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BOOK: Professional C# 2008 ISBN: 978-0-470-19137-8
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Old February 4th, 2010, 02:28 AM
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Default Ch 29. LINQ to XML compile error

The code snippet:

Code:
  XDocument xdoc = XDocument.Load(@"C:\hamlet.xml"); 

  var query = from people in xdoc.Descendants("PERSONA") select people.Value;

  Console.WriteLine("{0} Players Found", query.Count());
  Console.WriteLine();

  foreach (var item in query)
  {
      Console.WriteLine(item);
  }

  Console.ReadLine();
fails to compile in Visual C# 2008 Express. The error:

Error 1 Could not find an implementation of the query pattern for source type 'System.Collections.Generic.IEnumerable<System.Xml .Linq.XElement>'. 'Select' not found. Are you missing a reference to 'System.Core.dll' or a using directive for 'System.Linq'? C:\Users\DaveTheCaver\Desktop\ProC#Book\ch29 CodeSample\Chapter 29\ConsoleApplication1\ConsoleApplication1\Program .cs 15 40 ConsoleApplication1


appears to be complaining about xdoc.Descendants("PERSONA"). The project has a reference to the System.Core.DLL and a using System.Linq directive.

Is there another reason for this error?

Last edited by DaveTheCaver; February 4th, 2010 at 02:30 AM..
 
Old March 4th, 2011, 07:54 AM
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Default

Hi Dave !

Firstly try including this namespace System.Xml.Linq

Secondly check whether the XName in the Descendant method exist in your XML file.

Have u included in ur code ?
Using System.Core.Dll
Using System.Linq





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