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Add Data to XML Sub-Root via C#?

Posted on 2011-09-19
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Last Modified: 2012-05-12
Here's the XML tree. I need to add data to the "Links" node NOT the root.

<Settings>
    <Links>
    <Name>My Web Site</IpName>
    <Url>http://www.my.web.site.com/</IpUrl>
    </Links>
</Settings>

[Current code which alwayes writes to the Root]
 XmlDocument xmlDoc = new XmlDocument();
 xmlDoc.Load(file);
 XmlElement root = xmlDoc.DocumentElement;
 XmlElement ele = xmlDoc.CreateElement("Name");
 XmlText txt = xmlDoc.CreateTextNode(txtName.Text);
 root.AppendChild(ele);
 root.LastChild.AppendChild(txt);
 xmlDoc.Save(file);

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Question by:pointeman
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6 Comments
 
LVL 12

Expert Comment

by:geowrian
ID: 36564459
You need to retrieve the "Links" node and then append "ele" and "txt" to to that (instead of the root). Without seeing how you are finding the root node, I'm not sure what would work best for you. That said, if you do:

XmlElement LinksElement = root.SelectSingleNode("Links");
LinksElement.AppendChild(ele); // replaces root.AppendChild(ele);
LinksElement.LastChild.AppendChild(txt); // replaces root.LastChild.AppendChild(txt);
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Author Comment

by:pointeman
ID: 36566581
>>'finding root node'

A. XmlElement root = xmlDoc.DocumentElement; //default root of xml tree
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Expert Comment

by:geowrian
ID: 36567572
Thanks. Then the lines of code I gave above should do the trick.
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Author Comment

by:pointeman
ID: 36569020
Yes, now the xml file looks like this:

<Settings>
    <Links>
       <Name>My Web Site</Name>
       <Url>http://www.my.web.site.com/</Url>
       <Name>Another Web</Name>
       <Url>www.another.web.com/</Url>
    </Links>
</Settings>

New Problem, cannot  read xml file as before, here's code:

ds = new DataSet();
ds.ReadXml(file);

List<KeyValuePair<string, string>> links = new List<KeyValuePair<string, string>>();

foreach (DataRow row in ds.Tables["Links"].Rows)
{
      links.Add(new KeyValuePair<string, string>(row["Name"].ToString(), row["Url"].ToString()));
}
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Accepted Solution

by:
geowrian earned 500 total points
ID: 36569320
I think you want your XML to look like this instead:

<Settings>
    <Links>
       <Name>My Web Site</Name>
       <Url>http://www.my.web.site.com/</Url>
    </Links>
    <Links>
       <Name>Another Web</Name>
       <Url>www.another.web.com/</Url>
    </Links>
</Settings>

In that case, you need to generate a new Links element for record, then attach the Name and Url children to that.
0
 

Author Comment

by:pointeman
ID: 36569396
Yea, XML is not my forte. I would still like the new records to insert at a certain point in the xml file, not just simply appending. I would like a more orderly insert.
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