Learn more. ConnectionString in the web. Asked 5 years ago. Active 5 years ago. Viewed 8k times. Add full exception text — Backs. Sorry that was a typo when I copied pasted.
I have edited the question. I am giving the same name in both Web. You might need to add user to your database or modify password. Show 8 more comments. Active Oldest Votes.
Backs Backs I tried to check the authentication mode for the server, it is Windows authentication. SQL Server does not ask for the password, and does not perform the identity validation Add a comment. For settings that have alternative names, those are added in parentheses. You can use ". If you omit the instance name, the default instance is assumed. For named instances of LocalDB, replace "v For SQL Database the value of this setting typically has a "tcp:" prefix to indicate the protocol used and a "," suffix to indicate the port number.
You can use the DataDirectory variable in place of an absolute path; for information about this option, see the following section about the AttachDBFileName setting. This ensures that the path to your database remains current if the application is moved to a different directory. If you don't use the DataDirectory connection string variable, you have to provide the full physical path to the database file. For more information, see User Instance later in this topic.
The first time you connect to a database by using this option in the connection string, the SQL Server Express or LocalDB instance attaches the database, and it stays attached. When you want to connect to the same database in the future you could use Initial Catalog without AttachDbFileName if you prefer.
For more information, see SqlConnection. If the database will be used by the Entity Framework and your application targets the. You can omit this setting in applications that target the. NET Framework 4. If you omit this setting, ADO. If the full path is longer than characters, a default database name is constructed from the path by appending a hash of the full path to the file name.
In LocalDB connection strings, the Visual Studio web project templates add a unique number as a suffix to both the file name and the Initial Catalog setting, as shown in the following example:. Suppose the project specified the following values:. When you create a project with these settings and run it, LocalDB attaches the aspnet. The operation fails because that name is already attached to the first project's aspnet.
For the same reason, the suffixes added by the Visual Studio templates won't prevent name collisions if you create a copy of a project by copying the files instead of by creating a new project in Visual Studio, which generates a new unique number. If you want to create a new project by copying an existing project's files, change the suffix number manually to make it unique. With this connection string, what happens to the database name in the SQL Server instance is complicated.
If the database is created by the ASP. NET membership system or by Entity Framework Code First, a database name is created by taking the file name without the.
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