Delete node in XML file

Question

My XML file:

<?xml version="1.0" encoding="utf-8"?>
 <WebServices>
  <WebService>
   <Name>ServiceA</Name>
   <Uri>http://localhost:53683/api/home</Uri>
  </WebService>

  <WebService>
   <Name>ServiceB</Name>
   <Uri>http://localhost:50043/api/home</Uri>
  </WebService>
 </WebServices>

I want to delete node by Name. My code doesn't work.

 XDocument document = XDocument.Load(this.Path);
 //xDoc.Element("WebServices").Element("WebService").Elements("Name").Where(node => node.Value == "Name1").Remove();
   document.Save(this.Path);

It removes only "Name" node in WebService. I want to remove the "WebService" node from "WebServices". Any one can help?

Jon Skeet · Accepted Answer · 2016-03-11 11:01:52Z

1

Well, you've selected the child element - so you just need to select its parent:

xDoc.Root
    .Elements("WebService")
    .Elements("Name")
    .Where(node => node.Value == "Name1")
    .Select(node => node.Parent)
    .Remove();

Or you could change your Where call:

xDoc.Root
    .Elements("WebService")
    .Where(ws => (string) ws.Element("Name") == "Name1")
    .Remove();

answered Mar 11, 2016 at 11:01

Jon Skeet

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Comments

BWA · Accepted Answer · 2016-03-11 11:05:29Z

0

You can use xPath

XElement element = document.XPathSelectElement("//WebService[Name = 'ServiceA']");
element.Romove();

answered Mar 11, 2016 at 11:05

BWA

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Comments

Soner · Accepted Answer · 2016-03-11 12:13:09Z

You can try linq to xml

XDocument doc = XDocument.Load("input.xml");
var q = from node in doc.Descendants("Setting")

let attr = node.Attribute("name")
where attr != null && attr.Value == "File1"

select node;
q.ToList().ForEach(x => x.Remove());
doc.Save("output.xml");

or this below one

XmlDocument doc = new XmlDocument();
doc.Load(path);
XmlNodeList nodes = doc.SelectNodes("//Setting[@name='File1']");

for (int i = nodes.Count - 1; i >= 0; i--)
{
 nodes[i].ParentNode.RemoveChild(nodes[i]);
}
doc.Save(path);

If you need a class in order to delete you can also try below

private static void DeleteXmlNode(string path, string tagname, string searchconditionAttributename, string searchconditionAttributevalue)
{
    XmlDocument doc = new XmlDocument();
    doc.Load(path); 
    XmlNodeList nodes = doc.GetElementsByTagName(tagname);\
   //XmlNodeList nodes = doc.GetElementsByTagName("user");
    foreach (XmlNode node in nodes)
    {
        foreach (XmlAttribute attribute in node.Attributes)
        {
            if ((attribute.Name == searchconditionAttributename) && (attribute.Value == searchconditionAttributevalue))
            //if ((attribute.Name == "name") && (attribute.Value == "aaa"))
            {
                //delete.
                node.RemoveAll();
                break;
            }
        }
    }
    //save xml file.
    doc.Save(path);
}

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