XML element addition

[Alan T]

I used
XmlDocument to load from a file.

Then how do I append an element to the end?

<files>
<file>
<name>graphic.txt</name>
<location>c:\temp</location>
</file>
</files>

I want to add this:
<file>
<name>editor.exe</name>
<location>c:\executable</location>
</file>

[Morten Wennevik]

Hi Alan

The code below assumes xml contains the original xml data and will add anode under the files node
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);

XmlNode fileNode = doc.CreateNode(XmlNodeType.Element, "file", doc.NamespaceURI);
XmlNode nameNode = doc.CreateNode(XmlNodeType.Element, "name", doc.NamespaceURI);
XmlNode locationNode = doc.CreateNode(XmlNodeType.Element, "location",doc.NamespaceURI);

nameNode.InnerText = "editor.exe";
locationNode.InnerText = @"C:\executable";

fileNode.AppendChild(nameNode);
fileNode.AppendChild(locationNode);

doc["files"].AppendChild(fileNode);
If you have a separate method creating the xml nodes you can rewrite it to
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);

XmlNode node = doc["files"].AppendChild(CreateElement("file", "", doc));
node.AppendChild(CreateElement("name", "editor.exe", doc));
node.AppendChild(CreateElement("location", @"C:\executable", doc));

....

private XmlNode CreateElement(string name, string value, XmlDocument doc)
{
XmlNode node = doc.CreateNode(XmlNodeType.Element, name, doc.NamespaceURI);
node.InnerText = value;

return node;
}
The trick is to position yourself before adding any data to select a node you can do

XmlNode node = doc["files"];

or

XmlNode node = doc.SelectSingleNode("files");

The last way is useful if for instance you want to get all the file nodes

XmlNodeList list = doc.SelectNodes("files/file");

On Sun, 18 Feb 2007 12:54:13 +0100, Alan T <al*************@yahoo.com.auwrote:

I used
XmlDocument to load from a file.

Then how do I append an element to the end?

<files>
<file>
<name>graphic.txt</name>
<location>c:\temp</location>
</file>
</files>

I want to add this:
<file>
<name>editor.exe</name>
<location>c:\executable</location>
</file>

--
Happy coding!
Morten Wennevik [C# MVP]

[Alan T]

Thanks alot, it works very well.

"Morten Wennevik" <Mo************@hotmail.comwrote in message
news:op.tnx7maidklbvpo@stone...
Hi Alan

The code below assumes xml contains the original xml data and will add a
node under the files node
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);

XmlNode fileNode = doc.CreateNode(XmlNodeType.Element, "file",
doc.NamespaceURI);
XmlNode nameNode = doc.CreateNode(XmlNodeType.Element, "name",
doc.NamespaceURI);
XmlNode locationNode = doc.CreateNode(XmlNodeType.Element, "location",
doc.NamespaceURI);

nameNode.InnerText = "editor.exe";
locationNode.InnerText = @"C:\executable";

fileNode.AppendChild(nameNode);
fileNode.AppendChild(locationNode);

doc["files"].AppendChild(fileNode);
If you have a separate method creating the xml nodes you can rewrite it to
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);

XmlNode node = doc["files"].AppendChild(CreateElement("file", "", doc));
node.AppendChild(CreateElement("name", "editor.exe", doc));
node.AppendChild(CreateElement("location", @"C:\executable", doc));

....

private XmlNode CreateElement(string name, string value, XmlDocument doc)
{
XmlNode node = doc.CreateNode(XmlNodeType.Element, name, doc.NamespaceURI);
node.InnerText = value;

return node;
}
The trick is to position yourself before adding any data to select a node
you can do

XmlNode node = doc["files"];

or

XmlNode node = doc.SelectSingleNode("files");

The last way is useful if for instance you want to get all the file nodes

XmlNodeList list = doc.SelectNodes("files/file");

On Sun, 18 Feb 2007 12:54:13 +0100, Alan T <al*************@yahoo.com.au>
wrote:

I used
XmlDocument to load from a file.

Then how do I append an element to the end?

<files>
<file>
<name>graphic.txt</name>
<location>c:\temp</location>
</file>
</files>

I want to add this:
<file>
<name>editor.exe</name>
<location>c:\executable</location>
</file>

--
Happy coding!
Morten Wennevik [C# MVP]

[Jon Skeet [C# MVP]]

Morten Wennevik <Mo************@hotmail.comwrote:

The code below assumes xml contains the original xml data and will add a node under the files node
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);

XmlNode fileNode = doc.CreateNode(XmlNodeType.Element, "file", doc.NamespaceURI);
XmlNode nameNode = doc.CreateNode(XmlNodeType.Element, "name", doc.NamespaceURI);
XmlNode locationNode = doc.CreateNode(XmlNodeType.Element, "location", doc.NamespaceURI);

Any reason you'd use XmlDocument.CreateNode rather than XmlDocument.CreateElement?

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[Morten Wennevik [C# MVP]]

Probably because I didn't think of it :P
On Mon, 19 Feb 2007 08:58:30 +0100, Jon Skeet [C# MVP] <sk***@pobox.com>wrote:

Morten Wennevik <Mo************@hotmail.comwrote:

>The code below assumes xml contains the original xml data and will add a node under the files node
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);

XmlNode fileNode = doc.CreateNode(XmlNodeType.Element, "file", doc.NamespaceURI);
XmlNode nameNode = doc.CreateNode(XmlNodeType.Element, "name", doc.NamespaceURI);
XmlNode locationNode = doc.CreateNode(XmlNodeType.Element, "location", doc.NamespaceURI);

Any reason you'd use XmlDocument.CreateNode rather than XmlDocument.CreateElement?

--
Happy coding!
Morten Wennevik [C# MVP]