Change ASP.NET Membership Provider by code

Question

We are in need of supporting two Membership providers simultaneously in an ASP.NET WebFroms application. Indeed user by checking a Checkbox indicates that he/she wants to login via Asp Net Sql Membership Provider or Asp Net Active Directory Membership Provider

My idea is changing Membership provider programmatically based on Checkbox checked value. But do not know how can do this.

Any help is highly appreciated.

Answer 1

What you need is a composite provider that wraps the two real providers and a service that can determine which provider should be used.

UPDATE

Your CompositeProvider might look like this and can be registered in your web.config just like any other provider.

public class CompositeProvider : MembershipProvider
{
    private MembershipProvider SqlProvider
    {
        get { return Membership.Providers["Sql Provider"]; }
    }

    private MembershipProvider AdProvider
    {
        get { return Membership.Providers["Ad Provider"]; }
    }

    // This property implements the logic that knows how
    // to switch between the two providers.
    private MembershipProvider Provider
    {
        get
        {
            var context = HttpContext.Current;

            if (context != null)
            {
                var session = context.Session;

                if (session != null &&
                    session["use_ad_provider"] == "true")
                {
                    return AdProvider;
                }
            }

            return SqlProvider;
        }
    }

    public override bool ChangePassword(string username, 
        string oldPassword, string newPassword)
    {
        return Provider.ChangePassword(username, oldPassword, newPassword);
    }

    public override bool DeleteUser(string username, 
        bool deleteAllRelatedData)
    {
        return Provider.DeleteUser(username, deleteAllRelatedData);
    }

    public override bool EnablePasswordReset
    {
        get { return Provider.EnablePasswordReset; }
    }

    public override bool EnablePasswordRetrieval
    {
        get { return Provider.EnablePasswordRetrieval; }
    }

    // TODO: Implementation of all other members.
}

Answer 2

This is essentially the same answer as Steven's , but with a fully implemented class (to save someone else the time of writing this all out).

public class CompositeProvider : MembershipProvider
{

    public override string ApplicationName
    {
        get
        {
            return _provider.ApplicationName;
        }
        set
        {
            _provider.ApplicationName = value;
        }
    }

    private MembershipProvider _provider
    {
        get
        {
            // Insert your logic here to change between multiple providers
            if(SomeCondition == true)
                return Membership.Providers["AspNetSqlMembershipProvider"];
            else
                return Membership.Providers["AspNetSqlMembershipProvider2"];
        }
    }

    public override bool ChangePassword(string username, string oldPassword, string newPassword)
    {
        return _provider.ChangePassword(username, oldPassword, newPassword);
    }

    public override bool ChangePasswordQuestionAndAnswer(string username, string password, string newPasswordQuestion, string newPasswordAnswer)
    {
        return _provider.ChangePasswordQuestionAndAnswer(username, password, newPasswordQuestion, newPasswordAnswer);
    }

    public override MembershipUser CreateUser(string username, string password, string email, string passwordQuestion, string passwordAnswer, bool isApproved, object providerUserKey, out MembershipCreateStatus status)
    {
        return _provider.CreateUser(username, password, email, passwordQuestion, passwordAnswer, isApproved, providerUserKey, out status);
    }

    public override bool DeleteUser(string username, bool deleteAllRelatedData)
    {
        return _provider.DeleteUser(username, deleteAllRelatedData);
    }

    public override bool EnablePasswordReset
    {
        get { return _provider.EnablePasswordReset; }
    }

    public override bool EnablePasswordRetrieval
    {
        get { return _provider.EnablePasswordRetrieval; }
    }

    public override MembershipUserCollection FindUsersByEmail(string emailToMatch, int pageIndex, int pageSize, out int totalRecords)
    {
        return _provider.FindUsersByEmail(emailToMatch, pageIndex, pageSize, out totalRecords);
    }

    public override MembershipUserCollection FindUsersByName(string usernameToMatch, int pageIndex, int pageSize, out int totalRecords)
    {
        return _provider.FindUsersByName(usernameToMatch, pageIndex, pageSize, out totalRecords);
    }

    public override MembershipUserCollection GetAllUsers(int pageIndex, int pageSize, out int totalRecords)
    {
        return _provider.GetAllUsers(pageIndex, pageSize, out totalRecords);
    }

    public override int GetNumberOfUsersOnline()
    {
        return _provider.GetNumberOfUsersOnline();
    }

    public override string GetPassword(string username, string answer)
    {
        return _provider.GetPassword(username, answer);
    }

    public override MembershipUser GetUser(string username, bool userIsOnline)
    {
        return _provider.GetUser(username, userIsOnline);
    }

    public override MembershipUser GetUser(object providerUserKey, bool userIsOnline)
    {
        return _provider.GetUser(providerUserKey, userIsOnline);
    }

    public override string GetUserNameByEmail(string email)
    {
        return _provider.GetUserNameByEmail(email);
    }

    public override int MaxInvalidPasswordAttempts
    {
        get { return _provider.MaxInvalidPasswordAttempts; }
    }

    public override int MinRequiredNonAlphanumericCharacters
    {
        get { return _provider.MinRequiredNonAlphanumericCharacters; }
    }

    public override int MinRequiredPasswordLength
    {
        get { return _provider.MinRequiredPasswordLength; }
    }

    public override int PasswordAttemptWindow
    {
        get { return _provider.PasswordAttemptWindow; }
    }

    public override MembershipPasswordFormat PasswordFormat
    {
        get { return _provider.PasswordFormat; }
    }

    public override string PasswordStrengthRegularExpression
    {
        get { return _provider.PasswordStrengthRegularExpression; }
    }

    public override bool RequiresQuestionAndAnswer
    {
        get { return _provider.RequiresQuestionAndAnswer; }
    }

    public override bool RequiresUniqueEmail
    {
        get { return _provider.RequiresUniqueEmail; }
    }

    public override string ResetPassword(string username, string answer)
    {
        return _provider.ResetPassword(username, answer);
    }

    public override bool UnlockUser(string userName)
    {
        return _provider.UnlockUser(userName);
    }

    public override void UpdateUser(MembershipUser user)
    {
        _provider.UpdateUser(user);
    }

    public override bool ValidateUser(string username, string password)
    {
        return _provider.ValidateUser(username, password);
    }
}