Check if XML element exist using LINQ

Question

I am parsing an XML doc into a c# project to check if an Element named "Feature" exists. In c#, I am using what exist in the Feature Element to determine whether an if statement should run.

XML

<Projects>
 <Project>
   <Name>Test</Name>
    <Feature>AutoDev;AutoRev</Feature>
 </Project>
</Projects>

C#

var feature = (from project in XDocument.Load(xmlPath).Descendants("Project")                                     
where project.Element("Name").Equals(Project)                                     
select project.Element("Feature").Value).Single().Split(';');

if (names.Contains("Test"))
      //then load ticket variables....
   if (feature.Contains("AutoDev"))
      //then do this....

Right now I receive an error: Sequence contains no elements

Using the any method was suggested when loading Feature to check if the element exist in the array. Not sure how to implement this though.

Use `SingleOrDefault()` instead of `Single()` that way you will get a null value if nothing is found, instead of an exception. — JNYRanger, Sep 25 '13 at 14:48
Thanks JNYRanger, I will add and test. Anirudh - ev.PortfolioProject grabs the Project name from the app tier. — blkhdy, Sep 25 '13 at 15:07

score 3 · Accepted Answer · answered Sep 25 '13 at 14:44

3

project.Element("Name").Equals(ev.PortfolioProject)

should be

project.Element("Name").Value.Equals(ev.PortfolioProject)
                        ^

answered Sep 25 '13 at 14:44

Anirudha

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once added I get a differnt exception, "Duplicate Work Item" But this will get me further along my path to completion. Thank you! – blkhdy Sep 25 '13 at 15:08
@blkhdy use First instead of Single method – Anirudha Sep 25 '13 at 15:35

score 1 · Answer 2 · answered Sep 25 '13 at 14:44

I think you are missing the .Value in project.Element("Name")

Try this:

var feature = (from project in XDocument.Load(xmlPath).Descendants("Project")                                     
where project.Element("Name").Value.Equals(ev.PortfolioProject)                                     
select project.Element("Feature").Value).Single().Split(';');

Check if XML element exist using LINQ

2 Answers2