How to build specific XML in C#?

Question

I am reading and building a new xml string in C# like this:

private string XmlString
{
    get
    {
        if (my_xml.Nodes().Count() > 0)
        {
            var param = new XElement("param");

            var ids = my_xml.Elements("ID").ToList();
            foreach (var id in ids)
            {
                param.Add(new XElement("ids", new XElement("ID", id.Value)));
            }
            return param.ToString();
        }
        return null;
    }
}

I get a xml string which is something like:

<param>
    <ids>
        <id>2</id>
    </ids>
</param>

How should look like my method to get a xml string like this one with = :

  <param>
        <ids id="2"/>
  </param>

What if my_xml as more than one ID element? Where do you expect to set all the id attributes? Should there be more than one ids element in that case? — juharr
– juharr, Commented Nov 27, 2019 at 0:39
Does this answer your question? How to put attributes via XElement — xdtTransform
– xdtTransform, Commented Nov 27, 2019 at 7:25
@juharr I put Anu Viswan's answer in a foreach loop. It is working with many id's — Hrvoje T
– Hrvoje T, Commented Nov 27, 2019 at 19:05

Anu Viswan · Accepted Answer · 2019-11-27 03:57:43Z

3

You could use SetAttributeValue for adding an attribute.

var xElement = new XElement("ids"); 
xElement.SetAttributeValue("id",id.Value);
param.Add(xElement);

Alternatively, you could also use an override of XElement Constructor

param.Add(new XElement("ids", new XAttribute("id", id.Value)));

edited Nov 27, 2019 at 3:57

answered Nov 27, 2019 at 0:04

Anu Viswan

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1 Comment

Hrvoje T Over a year ago

That's it! I see you added .Value too. Thanks!

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