When type "update-database" in PM console in VS i got below error. ??

Error Number:2,State:0,Class:20
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

The error message you received indicates that the Entity Framework was unable to establish a connection to the SQL Server instance that you specified in your project's configuration. This could be due to several reasons, including:

The SQL Server instance is not running or is not accessible from your current network location.
The connection string in your project's configuration file is incorrect or incomplete.
The SQL Server instance is not configured to allow remote connections.
Your SQL Server instance may be configured to use a different protocol, such as TCP/IP, instead of Named Pipes.

Here are some steps you can take to troubleshoot and resolve the issue:

Verify that the SQL Server instance is running and is accessible from your network location. You can test this by trying to connect to the SQL Server instance using SQL Server Management Studio or another tool.
Check your connection string to ensure that it is correct and complete. The connection string should include the server name, database name, and any authentication information that is required to connect to the SQL Server instance.
If you are using a remote SQL Server instance, make sure that it is configured to allow remote connections. You can check this by opening the SQL Server Configuration Manager and verifying that the TCP/IP and Named Pipes protocols are enabled and configured to allow remote connections.
If your SQL Server instance is configured to use a different protocol, such as TCP/IP, you will need to update your connection string accordingly.

4 Replies

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Tuhin Paul3y ago
Are you using any special character in your connection srtring?
Tuhin Paul3y ago
Check the user account used to connect to the SQL Server has the necessary permissions to access the database.
Tuhin Paul3y ago
The error message indicates that there is a problem connecting to the SQL Server. Check the connection string in your application is correct and points to the correct SQL Server instance.
Amit Mohanty3y ago
The error message you received indicates that the Entity Framework was unable to establish a connection to the SQL Server instance that you specified in your project's configuration. This could be due to several reasons, including:
1. The SQL Server instance is not running or is not accessible from your current network location.
2. The connection string in your project's configuration file is incorrect or incomplete.
3. The SQL Server instance is not configured to allow remote connections.
4. Your SQL Server instance may be configured to use a different protocol, such as TCP/IP, instead of Named Pipes.
Here are some steps you can take to troubleshoot and resolve the issue:
1. Verify that the SQL Server instance is running and is accessible from your network location. You can test this by trying to connect to the SQL Server instance using SQL Server Management Studio or another tool.
2. Check your connection string to ensure that it is correct and complete. The connection string should include the server name, database name, and any authentication information that is required to connect to the SQL Server instance.
3. If you are using a remote SQL Server instance, make sure that it is configured to allow remote connections. You can check this by opening the SQL Server Configuration Manager and verifying that the TCP/IP and Named Pipes protocols are enabled and configured to allow remote connections.
4. If your SQL Server instance is configured to use a different protocol, such as TCP/IP, you will need to update your connection string accordingly.