XElement questions

[CSharper]

I have an XML and I am using XDocument to traverse the xml document. A
sample document look like the following
<root>
<node1>
<element1 name="n" type="1" />
</node1>
<node2 name='n1' type='2'>
<element2>test</element2>
</node2>
</root>

I would like to find out all the type attribute values for a given
name attribute. How can I do it with a simple linq? I am able to do it
with XmlDocument by writing recursion but there must be a easier way.
I tried the following but it is not giving any result


var result = from c in doc.Elements()
where ((c.Attribute("name") != null) &&
(c.Attribute("type") != null) &&
(c.Attribute("name").Value == 'n'))
select (string)c.Attribute("type").value;

When I debug, I can see only the root element get processed and none
of the other nodes get processed. The same when I applied Elements.

Could someone help?

 

[Martin Honnen]

var result = from c in doc.Elements()
where ((c.Attribute("name") != null) &&
(c.Attribute("type") != null) &&
(c.Attribute("name").Value == 'n'))
select (string)c.Attribute("type").value;

When I debug, I can see only the root element get processed and none
of the other nodes get processed. The same when I applied Elements.

Use
doc.Descendants()
instead of
doc.Elements()

 

[Alex Meleta]

Hi CSharper,

Use doc.Descendants() instead of doc.Elements() in your example to get it
work. And, by the way, string convertion in select is redundant coz Value
already is string.

Regards, Alex
[TechBlog] http://devkids.blogspot.com

C> I have an XML and I am using XDocument to traverse the xml document.
C> A
C> sample document look like the following
C> <root>
C> <node1>
C> <element1 name="n" type="1" />
C> </node1>
C> <node2 name='n1' type='2'>
C> <element2>test</element2>
C> </node2>
C> </root>
C> I would like to find out all the type attribute values for a given
C> name attribute. How can I do it with a simple linq? I am able to do
C> it with XmlDocument by writing recursion but there must be a easier
C> way. I tried the following but it is not giving any result
C>
C> var result = from c in doc.Elements()
C> where ((c.Attribute("name") != null) &&
C> (c.Attribute("type") != null) &&
C> (c.Attribute("name").Value == 'n'))
C> select (string)c.Attribute("type").value;
C> When I debug, I can see only the root element get processed and none
C> of the other nodes get processed. The same when I applied Elements.
C>
C> Could someone help?
C>

 

[Family Tree Mike]

The others have answered, but there is another option. You could change
doc.elements() to doc.DocumentElement.Elements(). It's just a style I like
that clarifies there is a document element to be skipped.

 

[CSharper]

The others have answered, but there is another option.  You could change
doc.elements() to doc.DocumentElement.Elements().  It's just a style I like
that clarifies there is a document element to be skipped.









- Show quoted text -

Excellent thanks Guys.