Frequently Asked Questions on XML in .NET - Part 2
This is the next post in our ongoing FAQ series. See the original post here.
Q2: Conformance Level – Fragment
There are times when you want to work with a piece of XML that is not a fully conformant xml document; an example of this is when the XML does not have one root element. This type of XML is called an XML fragment. Here is an example of an XML fragment:
If this snippet of XML is used as the source for to the XmlReader, the following exception will occur:
“There are multiple root elements. Line X, position Y.”
This is a good exception message and tells the user exactly what the problem is: more than one root element is not allowed in an XML document. But what happens if you really want to work with XML of this form? A flag in the XmlReaderSettings class is provided for exactly this situation: XmlReaderSettings.ConformanceLevel.
Code snippet to correctly read the XML fragment:
string xmlFragmentStr = "<foo></foo><bar></bar>"; //create a reader settings objects and set the conformance level to fragment XmlReaderSettings xrs = new XmlReaderSettings(); xrs.ConformanceLevel = ConformanceLevel.Fragment; //create a reader using the reader settings XmlReader r = XmlReader.Create(new StringReader(xmlFragmentStr), xrs); r.Read();
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