NullReferenceException at SqlConnection conn = new

Question

System.NullReferenceException was unhandled by user code

getting exception at this line

SqlConnection conn = new SqlConnection(
                       ConfigurationManager.
                       ConnectionStrings["SqlDataSourceRegistration"].
                       ConnectionString);

Your connection string SqlDataSourceRegistration does not exist — Patrick Hofman, Apr 23 '14 at 09:10
on web.config its unable to find the key SqlDataSourceRegistration — Ehsan Sajjad, Apr 23 '14 at 09:11

Patrick Hofman · Accepted Answer · 2014-04-23T09:16:19.040

3

Your connection string SqlDataSourceRegistration does not exist.

Check your app.config or web.config and check whether you spelled the connection string right, or whether you added it at all. Read MSDN: Connection Strings and Configuration Files how to do this.

EDIT:

The connection string is called RegistrationConnectionString.

Use this:

SqlConnection conn = new SqlConnection(
                       ConfigurationManager.
                       ConnectionStrings["RegistrationConnectionString"].
                       ConnectionString);

edited Apr 23 '14 at 09:16

answered Apr 23 '14 at 09:11

Patrick Hofman

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already added – user3555689 Apr 23 '14 at 09:15
@user3555689: See the updated answer. – Patrick Hofman Apr 23 '14 at 09:16

NullReferenceException at SqlConnection conn = new

1 Answers1