Check if XmlNode has childs

Question

0.00/5 (No votes)

See more:

I want to make a TreeNode by reading an Xml file. I mananged to create the ParentNodes(The Groups) but I want to add also users(the Xml child nodes) to these groups.

After running this code:

VB

Public Sub ReadGroup_Xml()
    GroupsList.Load(xml_path)

    Dim TreeNode2, TreeNode3 As TreeNode
    Dim names_list1 = GroupsList.GetElementsByTagName("Group_Name")
    Dim names_list2 = GroupsList.GetElementsByTagName("User_Initials")
    For Each item1 As XmlElement In names_list1
        'Here I add the parent nodes
        TreeNode2 = New TreeNode(item1.InnerText)
        MUsersFrm.TreeView1.Nodes.Add(TreeNode2)
        TreeNode2.ImageIndex = 0

        'Here I want to add the child nodes
        'What is the condition???
        For Each item2 As XmlElement In names_list2
            TreeNode3 = New TreeNode(item2.InnerText)
            TreeNode2.Nodes.Add(TreeNode3)
        Next
    Next
End Sub

I get the result:

Group Administrators
 - User am
Group Editors
 - User am
Group Guests
 - User am

The correct result should be:

Group Administrators
Group Editors
 - User am
Group Guests

...because only the Group Editors node contains childs nodes

I think that the commented text should have a condition before creating the child nodes.

Can you help me with this condition?

Posted 10-Oct-13 20:42pm

Alex Moiceanu

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

thanh_bkhn · Answer 1 · 2013-10-10T22:49:00

Solution 1

I think you could use

VB

If item1.HasChildNodes Then

to filter out the empty parent nodes.

Posted 10-Oct-13 22:49pm

thanh_bkhn

TnTinMn · Answer 2 · 2013-10-12T04:05:00

It would be helpful if you posted a sample of your xml file, but here is an example based on this xml.

XML

<?xml version="1.0" encoding="utf-8" ?>
<groups>
  <group Name="Administrators"></group>
  <group Name="Editors">
    <User_Initials>abc</User_Initials>
    <User_Initials>zyz</User_Initials>
  </group>
  <group Name="Guests"></group>
</groups>

VB

Dim doc As New Xml.XmlDocument
doc.Load("xmlfile1.xml")

Dim groups As Xml.XmlNodeList = doc.SelectNodes("./groups/group")

For Each grp As Xml.XmlElement In groups
   Dim node As TreeNode = TreeView1.Nodes.Add(grp.GetAttribute("Name"))
   For Each user As Xml.XmlNode In grp.SelectNodes("./User_Initials")
      node.Nodes.Add(user.InnerText)
   Next
Next