arraylist..or..hashtable...how to....

[moipoimonpon]

I have the following information

continent | country | Placeof interest

Asia | India |agra,mumbai,delhi
asia | china |beijing,shangai,shen zhen
asia | mongolia | ulan bator
North america | USA | new york,losangeles,boston
north america | canada | ottowa,toronto
south america | brazil | sao palo,rio de janiro
south america | argentina | comodoro,beusnoair

i want to create an aspx page that would read the data from my
collection object and populate the dropdowns

dropdown 1 - continent

dropdown 2 - country

dropdown 3 - places of interest

so if i change asia,it should show india,china,mongolia ..in the second dropdown..if i select
india then ythe 3rd dropdown should show all the places in india
alone.
thanx in advance!!

[vijaydiwakar]

I have the following information

continent | country | Placeof interest

Asia | India |agra,mumbai,delhi
asia | china |beijing,shangai,shen zhen
asia | mongolia | ulan bator
North america | USA | new york,losangeles,boston
north america | canada | ottowa,toronto
south america | brazil | sao palo,rio de janiro
south america | argentina | comodoro,beusnoair

i want to create an aspx page that would read the data from my
collection object and populate the dropdowns

dropdown 1 - continent

dropdown 2 - country

dropdown 3 - places of interest

so if i change asia,it should show india,china,mongolia ..in the second dropdown..if i select
india then ythe 3rd dropdown should show all the places in india
alone.
thanx in advance!!

i'll defenetly solve thy prob but just give me some time

[AricC]

I have the following information

continent | country | Placeof interest

Asia | India |agra,mumbai,delhi
asia | china |beijing,shangai,shen zhen
asia | mongolia | ulan bator
North america | USA | new york,losangeles,boston
north america | canada | ottowa,toronto
south america | brazil | sao palo,rio de janiro
south america | argentina | comodoro,beusnoair

i want to create an aspx page that would read the data from my
collection object and populate the dropdowns

dropdown 1 - continent

dropdown 2 - country

dropdown 3 - places of interest

so if i change asia,it should show india,china,mongolia ..in the second dropdown..if i select
india then ythe 3rd dropdown should show all the places in india
alone.
thanx in advance!!

You want linked combo boxes dependent on selection? Where is the data coming from? You need to at least make an attempt at the code. Please post what you have so far.

[vijaydiwakar]

I have the following information

continent | country | Placeof interest

Asia | India |agra,mumbai,delhi
asia | china |beijing,shangai,shen zhen
asia | mongolia | ulan bator
North america | USA | new york,losangeles,boston
north america | canada | ottowa,toronto
south america | brazil | sao palo,rio de janiro
south america | argentina | comodoro,beusnoair

i want to create an aspx page that would read the data from my
collection object and populate the dropdowns

dropdown 1 - continent

dropdown 2 - country

dropdown 3 - places of interest

so if i change asia,it should show india,china,mongolia ..in the second dropdown..if i select
india then ythe 3rd dropdown should show all the places in india
alone.
thanx in advance!!

Yeh......!
I'm with the solution right now
u've to use xmlfiles for that
as

 
 
Imports System.Xml
' Place 3 comboboxes rename them as
' cmbContinantal,cmbCountry,cmbPlaces
Public Class Form1
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        CreateXml()
    End Sub
    Private Sub CreateXml()
        Dim myXml As New XmlTextWriter("c:\myxml.xml", System.Text.Encoding.UTF8)
        With myXml
            .Formatting = Formatting.Indented
            .WriteStartElement("myXml")
 
            ' any how 0 must not be changes u may increase upto n no. 
            'but do not increase that 0
            .WriteStartElement("Continant")
            .WriteAttributeString("Count01", "Asia")
            .WriteAttributeString("Count02", "Africa")
            .WriteEndElement()
 
            .WriteStartElement("Country")
            .WriteAttributeString("Asia01", "India")
            .WriteAttributeString("Asia02", "China")
            .WriteAttributeString("Africa01", "SA")
            .WriteAttributeString("Africa02", "WI")
            .WriteEndElement()
 
            .WriteStartElement("Places")
            .WriteAttributeString("India", "Mumbai|Delhi|Nagpur")
            .WriteAttributeString("China", "beging|China2|China3")
            .WriteAttributeString("SA", "sa1|sa2|sa3")
            .WriteAttributeString("WI", "wi1|wi2|wi3")
 
            .WriteEndElement()
            .Flush()
            .Close()
        End With
    End Sub
 
    Private Sub cmbContinantal_DropDown(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmbContinantal.DropDown
        SetCombosAsPer("Continant")
    End Sub
 
    Private Sub cmbContinantal_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmbContinantal.SelectedIndexChanged
        SetCombosAsPer("Country")
    End Sub
    Private Sub SetCombosAsPer(ByVal sCondition$)
        Dim Doc As New XmlDocument
        Doc.Load("C:\myxml.xml")
        Dim myNodelist As XmlNodeList
        myNodelist = Doc.GetElementsByTagName(sCondition)
        Dim myNode As XmlNode
        For Each myNode In myNodelist
            Select Case myNode.Name
                Case "Continant"
                    cmbContinantal.Items.Clear()
                    For i As Int16 = 0 To myNode.Attributes.Count - 1
                        cmbContinantal.Items.Add(myNode.Attributes(i).Value)
                    Next
                Case "Country"
                    cmbCountry.Items.Clear()
 
                    For i As Int16 = 0 To myNode.Attributes.Count - 1
                        ' here 0 is concanated to avoid error.
                        'If u think how then go 3 step later and think
                        If myNode.Attributes(i).Name.Substring(0, InStr(myNode.Attributes(i).Name, "0")) = cmbContinantal.Text & "0" Then
                            cmbCountry.Items.Add(myNode.Attributes(i).Value)
                        End If
                    Next
                Case "Places"
                    cmbPlaces.Items.Clear()
                    Dim myCities() As String
                    For i As Int16 = 0 To myNode.Attributes.Count - 1
                        If myNode.Attributes(i).Name = cmbCountry.Text Then
                            myCities = myNode.Attributes(i).Value.ToString.Split("|")
                            For j As Int16 = 0 To UBound(myCities)
                                cmbPlaces.Items.Add(myCities(j))
                            Next
                        End If
                    Next
            End Select
        Next
    End Sub
 
    Private Sub cmbCountry_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmbCountry.SelectedIndexChanged
        SetCombosAsPer("Places")
    End Sub
End Class
 
 

try it