Question

I am trying to query some informations from xml with linq but I am getting error like this – Yes I have defined – using System.Linq
Could you tell me, where is a problem?
Thanks

Error 1 Could not find an
implementation of the query pattern
for source type
‘urn.P.IEEE.Item1671.Item2.Item2008.Item02.InstrumentDescription.InstrumentDescription’.
‘Select’ not found. D:\Documents and
Settings\e539951\my documents\visual
studio
2010\Projects\WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs 28 36 WindowsFormsApplication1

InstrumentDescription test = InstrumentDescription.Load(openFileDialog1.FileName);
 var query = from b in test
             select  new {  b.Identification };

Answer 1

In your code test represents just the root element of the document, so you can’t use LINQ on it – it’s not an sequence.

What you should do depends on how your XSD looks like. For example, if there can be multiple Identification elements under the root InstrumentDescription element, then just accessing test.Identitication gives you the list.