An error occured while establishing a connection to the
server. When connecting to the SQL
server 2005, the failure may be caused
by the fact that under the default
settings SQL server does not allow
remote connections. (provider: Named
pipes provider, error: 40 - Could not
open a connection to SQL server)
I am using .NET framework provider for SQL Server and Visual Studio 2008.
Data Source=.\SQLEXPRESS;AttachDbFilename="";Integrated Security=True;User Instance=True
What am I missing here?
I know external references are bad, but it really does not get better than this:
http://www.connectionstrings.com/
as they say
Server=.\SQLExpress;AttachDbFilename=c:\mydbfile.mdf;Database=dbname; Trusted_Connection=Yes;
AttachDbFilename should be the path to the database filed (generally a .mdf) that you will be using.
Data Source=.\SQLEXPRESS;AttachDbFilename=c:\some.mdf;Integrated Security=True;User Instance=True
An error occured while establishing a
connection to the server. When
connecting to the SQL server 2005, the
failure may be caused by the fact that
under the default settings SQL server
does not allow remote connections.
(provider: Named pipes provider,
error: 40 - Could not open a
connection to SQL server)
By default SQL Server Express disables remote connections via TCP/IP and Named Pipes, so you will need to enable these protocols in the SQL Server Configuration Manager (Start --> Programs --> Microsoft SQL Server 2008 --> Configuration Tools).
I also agree with Hogan about ConnectionStrings.com great site!
Related
I am trying to connect to my SQL Server but I get this error
TITLE: Connect to Server
Cannot connect to BRIAN.
ADDITIONAL INFORMATION:
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) (Microsoft SQL Server, Error: 2)
The system cannot find the file specified
This is my connectionstring so far
<connectionStrings>
<add name="DefaultConnection" connectionString="Data Source=(LocalDb)\v11.0;Initial Catalog=aspnet-ImagesSample-20140730183036;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnet-ImagesSample-20140730183036.mdf" providerName="System.Data.SqlClient" />
</connectionStrings>
This is because wherever your application is cannot connect to the SQL server. This could be down to a whole manner of causes. Here are a few of the most common:
Is the machine hosting the SQL database actually switched on and running?
Are the appropriate SQL services running?
Try to connect to the SQL instance from the SQL machine itself?
Try to connect to the database server from your application server (dev box) using a different application - Management Studio or LinqPad perhaps?
Is your connection string right?
Is there a firewall protecting the SQL box?
Is there a firewall preventing outbound communication? Turn off firewalls and eliminate one by one
Is your connection string referring to the server by IP? DNS name? Is the DNS correct? You can usually check this by trying to connect to the server using the same details using a ping/nslookup/rdp
It's unlikely this sort of exception is caused by invalid credentials.
Do all you SQL server communication using TCP/IP. The default port of SQL Server installation is 1433. This port can be changed through SQL Server Configuration Manager. TCP/IP should be enabled for SQL Server to be connected.
Go to All Programs >> Microsoft SQL Server 2008 >> Configuration Tools >> SQL Server Configuration Manager >> Select TCP/IP
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. [provider: Named Pipes Provider, error: 40 - could not open a connection to SQL Server.]
Please help!
Thanks!
Your SQL Server doesn't allow for remote connections. Depending if you have access or not,
follow this url http://support.microsoft.com/kb/914277
But, this is pretty insecure, good luck.
I am new to managing servers but I have just been given full access to set up an MS SQL Database on win server 2003. I have created a Database successfully and can connect locally (via remote desktop server)
Problem is I can't connect to the database from my personal computer (remotely, via ms sql server management studio). I have followed several tutorials such as: http://blog.sqlauthority.com/2009/05/21/sql-server-fix-error-provider-named-pipes-provider-error-40-could-not-open-a-connection-to-sql-server-microsoft-sql-server-error/
The error I am receiving is:
Cannot connect to 'servername'
ADDITIONAL INFORMATION:
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) (Microsoft
SQL Server, Error: 53)
Any help will be great, thanks!
"SQL Server is configured to allow remote connections"
You need to enable remote tcp/ip connections in sql surface area configuration. It's new in 2005 and then dropped in 2008.
If that doesn't work, you either have a network issue are are perhaps giving the wrong name - maybe you installed a named instance?
Is It Possible to connect SQL Server 2008 from SQL Server 2005 Enterprise Manager?
I am getting below mentioned error while connecting An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 1326)
Yes it's possible.
Have you used the SQL Server Configuration Manager to enable remote connections?
Under SQL Native Client 10.0 Configuration --> Client Protocols, you need to enable TCP/IP (I assume that's what you are using).
I'm unable to connect to SQL Server 2005 from .NET. I'm getting the error " 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 strange thing is, I'm able to connect through management studio using the same credentials (SQL Server authentication).
My connection string is: Server=servername;User ID=xxx;Password=xxx
I'm using the 2005 native client.
Also, I just realized Management Studio cannot connect if using named pipes, only TCP/IP.
What tells ADO.NET which protocol to use?
SQL Server 2005 may not be allowing inbound named pipes connections. This can be configured differently for the older SQL Server protocol and for the 2005+ Native Client. Check the SQL Server Configuration Manager on your database server.
(And yes, the Management Studio would still be able to connect to the remote database if named pipes were disallowed.)