is called "single-line mode". This is a bit unfortunate, because it is easy to mix up this term with "multi-line mode". Multi-line mode only affects anchors, and single-line mode only affects the dot ... When using the regex classes of the .NET framework, you activate this mode by specifying RegexOptions.Singleline, such as in Regex.Match("string", "regex", RegexOptions.Singleline).
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