Generating menu from database according to user privilege

#region Namespaces
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
#endregion

public partial class Home : System.Web.UI.Page
{
    #region Page Load
    /// <summary>
    /// Loads the intial initial contents required for the page
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            DataTable menuData = null;
            try
            {
                menuData = new DataTable();
                menuData = GetMenuData();
                AddTopMenuItems(menuData);
            }
            catch (Exception ex)
            {
                Response.Write(ex.Message);
            }
            finally
            {
                menuData = null;
            }
        }
    }
    #endregion

    #region Function for getting data for menu
    /// <summary>
    /// Get's the data from database for menu
    /// </summary>
    /// <returns>Datatable of menu items</returns>
    private DataTable GetMenuData()
    {
        try
        {
            using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["MenuWithCustomPrivs"].ConnectionString))
            {
                SqlCommand cmd = new SqlCommand("spMenuItem", con);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@UserID", "K010");
                DataTable dtMenuItems = new DataTable();
                SqlDataAdapter sda = new SqlDataAdapter(cmd);
                sda.Fill(dtMenuItems);
                cmd.Dispose();
                sda.Dispose();
                return dtMenuItems;
            }
        }
        catch (Exception ex) {
            Response.Write(ex.Message);
        }
        return null;
    }
    #endregion

    #region Function for adding top menu items
    /// <summary>
    /// Adds the top/parent menu items for the menu
    /// </summary>
    /// <param name="menuData"></param>
    private void AddTopMenuItems(DataTable menuData)
    {
        DataView view = null;
        try
        {
            view = new DataView(menuData);
            view.RowFilter = "ParentID IS NULL";
            foreach (DataRowView row in view)
            {
                //Adding the menu item
                MenuItem newMenuItem = new MenuItem(row["Text"].ToString(), row["MenuID"].ToString());
                menuBar.Items.Add(newMenuItem);
                AddChildMenuItems(menuData, newMenuItem);
            }
        }
        catch (Exception ex)
        {
            Response.Write(ex.Message);
        }
        finally {
            view = null;
        }
    }
    #endregion

    #region Function for adding child menu items from database
    /// <summary>
    /// This code is used to recursively add child menu items by filtering by ParentID
    /// </summary>
    /// <param name="menuData"></param>
    /// <param name="parentMenuItem"></param>
    private void AddChildMenuItems(DataTable menuData, MenuItem parentMenuItem)
    {
        DataView view = null;
        try
        {
            view = new DataView(menuData);
            view.RowFilter = "ParentID=" + parentMenuItem.Value;
            foreach (DataRowView row in view)
            {
                MenuItem newMenuItem = new MenuItem(row["Text"].ToString(), row["MenuID"].ToString());
                newMenuItem.NavigateUrl = row["NavigateUrl"].ToString();
                parentMenuItem.ChildItems.Add(newMenuItem);
                
                AddChildMenuItems(menuData, newMenuItem);
            }
        }
        catch (Exception ex)
        {
            Response.Write(ex.Message);
        }
        finally
        {
            view = null;
        }
    }
    #endregion
}