C# 4 and .NET 4

550 ❘ ChaPTer 21 security
For using roles, you also need to implement a role provider. The class SampleRoleProvider derives from
the base class RoleProvider and implements the methods GetRolesForUser() and IsUserInRole():
using System;
using System.Collections.Specialized;
using System.Web.Security;
namespace Wrox.ProCSharp.Security
{
public class SampleRoleProvider: RoleProvider
{
internal static string ManagerRoleName = "Manager".ToLowerInvariant();
internal static string EmployeeRoleName = "Employee".ToLowerInvariant();
public override void Initialize(string name, NameValueCollection config)
{
base.Initialize(name, config);
}
public override void AddUsersToRoles(string[] usernames,
string[] roleNames)
{
throw new NotImplementedException();
}
// override abstract RoleProvider members
// ...
public override string[] GetRolesForUser(string username)
{
if (string.Compare(username,
SampleMembershipProvider.ManagerUserName, true) == 0)
{
return new string[] { ManagerRoleName };
}
else if (string.Compare(username,
SampleMembershipProvider.EmployeeUserName, true) == 0)
{
return new string[] { EmployeeRoleName };
}
else
{
return new string[0];
}
}
}
}
public override bool IsUserInRole(string username, string roleName)
{
string[] roles = GetRolesForUser(username);
foreach (var role in roles)
{
if (string.Compare(role, roleName, true) == 0)
{
return true;
}
}
return false;
}
code snippet AppServices/SampleRoleProvider.cs
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