Question

I need to check if an element in XML file exists. After searching here, I have tried a code from one of very similiar questions I found here, so the code looks like this(it is looped using foreach so it checks every airport in group airports):

string icao = airport.Attributes.GetNamedItem("icao").Value;
            if(airports.SelectSingleNode("/vEsup/airports/airport/" + icao + "/departures")==null)
            {
                MessageBox.Show("I exist!");
            }

Please note that the message box is just for testing, I find it the easiest way to check if the code is working properly. However, I found out that whatever path I enter, it always shows the messagebox, regardless if it exist in the XML file or not.

Answer 1

You can use Linq to query specific xml nodes and attributes also.
Here is link to similar sample:
http://www.codearsenal.net/2012/07/c-sharp-load-xml-using-xlinq.html