Getting XPath expression for an XMLNode

Getting XPath expression for an XMLNode

• MLangille

  Do you have a sample of that code  It would save me some time.
  

• JReuben1

  Yep, not built in support. We build XPath ourselves by navigating to the root element.
  
  

• Manes

  I have some C++ code that we use in VSTO to build the XPath for XMLNode which validates against schema etc. It is not an exact sample code that you are looking for. I will do this one time to save you time but please understand that it is the last time I am doing this - I have work to do as well.
  
  The idea though is something like this:
  
  // built the list of namespaces and basenames from the leaf node
  // up the tree
  List<string> namespaces = new List<string>;
  List<string> basenames = new List<string>;
  while (xmlNode.Parent() != null)
  {
     string namespaceURI = xmlnode.NamespaceURI;
     string  baseName = xmlnode.BaseName;
  
     namespaces.Add(namespaceURI);
     basenames.Add(baseName);
  }
  
  // iterate the lists backwards and construct the XPath
  StringBuilder xpath = new StringBuilder;
  int idx = 0;
  int count = namespaces.Count();
  for(idx = count - 1 ; idx >= 0 ; idx--)
  {
      xpath.Append("/" + namespaces[idx] + ":" + basenames);
  }
  
  You can of course alias the namespace to get shorter paths. This is left as an exercise for the reader.
  
  Hope it helps,
  Misha
  
  
  
• Getting XPath expression for an XMLNode