Editing Multiple Nodes in a XML File - How?

[Wesley008]

Alright, I decided instead of Serialization or Access, I'm going be using XML files.

Now, I have them properly adding and editing, but I see theirs a property .SelectNodes( )

How do I use this ? I did a quick Google Search, couldn't find much. Here's the current Code I'm using to Edit my Document.

Public Sub EditClasses()
        With frmClassEdit
            Dim xmlDoc As New XmlDocument
            xmlDoc.Load(Application.StartupPath & "\Data\" & .cmbClassSelection.SelectedItem.ToString & ".xml")
 
            Dim xmlnod As XmlNode
            xmlnod = xmlDoc.DocumentElement.SelectSingleNode("Classes/ClassName")
            xmlnod.InnerText = .txtClassName.Text
            xmlnod = xmlDoc.DocumentElement.SelectSingleNode("Classes/ClassCode")
            xmlnod.InnerText = .txtClassCode.Text
            xmlnod = xmlDoc.DocumentElement.SelectSingleNode("Classes/ClassRoom")
            xmlnod.InnerText = .txtClassRoom.Text
            xmlnod = xmlDoc.DocumentElement.SelectSingleNode("Classes/Grade")
            xmlnod.InnerText = .numGrade.Value
 
            xmlDoc.Save(Application.StartupPath & "\Data\" & .txtClassCode.Text & ".xml")
            xmlDoc.RemoveAll()
        End With
    End Sub

[ForumAccount]

You make a string query and it will select nodes matching your criteria and return a System.Xml.XmlNodeList as illustrated here:

SelectNodes XPath Queries

One function is you can mass update stuff based on parameters you define.

[gep13]

Hey,

Both SelectNodes and SelectSingleNode accept an XPath Query which identifies which node, or collection of nodes that you want to isolate.

There are a number of posts in this forum that discuss this, and you can check the link in my signature for more details on XPath.

Hope that helps!!

Gary