Retrieve Specific Data from XML file

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Based on the code from the link "http://www.codeproject.com/Tips/146237/Reading-XML-documents-using-LINQ". If I need to retrieve the data of <Subject1> and <Subject2>, how should the new c# be by replacing this code "listBox1.Items.Add(b.Element("Subject").Value.Trim());"

Thanks!

C#

var books = from nodes in System.Xml.Linq.XElement.Load("Books.xml").Elements("Book") select nodes;
 
            if (books != null)
            {
                foreach (var b in books)
                {
                    listBox1.Items.Add(b.Element("Subject").Value.Trim());
 
                }
            }

XML

<Books>
  <Book>
    <Subject>
    <Subject1>Subject1a</Subject1>
    <Subject2>Subject1a</Subject2>
    </Subject>
    <Content>
      History,Geography
    </Content>
  </Book>
 
  <Book>
    <Subject>
    <Subject1>Subject2b</Subject1>
    <Subject2>Subject2b</Subject2>
    </Subject>
    <Content>
      Biology,Chemistry,Physics
    </Content>
  </Book>
</Books>

Posted 7-Jun-15 4:39am

deelll

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Comments

Sergey Alexandrovich Kryukov 7-Jun-15 11:09am

Wrong approach. You should right code understanding what you are doing, not play with existing fragment of code.
Programming is not replacing one fragment of code with another, it is thinking.
—SA

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Maciej Los · Answer 1 · 2015-06-09T11:00:00

It should be something like this:

C#

XDocument xdoc = XDocument.Load("fullfilepath.xml");

var qry  = xdoc.Root
		.Descendants("Subject")
		.Select(n=> new 
			{
				sub1 = n.Element("Subject1").Value,
				sub2 = n.Element("Subject2").Value
			}).ToList();

ListBox1.DataSource = qry;

Result:

sub1      sub2
Subject1a Subject1a 
Subject2b Subject2b

For further information, please see:
XDocument.Load Method (String)[^]
How to: Bind a Windows Forms ComboBox or ListBox Control to Data[^]