Why is my ASP.NET Web Service Failing to Connect to SQL Server with Error 'Login Failed for User 'xyz\ASPNET''?

Resolving ASP.NET Web Service SQL Connection Errors: "Login Failed for User 'xyzASPNET'"

My ASP.NET web service, designed for data storage, is throwing this error:

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

The current connection string is:

<code>Data Source=.\SQLExpress;Initial Catalog=IFItest;Integrated Security=True</code>

Problem Diagnosis:

The error message clearly states that the web service, running under the 'xyzASPNET' account, lacks the necessary permissions to access the SQL Server database. The solution involves either granting this account database access or providing explicit credentials within the connection string.

Solution: Adjusting Connection String or SQL Server Permissions

Using integrated Windows authentication (Integrated Security=True) requires creating a SQL Server login for the 'xyzASPNET' account. Alternatively, modify the connection string to specify a valid SQL Server username and password:

<code>connectionString="Server=.\SQLExpress;Database=IFItest;User ID=xyz;Password=top$secret"</code>

Remember to create a user named 'xyz' with the password 'top$secret' (or your chosen credentials) within your SQL Server database and grant this user the appropriate database access privileges. Using explicit credentials is often a more secure approach than relying solely on integrated security.

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