Insert / delete ?

[Patrick]

Hi, im trying to first insert a node in the xml file and save it.

XmlDocument mDoc = new XmlDocument();
mDoc.Load("struct.xml");
XmlNode singleNode;
XmlNode newNode = mDoc.CreateNode(XmlNodeType.Element, "page", "");
XmlAttribute mAttr = mDoc.CreateAttribute("id");
singleNode = mDoc.SelectSingleNode("//page[@id=\"" + pageid.Value +
"\"]");

if (singleNode == null)
{
Response.Write("no node found");
return;
}
mAttr.Value = "100";
newNode.Attributes.Append(mAttr);

mDoc.DocumentElement.InsertAfter(newNode, singleNode);

i do find the node with ID number 3 and can retrive it contents, but i cant
insert a new node after it.
Here is the xml file:
<?xml version="1.0"?>
<home>
<page name="Test1" id="1">
<page name="Pagetest1" id="2" src="test1.htm"></page>
<page name="pagetest3" id="3" src="test2.htm"></page>
</page>
<page name="Test2" id="4" src="test1.htm">
<page name="Test23" id="7" src="test1.htm">
<page name="pagetest1" id="10" src="test1.htm"></page>
</page>
<page name="Pagetest1" id="5" src="test1.htm"></page>
<page name="pagetest2" id="6" src="test1.htm"></page>
</page>
</home>

The error message i am getting is:
Exception Details: System.ArgumentException: The reference node is not a
child of this node.

Source Error:

Line 67: newNode.Attributes.Append(mAttr);

Line 68:

Line 69: mDoc.DocumentElement.InsertAfter(newNode, singleNode);

Second question is, how do i delete a node ex. the node with ID nr 3? what
will happen if i delete node with id number 7?

-Patrick

[Martin Honnen]

Patrick wrote:

singleNode = mDoc.SelectSingleNode("//page[@id=\"" + pageid.Value +
"\"]");

if (singleNode == null)
{
Response.Write("no node found");
return;
}
mAttr.Value = "100";
newNode.Attributes.Append(mAttr);

mDoc.DocumentElement.InsertAfter(newNode, singleNode);

Use
singleNode.ParentNode.InsertAfter(newNode, singleNode);
You always have to call AppendChild or InsertAfter or InsertBefore on
the new parent node where you want to append or insert the new child.

--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

[Martin Honnen]

Patrick wrote:

Second question is, how do i delete a node ex. the node with ID nr 3? what
will happen if i delete node with id number 7?

Select the node using some DOM or XPath approach (e.g. SelectSingleNode)
then do
node.ParentNode.RemoveChild(node)

--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/