Cannot open database "test" requested by the login. The login failed. Login failed for user 'xyz\ASPNET'

Question

I have created a web service which is saving some data into to db. But I am getting this error:

Cannot open database "test" requested by the login. The login failed. Login failed for user 'xyz\ASPNET'.

My connection string is

Data Source=.\SQLExpress;Initial Catalog=IFItest;Integrated Security=True

Answer 1

Well, the error is pretty clear, no? You are trying to connect to your SQL Server with user "xyz/ASPNET" - that's the account your ASP.NET app is running under.

This account is not allowed to connect to SQL Server - either create a login on SQL Server for that account, or then specify another valid SQL Server account in your connection string.

Can you show us your connection string (by updating your original question)?

UPDATE: Ok, you're using integrated Windows authentication --> you need to create a SQL Server login for "xyz\ASPNET" on your SQL Server - or change your connection string to something like:

connectionString="Server=.\SQLExpress;Database=IFItest;User ID=xyz;pwd=top$secret"

If you have a user "xyz" with a password of "top$secret" in your database.

Answer 2

• Either: "xyz\ASPNET" is not a login (in sys.server_principals)
• Or: "xyz\ASPNET" is set up but not mapped to a user in the database test (sys.database_principals)

I'd go for the 2nd option: the error message implies the default database is either not there or no rights in it, rather than not set up as a login.

To test if it's set up as a login

SELECT SUSER_ID('xyz\ASPNET') -- (**not** SUSER_SID)

If NULL

CREATE LOGIN [xyz\ASPNET] FROM WINDOWS

If not NULL

USE test
GO
SELECT USER_ID('xyz\ASPNET')

If NULL

USE test
GO
CREATE USER [xyz\ASPNET] FROM LOGIN [xyz\ASPNET]

Answer 3

I had this problem and what solved it for me was to:

• Go to the Application pools in the IIS
• Right click on my project application pool
• In Process Model section open Identity
• Choose Custom account option
• Enter your pc user name and password.

Answer 4

For me the database was not created and EF code first should have created it but always endet in this error. The same connection string was working in aspnet core default web project. The solution was to add

_dbContext.Database.EnsureCreated()

before the first database contact (before DB seeding).

Answer 5

The best solution for the login problem is to create a login user in sqlServer. Here are the steps to create a SQL Server login that uses Windows Authentication (SQL Server Management Studio):

1. In SQL Server Management Studio, open Object Explorer and expand the folder of the server instance in which to create the new login.
2. Right-click the Security folder, point to New, and then click Login.
3. On the General page, enter the name of a Windows user in the Login name box.
4. Select Windows Authentication.
5. Click OK.

For example, if the user name is xyz\ASPNET , then enter this name into Login name Box.

Also you need to change the User mapping to allow access to the Database which you want to access.

Answer 6

Most times, it's not a login issue, but an issue with creating the database itself. So if there is an error creating your database, it would not be created in the first place. In which case if you tried to log in, regardless of the user, login would fail. This usually happens due to logical misinterpretation of the db context.

Visit the site in a browser and REALLY read those error logs, this can help you spot the problem with you code (usually conflicting logic problems with the model).

In my case, the code compiled fine, same login problem, while I was still downloading management studio, I went through the error log, fixed my db context constraints and site started running fine....meanwhile management studio is still downloading

Answer 7

It also happen when you type wrong name of DB

ex : xxx-db-dev to xxx-dev-db

Sometime, it's just a stupid mistake . I take about more than 1 hours to find out this :( because i just try alot of difficult thing first

Answer 8

This Works for me.

1. Go to SQL Server >> Security >> Logins and right click on NT AUTHORITY\NETWORK SERVICE and select Properties
2. In newly opened screen of Login Properties, go to the “User Mapping” tab.
3. Then, on the “User Mapping” tab, select the desired database – especially the database for which this error message is displayed.
4. Click OK.

Read this blog.

http://blog.sqlauthority.com/2009/08/20/sql-server-fix-error-cannot-open-database-requested-by-the-login-the-login-failed-login-failed-for-user-nt-authoritynetwork-service/

Answer 9

The Issue

The error presents itself as a message similar to this:

Cannot open database "DATABASE NAME" requested by the login. The login failed. Login failed for user XYZ.

• The error cannot usually be rectified by a simple Visual Studio or full-computer restart.
• The error can also be found as a seemingly locked database file.

The Fix

The solution is laid in the following steps. You will not lose any data in your database and you should not delete your database file!

Pre-requisite: You must have installed SQL Server Management Studio (Full or Express)

1. Open SQL Server Management Studio
2. In the "Connect to Server" window (File->Connect object explorer) enter the following:
   • Server type : Database Engine
   • Server name : (localdb)\v11.0
   • Authentication : [Whatever you used when you created your local db. Probably Windows Authentication).
3. Click "Connect"
4. Expand the "Databases" folder in the Object Explorer (View->Object Explorer, F8)
5. Find your database. It should be named as the full path to your database (.mdf) file
   • You should see it says "(Pending Recovery)" at the end of the database name or when you try to expand the database it won't be able to and may or may not give you an error message.
   • This the issue! Your database has crashed essentially..
6. Right click on the database then select "Tasks -> Detach...".
7. In the detach window, select your database in the list and check the column that says "Drop Connections"
8. Click OK.
9. You should see the database disappear from the list of databases. Your problem should now be fixed. Go and run your application that uses your localdb.
10. After running your application, your database will re-appear in the list of databases - this is correct. It should not say "Pending recovery" any more since it should be working properly.

The source of the solution: https://www.codeproject.com/Tips/775607/How-to-fix-LocalDB-Requested-Login-failed

Answer 10

I tried to update the user, and it worked. See the command below.

USE ComparisonData// databaseName
EXEC  sp_change_users_login @Action='update_one', @UserNamePattern='ftool',@LoginName='ftool';

Just replace user('ftool') accordingly.

Answer 11

我使用 Windows 身份验证连接到本地数据库 .mdf 文件，我的本地服务器是 sql server 2014。使用此连接字符串解决了我的问题：

string sqlString = " Data Source = (LocalDB)\\MSSQLLocalDB;" + "AttachDbFilename = F:\\.........\\myDatabase.mdf; Integrated Security = True; Connect Timeout = 30";

Answer 12

In my case it is a different issue. The database turned into single user mode and a second connection to the database was showing this exception. To resolve this issue follow below steps.

1. Make sure the object explorer is pointed to a system database like master.
2. Execute a exec sp_who2 and find all the connections to database 'my_db'. Kill all the connections by doing KILL { session id } where session id is the SPID listed by sp_who2.

USE MASTER;
EXEC sp_who2

3. Alter the database

USE MASTER;
ALTER DATABASE [my_db] SET MULTI_USER
GO

Answer 13

I have not seen this mentioned in the previous issues, so let me throw out another possibility. It could be that IFItest is not reachable or simply does not exist. For example, if one has a number of configurations, each with its own database, it could be that the database name was not changed to the correct one for the current configuration.

Answer 14

NB: If using a windows service to host the webservice.

You have to insure that your webservice is using the right Log on account to connect to SQL Server.

• Open services(I assume the windows service has been install)
• Right click on the service and goto properties.
• Click on "Log On" Tab
• Click on "This account" radio button
• Click "Browse"
• Enter Pc user name in Text Field and click "Check Name" Button to the right.
• Click on text in Text Field, press "OK" button
• enter login password and Apply

Answer 15

Inspired by cyptus's answer I used

_dbContext.Database.CreateIfNotExists();

on EF6 before the first database contact (before DB seeding).

Answer 16

如果您尚未在服务器中创建数据库，您将收到相同的登录错误。请确保数据库在您登录之前存在。

Answer 17

I ran into this issue when attempting to write to the default database provided in the asp.net mvc template. This was due to the fact that the database hadn't been created yet.

To create the database and make sure that it is accessible follow these steps:

1. Open up the Package manager console in Visual Studio
2. Run the command "update-database"

This will create the database an run all the necessary migrations on it.

Answer 18

it's not a login issue most times. The database might not have been created. To create the database, Go to db context file and add this.Database.EnsureCreated();

Answer 19

I had this problem when I created a WPF .NET Core + Entity Framework Core project and then cloning it on aa new laptop.

Using:

update-database

in the package manager console simply solved it.

To open package manager console go to:

Tools-> Nuget Package Manager -> Package Manager console

Answer 20

I found that I also had to set the UserMapping option when creating a new login and this solved the problem for me. Hope that helps anyone that also found themselves stuck here!

Edit: Setting the login as db owner solved the next problem, too

Answer 21

The best option would be to use Windows integrated authentication as it is more secure than sql authentication. Create a new windows user in sql server with necessary permissions and change IIS user in the application pool security settings.

Answer 22

Some times this trouble may appear if you open this db in another sql server (as example, you launch sql managment studio(SMS) and add this db), and forget stop this server. As result - you app try to connect with user already connected in this db under another server. To fix that, try stop this server by Config. dispatcher sql server.

My apologies about bad english. Kind regards, Ignat.

Answer 23

In my case the asp.net application can usually connect to database without any problems. I noticed such message in logs. I turn on the SQL server logs and I find out this message:

2016-10-28 10:27:10.86 Logon       Login failed for user '****'. Reason: Failed to open the explicitly specified database '****'. [CLIENT: <local machine>]
2016-10-28 10:27:13.22 Server      SQL Server is terminating because of a system shutdown. This is an informational message only. No user action is required.

So it seems that server was restarting and that SQL server whad been shutting down a bit earlier then ASP.NET application and the database was not available for few seconds before server restart.

Answer 24

即使您已将登录名设置为 DB 所有者并为将使用该登录名的数据库设置了用户映射，请检查实际的 DB 用户（不仅仅是登录名）是否具有“所有者”角色。

Answer 25

In my case, I was running a Windows Service under "System" identity. The error was:

System.Data.SqlClient.SqlException (0x80131904): 
Cannot open database "MyDbName" requested by the login. The login failed.
Login failed for user 'MYDOMAINNAME\HOSTNAME$'.

The problem is that the error is very misleading. Even after I added 'MYDOMAINNAME\HOSTNAME$' login to the database, and granted this login sysadmin access and added a user for that login on my target database, and made that user dbowner, I was still getting the same error. Apparently I needed to do the same for 'NT AUTHORITY\SYSTEM' login. After I did that, I was able to login without a problem. I don't know why the error message complains about 'MYDOMAINNAME\HOSTNAME$'. I deleted that login and the corresponding user and everything still works.

Answer 26

When using EF Code First, make sure the database exists. You could run the update-database command first.

Answer 27

If none of the above solution is working.

I encountered with the same error message but my issue was completely different. I had just restore my database and the database was in restoring mode. So if your database is in rstoring mode just apply following query.

RESTORE DATABASE MyDatabase
   FROM DISK = 'pathToYourDbBackup\MyDatabase.bak'
   WITH REPLACE,RECOVERY

Answer 28

If you didn't have any problems before and you get this error only in the package manager console, you don't need to do anything special. Just open the sql server object explorer window and connect and run the command again in the console.

Answer 29

I had this happen to me when I deleted the DB and forgot to recreate it. It happens sometimes, since Database folder needs refresh.