Solved

Loop through XML file and read nodes

Posted on 2008-10-16
4
952 Views
Last Modified: 2012-05-05
need to loop through and XML file, and grab node vales ...

<users>
<user>
<name>Joe</name>
<oldfolderlocation> C:\oldfolder\ Joe </oldfolderlocation>
<newfolderlocation> C:\newfolder\ Joe </ newfolderlocation >
</ user >
< user >
<name>Tom</name>
<oldfolderlocation> C:\oldfolder\ Tom </oldfolderlocation>
<newfolderlocation> C:\newfolder\ Tom </ newfolderlocation >
</user>

</users>

Dim userNodes As XmlNodeList = doc.SelectNodes("people/ person")
 For Each userNodesNode As XmlNode In userNodes
My.Computer.FileSystem.CopyDirectory(userNodesNode("newfolderlocation ").InnerText, userNodesNode("oldfolderlocation").InnerText, False)

     Next
0
Comment
Question by:gvilla23
  • 2
4 Comments
 
LVL 8

Expert Comment

by:rlh68
ID: 22737303

Not sure if it's ee or you xml but, make sure your xml doesn't have spaces in the elements tags, some of them did when I copied your xml to my code. The xmlDocument object may give you errors if your xml is not well formed.

i.e. this
 < user >
should be this
<user>
        Dim xDoc As New Xml.XmlDocument
        Dim xml As String
 
        xml = "<users><user><name>Joe</name><oldfolderlocation>C:\oldfolder\Joe</oldfolderlocation>" & _
           "<newfolderlocation>C:\newfolder\Joe</newfolderlocation></user><user><name>Tom</name>" & _
             "<oldfolderlocation>C:\oldfolder\Tom</oldfolderlocation><newfolderlocation>C:\newfolder\Tom</newfolderlocation></user></users>"
 
        xDoc.LoadXml(xml)
 
        Dim nl As Xml.XmlNodeList
        ' fill node list with users node
 
        nl = xDoc.GetElementsByTagName("users")
        ' loop each users
        For Each nUser As Xml.XmlNode In nl
            '' check for snippetIndex value we want to match
            'If n.SelectSingleNode("snippetIndex").InnerText = "0" Then
            '    ' show snippetName
            '    MessageBox.Show(n.SelectSingleNode("snippetName").InnerText)
            'End If
 
            Dim nName As Xml.XmlNode = nUser.SelectSingleNode("user/name")
            Dim nNewFolderLoc As Xml.XmlNode = nUser.SelectSingleNode("user/newfolderlocation")
            Dim nOldFolderLoc As Xml.XmlNode = nUser.SelectSingleNode("user/oldfolderlocation")
 
            MessageBox.Show(nName.InnerText & " | " & nNewFolderLoc.InnerText & " | " & nOldFolderLoc.InnerText)
 
        Next

Open in new window

0
 
LVL 8

Expert Comment

by:rlh68
ID: 22737309

oops, disregard the commented out code, it was from the original code that I used to write your example. I meant to delete it but forgot to.

Garbage code:
            '' check for snippetIndex value we want to match
            'If n.SelectSingleNode("snippetIndex").InnerText = "0" Then
            '    ' show snippetName
            '    MessageBox.Show(n.SelectSingleNode("snippetName").InnerText)
            'End If
0
 
LVL 19

Accepted Solution

by:
drichards earned 50 total points
ID: 22737983
If you are using the XML document for other purposes or if the document is small, the XmlDocument solution is fine.  If the document is large or performance is a concern then you will be better served by an XmlReader.

There are a number of approaches you could take with a reader, and I have included one here.  It's reasonably robust against XML comments and element whitespace.  It advances to each user node and then reads the name, oldfolderlocation, and newfolderlocation text elements.
        Dim rdr As XmlReader = XmlReader.Create(<xml file or stream>)
        While rdr.ReadToFollowing("user")
            rdr.ReadToFollowing("name")
            rdr.Read()
            Dim name As String = rdr.Value
            rdr.ReadToFollowing("oldfolderlocation")
            rdr.Read()
            Dim oldFolder As String = rdr.Value().Trim()
            rdr.ReadToFollowing("newfolderlocation")
            rdr.Read()
            Dim newFolder As String = rdr.Value().Trim()
            ' Do Copy here...
        End While

Open in new window

0
 

Author Closing Comment

by:gvilla23
ID: 31506981
Thank you very much for the explanation.
0

Featured Post

ScreenConnect 6.0 Free Trial

At ScreenConnect, partner feedback doesn't fall on deaf ears. We collected partner suggestions off of their virtual wish list and transformed them into one game-changing release: ScreenConnect 6.0. Explore all of the extras and enhancements for yourself!

Question has a verified solution.

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

Suggested Solutions

Introduction As chip makers focus on adding processor cores over increasing clock speed, developers need to utilize the features of modern CPUs.  One of the ways we can do this is by implementing parallel algorithms in our software.   One recent…
Creating an analog clock UserControl seems fairly straight forward.  It is, after all, essentially just a circle with several lines in it!  Two common approaches for rendering an analog clock typically involve either manually calculating points with…
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question