Error "Object reference not set to an instance of an ob

Posted by Community Admin on 26-Jan-2011 00:00

Hello. I get the problem:
Environment:
1. SiteFinity 4 01033Sitefinity_4.0.1110.0-Developers-Only
2. FireFox 4.0b10pre (2011-01-25)
3. Win 7 64bit

How to:
1. Implemented custom

public class DummyRoleProviderSF4:RoleDataProvider
and
public class DummyMembershipProviderSf4:MembershipDataProvider

2. Registered providers in SF4
3. login in localhost:60876/.../Users
4. Got the problem and error message "Object reference not set to an instance of an object"

Question: How can i get more detailed analysis about this problem ?

Thank you.

Posted by Community Admin on 01-Feb-2011 00:00

Hello Vik,

Can you check the HTTP request and HTTP response when you get the error? I am sending you a sample implementation for Membership provider that works fine at my end

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using Telerik.Sitefinity.Security.Data;

using Telerik.Sitefinity.Security.Model;

using Telerik.Sitefinity.Security;

namespace Telerik.Sitefinity.Samples

public class MembershipDataProviderCustom : MembershipDataProvider

public override Security.Model.User CreateUser(string userName)

//

return null;

public override Security.Model.User CreateUser(Guid id, string userName)

//

return null;

public override Security.Model.User GetUser(Guid id)

//

return null;

public override IQueryable<Security.Model.User> GetUsers()

//

List<User> list = new List<User>(1) ;

var manager = UserManager.GetManager();

var q = manager.GetUsers().Where(us => us.UserName == "test1").SingleOrDefault();

if (q == null)

var u = manager.CreateUser("test1");

manager.SaveChanges();

list.Add(u);

return list.AsQueryable<User>();

list.Add(q);

return list.AsQueryable<User>();

public override void Delete(Security.Model.User item)

//

Greetings,
Ivan Dimitrov
the Telerik team

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