I am really frustrated, this is very simple but didn't work with me. I'm trying to connect to my SQL Server which I don't need username and password when running SSMS. My server name is HP\\SQLEXPRESS
and I'm using the following connection string:
string connectionString = "Data Source=HP\\SQLEXPRESS;Initial Catalog=Students.mdf;Integrated Security=SSPI;";
and I get the following error:
An unhandled exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll
Additional information: Cannot open database "Students.mdf" requested by the login. The login failed.
Login failed for user 'HP\\Aymen'.
And when I specify the full address of my database as follows:
string connectionString = "Data Source=HP\\SQLEXPRESS;Initial Catalog=c:\\Program Files\\Microsoft SQL Server\\MSSQL11.SQLEXPRESS\\MSSQL\\DATA\\Students.mdf;Integrated Security=SSPI;";
it also gives me the same error.
Any suggestion?
I believe you have permissions problem for that user.
have you tried login with other user (admin user) to that db?
when you're connecting from the SSMS, you have admin privileges. i think this is not the case of the user that run your program.
however, i would suggest you to create a specific user using create login then, simply just add your parameters to sql server connection string
Try using sa login to access the database
User ID=sa;
Password="your password without quotes";
and
data source=.
in your connection string
FOR WINDOWS Auth.
string connectionString = "Data Source=.;Initial Catalog=Students;Integrated Security=SSPI;"
FOR SQL AUTH.
string connectionString="Data Source=.;User ID=sa;
Password=; Initial Catalog=Students; " providerName="System.Data.SqlClient";
try this
I think Your are using Windows Authentication
string connectionString = "Data Source=HP\\SQLEXPRESS;
Initial Catalog=Students;Integrated Security=SSPI;"
seems authentication issue here. you should specify the user id too in the connection string.
string connectionString = "Data Source=HP\\SQLEXPRESS;Initial Catalog=Students;Integrated Security=SSPI;User ID=PCName\WindowsUser;";
If still doesn't work then try this also.
string connectionString = "Server=HP\\SQLEXPRESS;Database=Students;Trusted_Connection=True;
The problem solved. It seems that the problem is because I already have made a connection to the database using Entity Framework model. When I removed it and run the application again everything went fine.
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