Editing Multiple Nodes in a XML File - How?

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.

vb Code:

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

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.

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