Help with LINQ to update an XDocument

Question

Hello,
I have some xml:

<Response TaskId="2429">
  <message>Run for cover.</message>
  <element location="proj\survival.cs"/>
  <element location="proj\run.cs"/>
</Response>

I would like to add an attribute to each item:

<element location="proj\run.cs" status="running"/>

Is that possible with LINQ in C#? Thanks any tips...

Answer 1

Sure. See the following link: http://www.hookedonlinq.com/LINQtoXML5MinuteOverview.ashx

XElement xml = new XElement( "Response", 
                             new XAttribute( "TaskId", "2429" ),
                             new XElement( "message", "Run for cover" ),
                             new XElement( "element",
                                 new XAttribute( "location", "proj\survival.cs" ),
                                 new XAttribute( "status", "running" ) ),
                             new XElement( "element",
                                 new XAttribute( "location", "proj\run.cs" ),
                                 new XAttribute( "status", "running" ) ) );

You can see above that it builds out the XML structure with nested calls. All you need to do is include the 'new Attribute' call as part of the LINQ structure to generate a new attribute.

UPDATE: If you want to add attributes to the result of a query, do the following:

var query = from node in xml.Descendants( "element" )
            select node;

foreach( var element in query )
{
    element.SetAttributeValue( "status", "running" );
}