Reading from web configuration file

I can read connection string from webconfig file  from visual studio from the below mentioned code
in login.aspx page

 Private constr As String
    Private rootWebConfig As System.Configuration.Configuration
    Private connString As System.Configuration.ConnectionStringSettings

rootWebConfig = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("/WEBUI")    where WEBUI is project folder where webconfig resides.

        connString = rootWebConfig.ConnectionStrings.ConnectionStrings("Sqlserver")
        constr = connString.ConnectionString

I created  web deploy package and imported into localhost IIS 7. import application worked fine. when I tried to browse the login.aspx from IIS published folder I get the following msg

Server Error in '/KHWEB' Application.  -  KHWEB  web application name in IIS7

Object reference not set to an instance of an object.
vensaliAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

jorge_torizResearch & Development ManagerCommented:
Can you try with the following change?

OpenWebConfiguration("./WEBUI")
vensaliAuthor Commented:
I could solve the problem by giving   my web application name ( "/ App name")  hosted in iis in open configuration.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
vensaliAuthor Commented:
I could solve the problem by giving   my web application name ( "/ App name")  hosted in iis in open configuration.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
ASP.NET

From novice to tech pro — start learning today.