XPAth Searches in .NET 1

[tomandsandy]

I am trying to parse a DOM object in C#. I know the source of the failure but I do not know the reason for its failure.

I am searching for a tag called <mimeType>jpeg</mimeType> using:

XmlNode bookNode = xmldoc.SelectSingleNode("//mimeType");

//Determine whether a matching node is located.
if (!(bookNode == null))
{
System.Diagnostics.Debug.WriteLine("Located base64 Image Data");
System.Diagnostics.Debug.WriteLine bookNode.FirstChild.Value);
}

It works if
I manually edit the root element. The root element is returned from a web service and conatins an xmlns attribute:
<EDXLDistribution xmlns="urnasis:names:tc:emergency:EDXLE:1.0">

If I perform the Select SingleNode on the DOM with the xmlns it fails every time. if i remove the xmlns="urnasis:names:tc:emergency:EDXLE:1.0" attribute from the root element, the SelectSingleNode succeeds every time.

Why does this matter?

Thank You

Tom

 

[k5tm]

You need to use the XML namespace manager because XPath does not have the concept of default namespace.

I was able to Google this which shows you how to provide a set of namespaces to SelectSingleNode.

Tom Morrison

http://www.liant.com

 

[tsuji]

You've to declare it, something like this.
[tt] xmldoc.setProperty("SelectionNamespaces", "xmlns:x="urnasis:names:tc:emergency:EDXLE:1.0");[/tt]
With prefix x, you can search with the xpath.
[tt] XmlNode bookNode = xmldoc.SelectSingleNode("//x:mimeType");[/tt]

 

[tsuji]

Amendment
Should escape and match quotes! The corresponding line should read like this.
[tt] xmldoc.setProperty("SelectionNamespaces", "xmlns:x=[red]\[/red]"urnasis:names:tc:emergency:EDXLE:1.0[red]\"[/red]");[/tt]