How can I access to elemnts inside an xml file in c#

Question

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xml file is like this:
for example I want to access elemnts inside of Child1

HTML

<main>
 <child1>
    <part1>
       <a></a>
       
    </part1>
    <part1>
       <a></a>
       
    </part1>
 </child1>
 <child2>
    <part2>
       <c></c>
       <d></d>
    </part2>
 </child2>
 <child3>
    <part3>
    </part3>
 </child3>
</main>

before for below xml I wrote below code and that was OK.

HTML

<child1>
   <part1>
      <a></a>
      
   </part1>
   <part1>
      <a></a>
      
   </part1>
</child1>

C#

var doc = XElement.Load(txtRecivePath.Text);
                var ms = doc.Elements("part1").ToList();
                fields = ms.Select(s => new Class_PersonelInfo()
                {
                    prsnlCod = s.Element("a").Value;
                }

Posted 15-Feb-15 7:34am

mit62

Updated 15-Feb-15 15:08pm

v4

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Comments

Zoltán Zörgő 15-Feb-15 14:30pm

What exactly would you like to see after parsing your input?

mit62 15-Feb-15 14:37pm

I just want to know how can I access to values inside childe1.
this code was wrong:
var ms = doc.Elements("main").Elements("child1").ToList();
fields = ms.Select(s => new Class_PersonelInfo()
{
prsnlCod = s.Element("a").Value;
}

3 solutions

Solution 1

Use doc.Descendants("child1"); instead.

Posted 15-Feb-15 8:45am

Zoltán Zörgő

Comments

Thomas Daniels 15-Feb-15 15:02pm

Not exactly. child1 can be accessed fine through Elements, because it's a direct child element of main. The problem arises when fetching all a tags, because these are not a direct child of the child1 elements. Please see my answer, Solution 2.

Zoltán Zörgő 15-Feb-15 15:05pm

Yes, it works in that specific case, but you still need Descendants... so...

Solution 3

Try this...

HTML

var xdoc= XElement.Parse(xml);
var app = from p in xdoc.Elements("a")
          select p;

Posted 15-Feb-15 18:06pm

Member 10489937

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Thomas Daniels · Accepted Answer · 2015-02-15T08:59:00

You use s.Element("a"), but there are no a elements directly in your child1 tag. There are only a tags in your part1 tag.

To access the a-tags, you can use s.Descendants:

C#

var doc = XElement.Parse(xml);
var ms = doc.Elements("child1").ToList();
var allATags = ms.Select(s => s.Descendants(XName.Get("a")))
    .SelectMany(x => x)
    .ToList();

ms.Select returns a collection of collections of XElements here. SelectMany merges them all into one, and ToList converts it to a list. Now allATags contains all a-tags within child1-tags.