Adding new elements to XML (RSS) C#

Even though you have created a new element on the document you need to add it to a node for it to be added to the document.

The following snippet should get you started.

private void load_xml(string xml)
        {
            XmlDocument xDoc = new XmlDocument();
            xDoc.Load(Application.StartupPath + "\\RSS\\" + xml + ".xml");

            // find channel element to append to
            var channels = xDoc.GetElementsByTagName("channel", string.Empty);
            // if no channel tags then exit
            if (channels.Count==0)
                return;
            // create new item
            var newItem = xDoc.CreateElement("item");
            // add attributes (with value) 
            // Note: You do not have any attributes in your xml.
            // This is added to show you how to do it and what the effect is.
            newItem.SetAttribute("name", "NewItem");
            // create and add item sub tags
            var description = xDoc.CreateElement("description");
            description.InnerText = "NEW ITEM";
            newItem.AppendChild(description);
            // add new item to first channel
            channels[0].AppendChild(newItem);

            xDoc.Save(Application.StartupPath + "\\RSS\\" + xml + ".xml");
        }

Hmm I have modified my program and I think I am close to my target:

RSS:

<rss version="2.0">
	<channel>
 		<title>WCP Information channel</title>
 		<link>http://www.efukt.com</link>
		<description>WCP Informator</description>
	</channel>
</rss>

and my code C#

tring strFilename = Application.StartupPath + "\\RSS\\" + file;
                XmlDocument xmlDoc = new XmlDocument();

                if (File.Exists(strFilename))
                {
                    xmlDoc.Load(strFilename);

                    XmlElement elmXML = xmlDoc.CreateElement("item");
                    string strNewvideo = "<title>TEST</title>" +
                                         "<description>" + EngBox.Text + "</description>"
                                         +"<link>" + LinkBox.Text + "</link>";
                    elmXML.InnerXml = strNewvideo;
                    xmlDoc.DocumentElement.AppendChild(elmXML);
                    xmlDoc.Save(strFilename);
                }

but the result has one problem:

<?xml version="1.0"?>
<rss version="2.0">
  <channel>
    <title>WCP Information channel</title>
    <link>http://www.efukt.com</link>
    <description>WCP Informator</description>
  </channel>
  <item>
    <title>TEST</title>
    <description>Available</description>
    <link>adsdasads</link>
  </item>
</rss>

</channel> should be after before </rss> item...I dunno how to modify the code to move </channel> to the end of file.

like this:

?xml version="1.0"?>
<rss version="2.0">
  <channel>
    <title>WCP Information channel</title>
    <link>http://www.efukt.com</link>
    <description>WCP Informator</description>
  <item>
    <title>TEST</title>
    <description>Available</description>
    <link>adsdasads</link>
  </item>
</channel>
</rss>

You are appending to the root node of the document (in this case the rss element).
You need to append to the channel element; which you must find first.
Check my earlier post to see one way to do this.

The objects in System.Xml.Link namespace are a little easier to user than the System.Xml namespace objects.
You will need to add a reference to System.Xml.Link in you project reference.

private void load_xml2(string xml)
        {
            var xDoc = XDocument.Load(Application.StartupPath + "\\RSS\\" + xml + ".xml");

            // find channel element to append to (exit if not found)
            var channel = xDoc.Descendants("channel").ElementAt(0);
            if (channel == null)
                return;
            // create new item with sub tags
            var newItem = new XElement("item", 
                new XElement("title","New Item Title"),
                new XElement("description", "NEW ITEM"),
                new XElement("link", "Link to item"));
            // add new item to first channel
            channel.Add(newItem);
            
            xDoc.Save(Application.StartupPath + "\\RSS\\" + xml + "2.xml");
        }

Thank You mate, thats exactly what I was looking for :)
I owe you a beer :)