Article:		The .NET Schema Object Model
Subject:		Targeting a nested child element
Date:		2003-05-29 13:22:20
From:		Carol Skelly
Response to: Targeting a nested child element
Hi.. I also need to accomplish this in Vb.Net -- has anyone been successful with this? Also -- as you said the post-complilation Elements collection only contains top-level 'elements' -- so wouldn't we need to examine the Items collection instead to find any 'complextypes' or 'simpletypes'? ie: foreach (XmlSchemaElement parentElement in schema.Items) { Thanks for this great article! And please let me know if you can shed any light on the matter of traversing nested schema elements. Thanks!

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• Targeting a nested child element
  2004-11-15 06:36:28 Qoheleth
  
  VB.NET version of the above code would be

  
  Dim parentElement As XmlSchemaElement
  For Each parentElement In schema.Elements.Values
  'Try Casting to complex type
  Dim ct As XmlSchemaComplexType
  Try
  ct = DirectCast(parentElement.ElementType, XmlSchemaComplexType)
  Catch ex As InvalidCastException
  ct = Nothing
  End Try
  If Not ct Is Nothing Then
  Dim seq As XmlSchemaSequence = DirectCast(ct.ContentTypeParticle, XmlSchemaSequence)

  
  'Assuming it’s a sequence of elements
  Dim p As XmlSchemaParticle
  For Each p In seq.Items
  'Check if particle in seq is XmlSchemaElement
  Dim elem As XmlSchemaElement
  Try
  elem = DirectCast(p, XmlSchemaElement)
  Catch ex As InvalidCastException
  elem = Nothing
  End Try

  
  If Not elem Is Nothing Then
  Console.WriteLine(elem.QualifiedName.ToString());
  End If
  Next
  End If
  Next

  
  
  
  
  

• Targeting a nested child element
  2003-05-29 14:53:04 Priyamvadha Lakshminarayanan
  
  To access nested elements, you would need to traverse down the content model of the parent element as shown in my previous post.

  
  The elements in the post-compilation Elements collection each have an ElementType property which exposes the compiled complex type or simple type of that element. To get to the child elements, you need to navigate down the complex type.

  
  The items collection is used to add items to the schema prior to compilation.