How do I delete an element?

I am trying to delete an element and it's children based on an ID that is passed in. I am getting an error. Can someone tell me what is wrong here? Thanks

<Root>
<Element>
<ID>1</ID>
<Name>Personnel</Name>
</Element>
<Element>
<ID>2</ID>
<Name>Sales xxx</Name>
</Element>
<Element>
<ID>3</ID>
<Name>Warehouse z</Name>
</Element>
</Root>

ElementID = Me.txtID.Text

Dim doc = New XmlDocument

doc.Load(Server.MapPath(viewstate("xml_path")))

Dim targetNode As XmlNode = doc.SelectSingleNode("/Element")
Dim nodeList As XmlNodeList = targetNode.SelectNodes(("[@ID=""" + ElementID.ToString() + """]"))

Dim node As XmlNode
For Each node In nodeList
targetNode.RemoveChild(node)
Next
doc.Save(viewstate("xml_path"))


I get an error here:

Dim nodeList As XmlNodeList = targetNode.SelectNodes(("[@ID=""" + ElementID.ToString() + """]"))
Object reference not set to an instance of an object.

this statement:
Dim targetNode As XmlNode = doc.SelectSingleNode("/Element")
is going to select the first element node. Now the target node would be this:

After that it looks like you are trying to grab the attribute ID. (that's what @ID is) but you dont' have any attributes with that name. What you should do is just select the elementNode that has the childNode ID = whatever id your searching. Which would be this



Hope that helps.