I am parsing a xml document, I need find out the gid (an attribute) value (3810).

Based on SelectSingleNode(). I found it is not easy to find the attribute name and it's value.

Can I use this method or I must switch to other way.

Attached my code.

How can I use book obj to get the attribute value3810 for gid. Thank you.

My test.xml file as below

<?xml version="1.0" ?>
<root>
   <VersionInfo date="2007-11-28" version="1.0.0.2" />
   <Attributes>
      <AttrDir name="EFEM" DirID="1">
         <AttrDir name="Aligner" DirID="2">
            <AttrDir name="SequenceID" DirID="3">
               <AttrObj text="Slot01" gid="3810" unit="" scale="1" />
               <AttrObjCount value="1" />
           </AttrDir>
         </AttrDir>
      </AttrDir>
   </Attributes>
</root>

I wrote the test.cs as below

public class Sample
{    
    public static void Main()
    {    
        XmlDocument doc = new XmlDocument();
        doc.Load("test.xml");

        XmlNode book;
        XmlNode root = doc.DocumentElement;

        book = root.SelectSingleNode("Attributes[AttrDir[@name='EFEM']/AttrDir[@name='Aligner']/AttrDir[@name='SequenceID']/AttrObj[@text='Slot01']]");

        Console.WriteLine("Display the modified XML document....");
        doc.Save(Console.Out);
    }
}

[Update 06/10/2010]

1. The xml file is a complex file. Included thousands of gids. But for each of Xpath, the gid is unique.

2. I load the xml file to a TreeView control. this.treeView1.AfterSelect += new System.Windows.Forms.TreeViewEventHandler(this.treeView1_AfterSelect);. When treeView1_AfterSelect event occurred, the e.Node.FullPath will return as a String Value.

3. I parse the string Value e.Node.FullPath. Then I got the member of XPath Above. Then I tried to find which gid item was selected.

I need find the gid value as a return value indeed.