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POCreate Filtered XmlNodeList
 

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    <p>I have XML data containing image information. My first goal is to create a filtered <code>XmlNodeList</code> (ex. return all of the images where <code>color == yellow</code>). The ultimate goal is to be able to return a list of names of images where <code>color == yellow</code> (returning an entire filtered <code>XmlNodeList</code> is great, but I will really just need one element within that filtered list, such as a name or id).</p> <p>In my case, the root node is called <code>Images</code>, and I want to be able to search amongst each <code>Image</code> node. My XML data has no XML attributes, so every bit of data is represented as an element (making the color 'yellow' a child node of an image, not an attribute of an image).</p> <p>XML</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8" standalone="yes"?&gt; &lt;Images xmlns="http://oec.api.opsource.net/schemas/server" xmlns:ns9="http://oec.api.opsource.net/schemas/multigeo" xmlns:ns5="http://oec.api.opsource.net/schemas/vip" xmlns:ns12="http://oec.api.opsource.net/schemas/storage" xmlns:ns6="http://oec.api.opsource.net/schemas/whitelabel" xmlns:ns13="http://oec.api.opsource.net/schemas/manualimport" xmlns:ns7="http://oec.api.opsource.net/schemas/datacenter" xmlns:ns10="http://oec.api.opsource.net/schemas/reset" xmlns:ns8="http://oec.api.opsource.net/schemas/general" xmlns:ns11="http://oec.api.opsource.net/schemas/support" xmlns:ns2="http://oec.api.opsource.net/schemas/directory" xmlns:ns4="http://oec.api.opsource.net/schemas/network" xmlns:ns3="http://oec.api.opsource.net/schemas/organization"&gt; &lt;Image&gt; &lt;id&gt;mcd93jf8dd&lt;/id&gt; &lt;name&gt;cat&lt;/name&gt; &lt;color&gt;yellow&lt;/color&gt; &lt;/Image&gt; &lt;Image&gt; &lt;id&gt;d4b8l23sas&lt;/id&gt; &lt;name&gt;dog&lt;/name&gt; &lt;color&gt;yellow&lt;/color&gt; &lt;/Image&gt; &lt;/Images&gt; </code></pre> <p>My original source of XML data is a stream. I have figured out ways of iterating through the different levels of my XML hierarchy using foreach loops, but I keep running into issues of not having all the methods available that I need on child nodes. Advice elsewhere seems to suggest using <code>XPath</code> to implement my filter, but I could not get that to work with what I have got thus far:</p> <p>C#</p> <pre><code>//'stream' previously defined as a Stream XmlReader reader = XmlReader.Create(stream); XmlDocument xml = new XmlDocument(); xml.Load(reader); XmlElement root = xml.DocumentElement; XmlNodeList images = root.ChildNodes; foreach (XmlNode image in images) { XmlNodeList attributes = image.ChildNodes; foreach (XmlNode attribute in attributes) { //do stuff } } </code></pre>
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