setting an XmlElement its prefix.

[BramVandenbon]

Hi,

I would like to add an XmlElement that looks like this:
<data:lvalue-possibles>

Here is my current code.

XmlDocument root = new XmlDocument();
XmlNode attr = root.ImportNode(base.Xml,true);
root.AppendChild(attr);

XmlElement possibles = root.CreateElement("data:lvalue-possibles");
possibles.Prefix = "data";
attr.AppendChild(possibles);
return attr;//returns the XmlNode

This code is part of a function which returns an XMLNode. It also overrides a function of another class. It takes the XMLNode returned by that baseclass function and just adds the new tag.

Here's some explanations of the code above:
1) To create an XmlElement there is always an XmlDocument needed. So first I create the XmlDocument.

XmlDocument root = new XmlDocument();

2) As I said earlier the function overrides another function. First we'll need to convert the tags of the basefunction to the newly created document.

XmlNode attr = root.ImportNode(base.Xml,true);

3) Here we make those tags the root of our document.

root.AppendChild(attr);

4) Next we create the new XMLElement.

XmlElement possibles = root.CreateElement("data:lvalue-possibles");

5) I am trying really hard to set the prefix to "data:...".

possibles.Prefix = "data";

6) After that the new element is added to the previous one.

attr.AppendChild(possibles);

I have no idea why, but this does not work. Everything works fine that is, except the prefix. No matter what I try the prefix does not show up. The output is this:

<baseclasstags>
<lvalue-possibles />
</baseclasstags>

When I debug I can see that even right after the 4th step there is no prefix in the InnerXML property. So it looks like it was never added.

Does anybody know how I can set the prefix anyway?

[BramVandenbon]

I read somewhere that I need to add a namespacemanager. Tried it but made no difference:

XmlNamespaceManager n = new XmlNamespaceManager(root.NameTable);
n.AddNamespace("data", "http://lamp.cfar.umd.edu/viperdata");

[penagate]

The prefix is called a namespace. In the W3C DOM you use the createElementNS() method to add an element using a qualified namespace. In the .NET class it is implemented using an overload of CreateElement.

http://msdn2.microsoft.com/en-us/lib...teelement.aspx

XmlElement possibles = root.CreateElement(
  "lvalue-possibles",
  "data",
  "http://lamp.cfar.umd.edu/viperdata"
);

[BramVandenbon]

Thank you seems like it did indeed work like that !