Using ASP.NET, getting an "Object reference not set to an instance of an
object" error.
In my login.aspx page I have:
string[] arrUserRoles = new string[] {"UserRole"};

I want to use treevieuw componenton a web-form.
does anyone know how I havr to use it? if I open toolbar than I can't see
trevieuw.
I also use C#.

I'm running a web site and implementing both folder(web.config) and class
level authorization. A new requirement came in to allow an external web site
to access some secure web pages directly, without going through the logon
page.

I am developing for an Intranet with about 100 users
(we do computer training).
We're running about 12 different ASP.NET applications.
4 of these applications require authentication.

I am running a Win2K Server as a secondary domain
controller.  When I installed the .Net Framework v1.1
There was no ASPNET user account created.  How can I
create the ASPNET user?

I have a very simple aspx file that runs on WinXP Pro IIS 5.1 and connects
to a SQL Server 2k DB running on a Win2003 Server box. It works fine with
the connection string below (X replace real values for security).
"packet size=4096;user id=XXX;pwd=XXX;data source='XX.XXX.XXX.X' ...

Having come from old ASP I usually have a table of authorised NT login
names which I put into a recordset. I then get the current users login
name using: Request.ServerVariables("LOGON_USER")
Then I check if the user's login name is in the recordset and redirect

What are the differences between authentication and session cookies? In my
web.config file, I set the cookieless attribute for the sessionState element
to false.  Why do we need 2 different types of cookies?  Is the session
cookie enough for authentication purpose?

Microsoft Knowledge Base Article - 306158
[http://support.microsoft.com/default.aspx?scid=kb;en-
us;306158] shows a method to impersonate a specific user
in code via a web form.

I am using windows forms authentication in my asp.net web application so
that it uses ADSI to validate users.
The application is in a virtual directory on my local system,
(http://Localhost/MyApp), and it makes the call to a domain server on our

I'm using Windows Authentication in my C# ASP.Net intranet
application.  I have a "Delete" column in a DataGrid which I only want
displayed if the Windows user is a member of the "Administrators" or
"Managers" group.  I have the code for that working, but when someone

Security tab page in the folder property dialogbox (found
when right-click on a folder and click 'Property' from
the context menu) doesn't apperar in my computer, I used
Windows XP Professional, in which I want grant READ/WRITE

I get the following error when I try to run my web page in
asp.net.
The Microsoft Jet database engine cannot open the
file 'c:\inetpub\wwwroot\test\test.mdb'. It is already

PLEASE HELP....
I'm having trouble.  In my login form after I've verified the
username/password are valid I do this:
   Select Case iMyPrivilege

hi group,
i previously have a single machine development environment on server03
(w2K3, stand alone, SQL2K).
i configured it so that my app is using "NT AUTHORITY\NETWORK SERVICE" to