How to delete specific nodes from an XElement?

Question

I have created a XElement with node which has XML as below.

I want to remove all the \"Rule\" nodes if they contain \"conditions\" node.

Answer 1

passiveLead.DataXml.Descendants("Conditions").Remove();

Answer 2

You can try this approach:

var nodes = xRelation.Elements().Where(x => x.Element("Conditions") != null).ToList();

foreach(var node in nodes)
    node.Remove();

Basic idea: you can't delete elements of collection you're currently iterating.
So first you have to create list of nodes to delete and then delete these nodes.

Answer 3

You can use Linq:

xRelation.Elements()
     .Where(el => el.Elements("Conditions") == null)
     .Remove();

Or create a copy of the nodes to delete, and delete them after (in case the first method doesn't work):

List nodesToDelete = xRelation.Elements().Where(el => el.Elements("Conditions") == null).ToList();

foreach (XElement el in nodesToDeletes)
{
    // Removes from its parent, but not nodesToDelete, so we can use foreach here
    el.Remove();
}

Answer 4

I've made a small example for you:

XDocument document = XDocument.Parse(GetXml());
var rulesNode = document.Element("Rules");
if (rulesNode != null)
{
    rulesNode.Elements("Rule").Where(r => r.Element("Conditions") != null).Remove();
}

Answer 5

var el = xRelation.XPathSelectElement("/Rules/Rule/Conditions");
while (el != null)
{
      el.Remove();
      el = xRelation.XPathSelectElement("/Rules/Rule/Conditions");
}

Answer 6

just an idea:

Reverse the Linq "condition" and You will get a List without "Rule" nodes