App_Code/Providers/CustomRoleProvider.cs

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//===============================================================================================
//
// (c) Copyright Microsoft Corporation.
// This source is subject to the Microsoft Permissive License.
// See http://www.microsoft.com/resources/sharedsource/licensingbasics/sharedsourcelicenses.mspx.
// All other rights reserved.
//
//===============================================================================================

using System;
using System.IO;
using System.Configuration.Provider;
using System.Collections.Generic;
using System.Web;
using System.Web.Security;
using System.Xml.Serialization;

namespace MyWebPagesStarterKit.Providers
{
    /// <summary>
    /// Specialized RoleProvider that uses a file (Roles.config) to store its data.
    /// </summary>
    public class CustomRoleProvider : RoleProvider
    {
        private String rolesfile;
        private const string _cProviderName = "CustomRoleProvider";
        private const string _cRolesFilename = "Roles.config";

        private string _applicationName;
        private List<RoleData> _roles;
        
        public CustomRoleProvider() 
        {
            rolesfile = HttpContext.Current.Server.MapPath(string.Format("~/App_Data/{0}", _cRolesFilename));
        }

        public override void Initialize(string name, System.Collections.Specialized.NameValueCollection config)
        {

            if (!WebSite.GetInstance().ReadyToUse)
                throw new WebsiteNotReadyException("This website is not yet ready to use. Please verify that all required file/folders exist.");
                
            if (config == null)
                throw new ArgumentNullException("config");

            name = _cProviderName;

            if (String.IsNullOrEmpty(config["description"]))
            {
                config.Remove("description");
                config.Add("description", "Xml membership provider");
            }

            // Initialize the abstract base class.
            base.Initialize(name, config);

            _applicationName = getConfigValue(config["applicationName"], System.Web.Hosting.HostingEnvironment.ApplicationVirtualPath);

            //load/create the rolesfile
            if (File.Exists(rolesfile))