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POConditional Linq to XML select (nested select statements)
 

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  1. POConditional Linq to XML select (nested select statements)
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    <p>I'm trying to view all my friends from facebook who went to some school. I use FQL to get an xml file that contains all my friends with their education info. But i can't use FQL to select only those who went to the same school. Therefor, I'm trying to use Linq to XML to select only the users i want. I've tried some methods but those won't work for me.</p> <p>Here is my linq query:</p> <pre><code>XDocument doc = RemoveNamespace (XDocument.Load(url)); string[] search = {"Katho", "katho", "kortrijk" , "vhti"}; List&lt;string&gt; keys = new List&lt;string&gt;( search ); var user = (from usr in doc.Descendants("user") select new fbUser { name = usr.Element("name").Value, email = usr.Element("email").Value, current_location = StringExtensions.checkNull(usr.Element("current_location").Value,""), hometown_location = usr.Element("hometown_location").Value, pic = StringExtensions.checkNull(usr.Element("pic_square").Value,"http://www.fox16.com/media/avatar/default.jpg"), education_history = (from edu in usr.Descendants("education_info") //where usr.Element("education_history").HasElements where keys.Contains(edu.Element("name").Value) select new Education { name = StringExtensions.checkNull(edu.Element("name"),""), year = StringExtensions.checkNull(edu.Element("year"),""), school_type = StringExtensions.checkNull(edu.Element("school_type"),""), concentrations = from conc in edu.Descendants("concentrations") where (edu.Element("concentrations").HasElements) select new Concentration { name = StringExtensions.checkNull(conc.Element("concentration").Value, "") } }) }).Take(5) ; </code></pre> <p>EDIT: sample xml can be found here:<a href="http://pastebin.com/ayVUZL2x" rel="nofollow">sample XML</a></p> <p>There's one more problem. The school name is not an direct attribute from the fbUser object. Also in the xml file the schoolname can only be found here</p> <pre><code>&lt;user&gt;&lt;education_history&gt;&lt;education_info&gt;&lt;name&gt; </code></pre> <p>So here is my where statement:</p> <pre><code>where usr.Element("education_history").Element("education_info").Element(name").value == "schoolname" </code></pre> <p>Problem is that there is not always an education_history or education_info node in the xml. </p> <p>So i also need a way to work around this..</p> <p>Any help on this problem is very appreciated.</p> <p>I hope you can help me!</p> <p>Grtz</p>
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