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Error reading certain lines of an XML

Posted on 2009-05-06
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194 Views
Last Modified: 2013-11-26
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
 
        XMLDoc.Load("c:\temp\update.xml")
 
        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
 
'Reads this XML:
 
<?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
 
        XMLDoc.Load("c:\temp\times.xml")
 
        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>

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0
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Question by:zerogeek
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12 Comments
 
LVL 8

Expert Comment

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

Author Comment

by:zerogeek
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

by:RyanAndres
ID: 24316852
Your nodes don't match..

<text>Another Test</test>

text and test. typo :]
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Author Comment

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

Author Comment

by:zerogeek
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

by:RyanAndres
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
 
XMLDoc.Load("file.txt")
 
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

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0
 

Author Comment

by:zerogeek
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>

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0
 

Author Comment

by:zerogeek
ID: 24317273
Their are multiple <status> tags in 1 XML file between the <statuses type="array"> and </statuses> tags
0
 
LVL 8

Accepted Solution

by:
RyanAndres earned 250 total points
ID: 24317310

Dim XMLDoc As New XmlDocument()
Dim nodeList As XmlNodeList
 
XMLDoc.Load("file.txt")
nodeList = XMLDoc.SelectNodes("statuses/status/text")
 
For Each node As XmlNode In nodeList
    Dim text As String = node.InnerText
Next

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0
 

Author Comment

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

Author Comment

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

Thanks for all your help. :)
0
 

Author Closing Comment

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

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