using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml;
 
public partial class ListPicker : System.Web.UI.UserControl
{
    private XmlDocument _xmlDocument = new XmlDocument();
 
    public ListBox fromListBox
    {
        get
        {
            return lstFrom;
        }
    }
 
    public ListBox toListBox
    {
        get
        {
            return lstTo;
        }
    }
 
    private void PopulateListBox(ListBox listBox)
    {
        listBox.Items.Clear();
        XmlNodeList nodes = _xmlDocument.SelectNodes("listboxes/" + listBox.ClientID + "/option");
        foreach (XmlNode node in nodes)
        {
            listBox.Items.Add(new ListItem(node["key"].InnerText, node["value"].InnerText));
        }
    }
 
    private void PopulateListBoxes()
    {        
        _xmlDocument.LoadXml(HttpUtility.UrlDecode(hdnDropdowns.Value));
        PopulateListBox(lstFrom);
        PopulateListBox(lstTo);
    }
 
    protected void Page_Load(object sender, EventArgs e)
    {
        Page.ClientScript.RegisterClientScriptInclude("listboxjs", Page.TemplateSourceDirectory + "/js/listbox.js");
 
        if (!IsPostBack)
        {
            String movejs = "move('{0}','{1}','{2}')";
            String unselectjs = "unselect('{0}')";
            lstFrom.Attributes["onclick"] = String.Format(unselectjs, lstTo.ClientID);
            lstTo.Attributes["onclick"] = String.Format(unselectjs, lstFrom.ClientID);
            btnTo.Attributes["onclick"] = String.Format(movejs, lstFrom.ClientID, lstTo.ClientID, hdnDropdowns.ClientID);
            btnFrom.Attributes["onclick"] = String.Format(movejs, lstTo.ClientID, lstFrom.ClientID, hdnDropdowns.ClientID);
        }
        else
        {
            if (!(String.IsNullOrEmpty(hdnDropdowns.Value)))
            {
                PopulateListBoxes();
            }
        }
    }
}
 

 
Imports System.Xml
 
Partial Class ListPicker
    Inherits System.Web.UI.UserControl
 
    Private _xmlDocument As New XmlDocument()
 
    Public ReadOnly Property fromListBox() As ListBox
        Get
            Return lstFrom
        End Get
    End Property
 
    Public ReadOnly Property toListBox() As ListBox
        Get
            Return lstTo
        End Get
    End Property
 
    Private Sub PopulateListBox(ByVal lstBox As ListBox)
        lstBox.Items.Clear()
        Dim nodes As XmlNodeList = _xmlDocument.SelectNodes("listboxes/" + lstBox.ClientID + "/option")
        For Each node As XmlNode In nodes
            lstBox.Items.Add(New ListItem(node.Item("key").InnerText, node.Item("value").InnerText))
        Next
    End Sub
 
    Private Sub PopulateListBoxes()
        _xmlDocument.LoadXml(HttpUtility.UrlDecode(hdnDropdowns.Value))
        PopulateListBox(lstFrom)
        PopulateListBox(lstTo)
    End Sub
 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Page.ClientScript.RegisterClientScriptInclude("listboxjs", Page.TemplateSourceDirectory & "/js/listbox.js")
 
        If Not IsPostBack Then
            Dim movejs As String = "move('{0}','{1}','{2}')"
            Dim unselectjs As String = "unselect('{0}')"
 
            lstFrom.Attributes("onclick") = String.Format(unselectjs, lstTo.ClientID)
            lstTo.Attributes("onclick") = String.Format(unselectjs, lstFrom.ClientID)
            btnTo.Attributes("onclick") = String.Format(movejs, lstFrom.ClientID, lstTo.ClientID, hdnDropdowns.ClientID)
            btnFrom.Attributes("onclick") = String.Format(movejs, lstTo.ClientID, lstFrom.ClientID, hdnDropdowns.ClientID)
        Else
            If Not String.IsNullOrEmpty(hdnDropdowns.Value) Then
                PopulateListBoxes()
            End If
        End If
    End Sub
End Class
 

 
<?php
 
require_once("controls.php");
require_once("listbox.php");
 
class listpicker extends controls
{
    var $lstFrom;
    var $lstTo;
    var $deserializable;
 
    function listpicker($id)
    {
        $this->attributes['id'] = $id;
        $this->lstFrom = new listbox($id.'_lstFrom');
        $this->lstFrom->attributes['style'] = 'width:200px';
        $this->lstFrom->attributes['onclick'] = "unselect('".$id."_lstTo')";	
        $this->lstTo = new listbox($id.'_lstTo');
        $this->lstTo->attributes['style'] = 'width:200px';
        $this->lstTo->attributes['onclick'] = "unselect('".$id."_lstFrom')";
 
        if ($_REQUEST[$id.'$hdnDropdowns'])
        {
            $this->deserializable = true;
            $this->xml(urldecode($_REQUEST[$id.'$hdnDropdowns']));			
        }	
    }
 
    function render()
    {	
    $id = $this->attributes['id'];
    $html='<table>
                <tr>
                    <td>'
                        .$this->lstFrom->render().
                    '</td>
                    <td>
                        <input id="btnTo" type="button" value=">>" onclick="move(\''.$id.'_lstFrom\',\''.$id.'_lstTo\',\''.$id.'_hdnDropdowns\')" />
                            <br />
                        <input id="btnFrom" type="button" value="<<" onclick="move(\''.$id.'_lstTo\',\''.$id.'_lstFrom\',\''.$id.'_hdnDropdowns\')" />
                    </td>
                    <td>'		
                        .$this->lstTo->render().
                    '</td>
                </tr>
            </table>
	        <input type="hidden" ID="'.$id.'_hdnDropdowns" name="'.$id.'$hdnDropdowns" />';		
    return $html;
    }
 
    function xml($text) 
    {		
        $id = $this->attributes['id'];
        $parser = xml_parser_create();
        xml_parse_into_struct($parser, $text, $vals);
        xml_parser_free($parser);
        $tag = "";
 
        for($i = 0; $i < count($vals); $i++)
        {	
            switch($vals[$i]['tag'])
            {
                case strtoupper($id.'_lstFrom') : $tag = "lstFrom";	break;
                case strtoupper($id.'_lstTo') : $tag = "lstTo";	break;
            }
 
            if (($tag) && ($vals[$i]['tag'] == "KEY"))
            {
                $this->{$tag}->addItem($vals[$i]['value'], $vals[$i+1]['value']);					
            }
        }
    }
}
 
?>