如何在C＃中从XML删除元素

Question

I have the following XML File:

<HOUSE>
  <LOCATION>Random</LOCATION>
  <SERVER>A</SERVER>
  <SERVER>B</SERVER>
  <SERVER>C</SERVER>
  <SERVER>D</SERVER>
  <SERVER>E</SERVER>
  <SERVER>F</SERVER>
</HOUSE>

I'm using a ListBox that stores the SERVER items and I want add a function that removes a selected item from the listbox and the XML file. I've tried using:

doc.Element("HOUSE")
   .Element("SERVER")
   .Element(Serverslstbox.SelectedItem.ToString())
   .Remove();

and

XmlElement root = doc.DocumentElement;
        XmlNode remove= root.SelectSingleNode(Serverslstbox.SelectedItem.ToString());
        doc.ParentNode.RemoveChild(remove);

and many other options but none of them seem to work, any suggestions?

Answer 1

Assuming that Serverslstbox.SelectedItem contains the name of the server like "A", "B"...

Then you need to use Where to filter the elements by their value like this:

doc.Element("HOUSE")
    .Elements("SERVER")
    .Where(x => x.Value == Serverslstbox.SelectedItem.ToString())
    .Remove();

The above query will remove all "SERVER" elements inside the "HOUSE" element where the value equals the selected item value.

To save the result to a file use the Save method like this:

doc.Save(filename);