VB.NET: Linking Elements and Attributes....[Resolved]

[toytoy]

Say i have this XML tag...

<book section=”newspaper”>
    <new id=”100”>China News</new>
    <new id=”101”>Street paper</new>
    <new id=”0”>none</it>
    …….
    <new>….</new>
  </book>

I extract the element "China News" and "Street paper" and populate to the combobox....

Now if i select the "China News", how do i send the id which is "100" to the

server instead of china news...

Thanks

[Aaron Young]

Use .NET's XML classes to parse the XML and store both the Element value and attribute in a custom class which is loaded into the combobox, i.e.

Imports System.Xml
 
Public Class frmXMLExample
    Inherits System.Windows.Forms.Form
 
    Private Structure ComboItem
        Public Text As String
        Public Value As Object
 
        Public Sub New(ByVal itemText As String, ByVal itemValue As Object)
            Text = itemText
            Value = itemValue
        End Sub
 
        Public Overrides Function ToString() As String
            Return Text
        End Function
 
    End Structure
 
#Region " Windows Form Designer generated code "
 
    Public Sub New()
        MyBase.New()
 
        'This call is required by the Windows Form Designer.
        InitializeComponent()
 
        'Add any initialization after the InitializeComponent() call
 
    End Sub
 
    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub
 
    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer
 
    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents ComboBox1 As System.Windows.Forms.ComboBox
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.ComboBox1 = New System.Windows.Forms.ComboBox
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.SuspendLayout()
        '
        'ComboBox1
        '
        Me.ComboBox1.Location = New System.Drawing.Point(32, 32)
        Me.ComboBox1.Name = "ComboBox1"
        Me.ComboBox1.Size = New System.Drawing.Size(121, 21)
        Me.ComboBox1.TabIndex = 0
        Me.ComboBox1.Text = "ComboBox1"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(160, 32)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.TabIndex = 1
        Me.TextBox1.Text = "TextBox1"
        '
        'frmXMLExample
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 272)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.ComboBox1)
        Me.Name = "frmXMLExample"
        Me.Text = "frmXMLExample"
        Me.ResumeLayout(False)
 
    End Sub
 
#End Region
 
    Private Sub frmXMLExample_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim xmlDoc As New XmlDocument
        Dim nodes As XmlNodeList
        Dim node As XmlNode
        Dim xmlString As String
 
        xmlString = xmlString & "<XML>"
        xmlString = xmlString & "<book section='newspaper'>"
        xmlString = xmlString & "<new id='100'>China News</new>"
        xmlString = xmlString & "<new id='101'>Street Paper</new>"
        xmlString = xmlString & "<new id='0'>None</new>"
        xmlString = xmlString & "</book>"
        xmlString = xmlString & "</XML>"
 
        xmlDoc.LoadXml(xmlString)
        nodes = xmlDoc.DocumentElement.SelectNodes("book/new")
        For Each node In nodes
            ComboBox1.Items.Add(New ComboItem(node.InnerText, node.Attributes.GetNamedItem("id").InnerText))
        Next
    End Sub
 
    Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
        Dim item As ComboItem = ComboBox1.SelectedItem
        TextBox1.Text = item.Value
    End Sub
End Class

[toytoy]

i try a lot of time for listbox instead of combo box but cannot work..

what need to be change to work for listbox..

Or is there a better approach to solve it.


Thanks