Open Source Extensible Enterprise n-tier Application Framework with Multilayered Architecture

using System;
using System.ComponentModel;
using System.IO;
using System.Web.UI.WebControls;
using SiberTek.Xenta.Utils;
using SiberTek.Xenta.Web.Controls;

namespace SiberTek.Xenta.Web.Admin.Modules
{
    public partial class ThemeDropDownList : UserControlBase, IDropDownList<String>
    {
        #region Events
        public event EventHandler SelectedIndexChanged;
        #endregion
     
        #region Properties
        public bool AutoPostBack
        {
            get
            {
                return lstThemeList.AutoPostBack;
            }
            set
            {
                lstThemeList.AutoPostBack = value;
            }
        }

        public bool AllowEmptyItem
        {
            get
            {
                return Convert.ToBoolean(ViewState["AllowEmptyItem"]);
            }
            set
            {
                ViewState["AllowEmptyItem"] = value;
            }
        }

        [Browsable(false)]
        public string SelectedValue
        {
            get
            {
                return lstThemeList.SelectedValue;
            }
            set
            {
                lstThemeList.SelectedValue = value;
            }
        }

        public int ItemCount
        {
            get
            {
                return lstThemeList.Items.Count;
            }
        }

        public bool Enabled
        {
            set
            {
                lstThemeList.Enabled = value;
            }
        }
        #endregion

        #region Methods
        public override void BindData()
        {
            try
            {
                string themesDir = PathHelper.MapPath("App_Themes");
                
                if(AllowEmptyItem)
                {
                    lstThemeList.Items.Add(new ListItem("-", String.Empty));
                }

                if(Directory.Exists(themesDir))
                {
                    foreach(string dirpath in Directory.GetDirectories(themesDir))
                    {
                        string dirname = Path.GetFileName(dirpath);

                        lstThemeList.Items.Add(new ListItem(dirname, dirname));
                    }
                }
                lstThemeList.DataBind();
            }
            catch(Exception ex)
            {
                Page.ShowMessage(ex.Message);
            }
            base.BindData();
        }
        #endregion

        #region Handlers
        protected void LstThemeList_OnSelectedIndexChanged(object sender, EventArgs e)
        {
            FireSelectedIndexChangedEvent();
        }
        #endregion

        #region Utilities
        private void FireSelectedIndexChangedEvent()
        {
            if(SelectedIndexChanged != null)
            {
                SelectedIndexChanged(this, EventArgs.Empty);
            }
        }
        #endregion
    }
}