SQL Server problem in multi-user situation

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Hello
I have a problem in my application: If one user connects it works fine, but when 3 or more users log on I get errors displayed on the screen kind of:

---> The table has not a primary key.
---> Unable to cast object of type 'System.Int32' to type 'System.String'.
---> The index is outside the bounds of the array.
---> Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
--->System.Data.SqlClient.SqlException: SHUTDOWN is in progress.
Login failed for user '######'

Each page gives me a different error

Thank you for your help

Posted 15-Oct-10 1:53am

achekraali

Updated 15-Oct-10 1:56am

Johnny J.

v2

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Johnny J. 15-Oct-10 7:56am

I have given your post a meaningful subject...

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Pavel Yermalovich · Answer 1 · 2010-10-15T10:34:00

Solution 1

So. All is very confusing. My point of view is you have some errors in your business logic or in data access layer.

Posted 15-Oct-10 10:34am

Pavel Yermalovich

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achekraali 18-Oct-10 10:27am

thanks for your post
yes i have a problem with the connection declaration
i make protected static sqlconnection conn =new sqlconnection ect ...