Solved

# Error reading certain lines of an XML

Posted on 2009-05-06
Medium Priority
198 Views
I am having an issue reading a node from certain XML files. Below is the code I use to read most XML files that my app needs. However this code seems to have an issue reading a certain file. I believe it is because of:
<statuses type="array">

Is there a way to read this XML file?
Dim xml As Object
Dim XMLDoc As New XmlDocument
Dim nodeList As XmlNodeList
Dim node As XmlNode

nodeList = XMLDoc.SelectSingleNode("/status/user").ChildNodes
For i As Integer = 0 To nodeList.Count - 2 Step 2
node = nodeList(i)
Dim user As String = node.InnerText
MessageBox.show(user)
Next

<?xml version="1.0" encoding="UTF-8"?>
<status>
<user>Testing</user>
</status>

'However the code below will not read the XML below.

Dim xml As Object
Dim XMLDoc As New XmlDocument
Dim nodeList As XmlNodeList
Dim node As XmlNode

nodeList = XMLDoc.SelectSingleNode("statuses/status/text").ChildNodes
For i As Integer = 0 To nodeList.Count - 2 Step 2
node = nodeList(i)
Dim text As String = node.InnerText
MessageBox.show(text)
Next

<?xml version="1.0" encoding="UTF-8"?>
<statuses type="array">
<status>
<text>Another Test</test>
</status>
</statuses>

0
Question by:zerogeek
• 8
• 4

LVL 8

Expert Comment

ID: 24316748
Please include the xml data that is failing.
0

Author Comment

ID: 24316796
It is listed under the code I am using to read the XML:

<?xml version="1.0" encoding="UTF-8"?>
<statuses type="array">
<status>
<text>Another Test</test>
</status>
</statuses>

It doesn't fail. It runs thru the code but never shows the messagebox.
MessageBox.show(text)
0

LVL 8

Expert Comment

ID: 24316852

<text>Another Test</test>

text and test. typo :]
0

Author Comment

ID: 24316903
Actually, I wrote that up really quick. It is an example of  the XML I am using.
0

Author Comment

ID: 24316925
I believe it has something to do with the code that reads the XML file. It seems to be getting hung up on the <statuses type="array"> and either skipping the entire XML or not getting deep enough into the nodes to read the innerText of <text>Another Test</text>
0

LVL 8

Expert Comment

ID: 24317133
The problem was your for loop.

The SelectSingleNode found the xpath just fine.

See below for changes.
Dim xml As Object = Nothing
Dim XMLDoc As New XmlDocument()
Dim nodeList As XmlNodeList
Dim node As XmlNode

nodeList = XMLDoc.SelectSingleNode("statuses/status/text").ChildNodes
For i As Integer = 0 To nodeList.Count - 1
node = nodeList(i)
Dim text As String = node.InnerText
MessageBox.show(text)
Next

0

Author Comment

ID: 24317256
That seems to be working. Is there a way to make this grab up to 10 more from the file? Example of XML below
<?xml version="1.0" encoding="UTF-8"?>
<statuses type="array">
<status>
<text>Testing</text>
</status>
<status>
<text>Number 2</text>
</status>
<status>
<text>And so on...</text>
</status>

0

Author Comment

ID: 24317273
Their are multiple <status> tags in 1 XML file between the <statuses type="array"> and </statuses> tags
0

LVL 8

Accepted Solution

RyanAndres earned 1000 total points
ID: 24317310

Dim XMLDoc As New XmlDocument()
Dim nodeList As XmlNodeList

nodeList = XMLDoc.SelectNodes("statuses/status/text")

For Each node As XmlNode In nodeList
Dim text As String = node.InnerText
Next

0

Author Comment

ID: 24317371
That did not work. It still only grabs the text from the first tag.
0

Author Comment

ID: 24317419
Nevermind. I didn't notice the change from XMLDoc.SelectSingleNode to SelectNodes

Thanks for all your help. :)
0

Author Closing Comment

ID: 31578522
Great help in a short amount of time. Much appreciated.
0

## Featured Post

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Parsing a CSV file is a task that we are confronted with regularly, and although there are a vast number of means to do this, as a newbie, the field can be confusing and the tools can seem complex. A simple solution to parsing a customized CSV fi…
The ECB site provides FX rates for major currencies since its inception in 1999 in the form of an XML feed. The files have the following format (reducted for brevity) (CODE) There are three files available HERE (http://www.ecb.europa.eu/stats/exch…
We’ve all felt that sense of false security before—locking down external access to a database or component and feeling like we’ve done all we need to do to secure company data. But that feeling is fleeting. Attacks these days can happen in many w…