CODEWITHSUNDEEP
vb.netlinq
jercra
jercra

Reputation: 404

Generate Complex Object from LINQ to XML in VB .NET

I have an XML File that I am processing using LINQ. I want to basically serialize the XML data into custom objects but don't know how.

Simplified XML

<Data>
   <Group id="1">
      <Child id="1"/>
      <Child id="2"/>
      <Child id="3"/>
   </Group>
   <Group id="2">
      <Child id="1"/>
      <Child id="2"/>
      <Child id="3"/>
   </Group>
</Data>

I have a class called Group with a property called Children that is a list of (Child).

I can do the following in linq to generate the Enurable( of Group):

 dim g = From item In _
 XElement.Load("XMLFile.xml", LoadOptions.None)...<Group> _
 Select New nABLE4ConfigInfo.Group(item.@id)

How can I finish the above LINQ query to populate the Children property of the Group object?

Upvotes: 0

Views: 1260

Answers (2)

jercra
jercra

Reputation: 404

It's as simple as nested select statements and the right constructor on the class.

 Dim g = From item In _
      XElement.Load("XMLFile.xml", LoadOptions.None)...<Group> _
             Select New Group(id:=item.@id, _
                   Children:=(From c In item...<Child>  Select c.@id).ToList)

Upvotes: 1

Joel Coehoorn
Joel Coehoorn

Reputation: 415630

I think this class, paired with System.Xml.Serialization.XmlSerializer, will do the trick:

<Serializable> _
Public Class Data

   <Serializable> _
   Public Class Group

       <Serializable> _
       Public Class Child
           <XmlAttribute> _
           Public id As Integer
       End Class


       <XmlArray> _
       Public Child() As Child

       <XmlAttribute> _
       Public id As Integer

   End Class

  <XmlArray> _
  Public Group() As Group
End Class

The class may need some work yet: getting the arrays right can be tricky.

Upvotes: 2

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