Multiselect DropDown ListBox Control for Web Applications

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;


namespace MultiSelect_DropDown
{
    public partial class _Default : System.Web.UI.Page
    {
        
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
               InitialiseDropDownControls();
               LoadData();
            }
            //Hooking the selected index changed event.
            multiselect_Juices.OnMSDDSelectedIndexChanged += new Controls.MultiselectDropDownListBox.OnList_SelectedIndexChangedEventHandler(multiselect_Juices_OnMSDDSelectedIndexChanged);
           
        }

        private void InitialiseDropDownControls()
        { 
            // To set the background colors 
           // multiselect_foodItems.TextBoxBackColor = System.Drawing.Color.FromName("#FFFFE6");
           // multiselect_foodItems.DropDownBackColor = System.Drawing.Color.Aqua;
           
            // Set the height and width of dropdown controls
            multiselect_foodItems.Width = 160;
            multiselect_foodItems.Height = 15;
            // Adding "onclick" events to the items in the listbox.
            //multiselect_foodItems.AddAttribute("onclick", "alert('test');");
           
            multiselect_Juices.Width = 160;
            multiselect_Juices.Height= 15;
       

        }

        void multiselect_Juices_OnMSDDSelectedIndexChanged(object sender, EventArgs e)
        {
            if (this.multiselect_Juices.SelectedItems.Count > 0)
            {
                this.lblSelectedItem.BackColor = System.Drawing.Color.Aqua;
                this.lblSelectedItem.Text = this.multiselect_Juices.SelectedText;
            }
            else
            {
                this.lblSelectedItem.BackColor = System.Drawing.Color.Beige;
                this.lblSelectedItem.Text = "No Juice Selected";
            }
        }

        

        private void LoadData()
        {
            //Biniding the Dataset as the datasource
            multiselect_foodItems.DataSource = GetFoodItems().Tables[0];
            multiselect_foodItems.DataTextField = "FoodItems";
            multiselect_foodItems.DataBind();

            // Using the list item to add items
            multiselect_Juices.Items.Add("Apple");
            multiselect_Juices.Items.Add(new ListItem("Orange"));
            ListItem item = new ListItem("Grapes");
            multiselect_Juices.Items.Add(item);
            
        }

        void multiselect_Juices_OnList_SelectedIndexChanged(object sender, EventArgs e)
        {
            Response.Write(multiselect_Juices.SelectedItems.ToString());
            this.lblSelectedItem.Text = multiselect_Juices.SelectedText;
        }

        private DataSet GetFoodItems()
        {
            DataSet dsFoodItems = new DataSet();
            dsFoodItems.Tables.Add(new DataTable("tblFoodItems"));
            dsFoodItems.Tables[0].Columns.Add("FoodItems");
            dsFoodItems.Tables[0].Rows.Add("Orange");
            dsFoodItems.Tables[0].Rows.Add("Garlic bread");
            dsFoodItems.Tables[0].Rows.Add("Fruit Salad");
            dsFoodItems.Tables[0].Rows.Add("Pasta");
            dsFoodItems.Tables[0].Rows.Add("French Fries");
            dsFoodItems.Tables[0].Rows.Add("Veg Pizza");
            dsFoodItems.Tables[0].Rows.Add("Chicken Burger");
            dsFoodItems.Tables[0].Rows.Add("Veg Burger");
            dsFoodItems.Tables[0].Rows.Add("Chicken Nuggets");
            dsFoodItems.Tables[0].Rows.Add("French Fries");
            dsFoodItems.Tables[0].Rows.Add("Fruit Salad");
            dsFoodItems.Tables[0].Rows.Add("Pasta");
            dsFoodItems.Tables[0].Rows.Add("French Fries");
            dsFoodItems.Tables[0].Rows.Add("Fruit Salad");
            dsFoodItems.Tables[0].Rows.Add("Pasta");
            dsFoodItems.Tables[0].Rows.Add("French Fries");
            return dsFoodItems;
        }

        protected void multiselect_foodItems_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {

        }

        protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
        {
           
        }

      

    }
}