RoleService.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / xsp / System / Web / Extensions / ApplicationServices / RoleService.cs / 1 / RoleService.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.ApplicationServices { 
    using System; 
    using System.Diagnostics.CodeAnalysis;
    using System.ServiceModel; 
    using System.ServiceModel.Activation;
    using System.ServiceModel.Configuration;
    using System.Runtime.Serialization;
    using System.Web; 
    using System.Web.Security;
    using System.Web.Configuration; 
    using System.Web.Management; 
    using System.Web.Resources;
    using System.Security.Principal; 
    using System.Web.Hosting;
    using System.Threading;
    using System.Configuration.Provider;
    using System.Security.Permissions; 

    [ 
    AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Required), 
    AspNetHostingPermission(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal),
    AspNetHostingPermission(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal), 
    ServiceContract(Namespace = "http://asp.net/ApplicationServices/v200"),
    ServiceBehavior(Namespace="http://asp.net/ApplicationServices/v200", InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)
    ]
    public class RoleService { 
        private static object _selectingProviderEventHandlerLock = new object();
        private static EventHandler _selectingProvider; 
 
        public static event EventHandler SelectingProvider {
            add { 
                lock (_selectingProviderEventHandlerLock) {
                    _selectingProvider += value;
                }
            } 
            remove {
                lock (_selectingProviderEventHandlerLock) { 
                    _selectingProvider -= value; 
                }
            } 
        }

        private static void EnsureProviderEnabled() {
            if (!Roles.Enabled) { 
                throw new ProviderException(AtlasWeb.RoleService_RolesFeatureNotEnabled);
            } 
        } 

        private RoleProvider GetRoleProvider(IPrincipal user) { 
            string providerName = Roles.Provider.Name;
            SelectingProviderEventArgs args = new SelectingProviderEventArgs(user, providerName);
            OnSelectingProvider(args);
            providerName = args.ProviderName; 
            RoleProvider provider = Roles.Providers[providerName];
            if (provider == null) { 
                throw new ProviderException(AtlasWeb.RoleService_RoleProviderNotFound); 
            }
            return provider; 
        }

        [OperationContract]
        public string[] GetRolesForCurrentUser() { 
            try {
                ApplicationServiceHelper.EnsureRoleServiceEnabled(); 
                EnsureProviderEnabled(); 

                IPrincipal user = ApplicationServiceHelper.GetCurrentUser(HttpContext.Current); 
                string username = ApplicationServiceHelper.GetUserName(user);
                RoleProvider provider = GetRoleProvider(user);

                return provider.GetRolesForUser(username); 
            }
            catch (Exception e) { 
                LogException(e); 
                throw;
            } 
        }

        [OperationContract]
        public bool IsCurrentUserInRole(string role) { 
            if (role == null) {
                throw new ArgumentNullException("role"); 
            } 

            try { 
                ApplicationServiceHelper.EnsureRoleServiceEnabled();
                EnsureProviderEnabled();

                IPrincipal user = ApplicationServiceHelper.GetCurrentUser(HttpContext.Current); 
                string username = ApplicationServiceHelper.GetUserName(user);
                RoleProvider provider = GetRoleProvider(user); 
 
                return provider.IsUserInRole(username, role);
            } 
            catch (Exception e) {
                LogException(e);
                throw;
            } 
        }
 
        private void LogException(Exception e) { 
            WebServiceErrorEvent errorevent = new WebServiceErrorEvent(AtlasWeb.UnhandledExceptionEventLogMessage, this, e);
            errorevent.Raise(); 
        }

        private void OnSelectingProvider(SelectingProviderEventArgs e) {
            EventHandler handler = _selectingProvider; 
            if (handler != null) {
                handler(this, e); 
            } 
        }
 
        //hiding public constructor
        internal RoleService() {
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.ApplicationServices { 
    using System; 
    using System.Diagnostics.CodeAnalysis;
    using System.ServiceModel; 
    using System.ServiceModel.Activation;
    using System.ServiceModel.Configuration;
    using System.Runtime.Serialization;
    using System.Web; 
    using System.Web.Security;
    using System.Web.Configuration; 
    using System.Web.Management; 
    using System.Web.Resources;
    using System.Security.Principal; 
    using System.Web.Hosting;
    using System.Threading;
    using System.Configuration.Provider;
    using System.Security.Permissions; 

    [ 
    AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Required), 
    AspNetHostingPermission(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal),
    AspNetHostingPermission(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal), 
    ServiceContract(Namespace = "http://asp.net/ApplicationServices/v200"),
    ServiceBehavior(Namespace="http://asp.net/ApplicationServices/v200", InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)
    ]
    public class RoleService { 
        private static object _selectingProviderEventHandlerLock = new object();
        private static EventHandler _selectingProvider; 
 
        public static event EventHandler SelectingProvider {
            add { 
                lock (_selectingProviderEventHandlerLock) {
                    _selectingProvider += value;
                }
            } 
            remove {
                lock (_selectingProviderEventHandlerLock) { 
                    _selectingProvider -= value; 
                }
            } 
        }

        private static void EnsureProviderEnabled() {
            if (!Roles.Enabled) { 
                throw new ProviderException(AtlasWeb.RoleService_RolesFeatureNotEnabled);
            } 
        } 

        private RoleProvider GetRoleProvider(IPrincipal user) { 
            string providerName = Roles.Provider.Name;
            SelectingProviderEventArgs args = new SelectingProviderEventArgs(user, providerName);
            OnSelectingProvider(args);
            providerName = args.ProviderName; 
            RoleProvider provider = Roles.Providers[providerName];
            if (provider == null) { 
                throw new ProviderException(AtlasWeb.RoleService_RoleProviderNotFound); 
            }
            return provider; 
        }

        [OperationContract]
        public string[] GetRolesForCurrentUser() { 
            try {
                ApplicationServiceHelper.EnsureRoleServiceEnabled(); 
                EnsureProviderEnabled(); 

                IPrincipal user = ApplicationServiceHelper.GetCurrentUser(HttpContext.Current); 
                string username = ApplicationServiceHelper.GetUserName(user);
                RoleProvider provider = GetRoleProvider(user);

                return provider.GetRolesForUser(username); 
            }
            catch (Exception e) { 
                LogException(e); 
                throw;
            } 
        }

        [OperationContract]
        public bool IsCurrentUserInRole(string role) { 
            if (role == null) {
                throw new ArgumentNullException("role"); 
            } 

            try { 
                ApplicationServiceHelper.EnsureRoleServiceEnabled();
                EnsureProviderEnabled();

                IPrincipal user = ApplicationServiceHelper.GetCurrentUser(HttpContext.Current); 
                string username = ApplicationServiceHelper.GetUserName(user);
                RoleProvider provider = GetRoleProvider(user); 
 
                return provider.IsUserInRole(username, role);
            } 
            catch (Exception e) {
                LogException(e);
                throw;
            } 
        }
 
        private void LogException(Exception e) { 
            WebServiceErrorEvent errorevent = new WebServiceErrorEvent(AtlasWeb.UnhandledExceptionEventLogMessage, this, e);
            errorevent.Raise(); 
        }

        private void OnSelectingProvider(SelectingProviderEventArgs e) {
            EventHandler handler = _selectingProvider; 
            if (handler != null) {
                handler(this, e); 
            } 
        }
 
        //hiding public constructor
        internal RoleService() {
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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RoleService.cs source code in C# .NET

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